Colt ar-15 serial numbers

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USGI SERIAL NUMBER DATA BASE (serial numbers listed in chronological rather then numerical order): 101-14,484 1959-1963 US Air Force/Project AGILE/SEAL issue Colt's AR-15 Model 601, roll marked ARMALITE. Some sold commercially to police departments, small numbers to foreign militaries such as Malaya, India, Australia, Burma, and Singapore ...The Colt 1911 has a serial number that is stamped on the frame. This serial number can be used to identify the pistol and its history. The Colt 1911 serial number is a 10-digit number. The first two digits of the serial number indicate the year of manufacture. The next six digits are a random sequence of numbers.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Colt actually has serial number cutoffs, these are the last Pre-ban numbers in each series: CC001616, NL004800, TA10100, CHOI 9500, SL027284, BD000134, GCOI 8500, SP380200, LH011326, ST038100,Your SP1 carbine with the serial number beginning 135XXX was made in 1981. Colt ended production of this model sometime in 1982. For comparision, my SP1 lower is # 33XXX and was made in 1974. Mine was the full size 20" bbl. rifle. The parts were used for different Colt/AR projects.

The serial numbers for Bobcat equipment is placed in several different locations on different types of machines, according to Bobcat. The Operation and Maintenance manual for each ...Colt AR-15 Sporter SP1 rifle owner since 1971 Colt 1911 Government Model Series 80 .45 pistol owner since 1984 ... also has a very complete set of tables in the back detailing the changes and criteria of all military models and the serial numbers and names of all the Colt civilian models and their features. It is very complete, but there are ...Colt AR15 Serial Number under 010 - Some have No logo - Tool Room Guns with distinctive tool marks on receiver. There are at least 3 guns serial number #0004 attributed to Colt. Not to be confused with Armalite SN: 0004. Colt AR15 Model 01 - SN: 000,1xx: Usually has green painted bakelite furniture. Through.If you’re looking to find out when your Colt AR-15 was manufactured, one way to determine its production date is by referencing the serial number. Colt maintains a database with the production information for their firearms, and by providing them with the serial number, you can get an accurate manufacturing date for your AR-15. 1.The AR gene provides instructions for making a protein called an androgen receptor. Learn about this gene and related health conditions. The AR gene provides instructions for makin...List only goes up to 1982. I had a 199,XXX numbered SP1 and I was under the impression that it was made in the last year of production. I think May of 1984. Mike. This is it below. It is shown with an original finish Colt A1 upper. Never put a single round thru the original upper.3. Recently some serial numbers have left with one or two letters followed by FIVE numbers. The last numbers are either 5's or 0's. 99.9% of these are post-ban. 4. "Older" does not always mean pre-ban as per Corey Sattler. 5. "BL" serial number series lowers are transitional with some pre and some post ban.

Dec 31, 2019 ... Foam Rifle and Pistol Rest https://amzn.to/2mIjHSr Magpul MOE Stock https://amzn.to/2LI01Xn Magpul MBUS Front and Rear Backup Sight ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.The best way to verify the manufacture date is to call Colt at 800-962-COLT (2658) and ask them. There are many lists with dates, but almost all end in 1978. According to the Blue Book, serial numbers below GC018500 are pre-ban rifles. The printed information is not always correct as far as serial numbers and dates.AR15/M16 FAQs. AR15 CAD/Blueprint Files. Colt Variants. Colt Box Color FAQ. Colt Hammer Comparison . Colt Serial Numbers and Prefixes. Barrel and Bolt FAQ. Upper Receiver Comparison and FAQ. Magazine FAQ . Picatinny Rail Specifications. Pin and Spring Sizes. Recoil Buffers. Stocks. MILSPECs

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This article describes the many variations of the Colt AR-15 and M16 rifle family of weapons produced by Colt's Manufacturing Company. ... Colt military models without model numbers ... (Also produced under license by Colt Canada) 4th Generation M4 S-1 Flattop Yes Yes 5.56 NATO 16 in. M4 1:7 Yes A2R. Medina on October 31, 2020: ttn intnl model 1878 s/n 4751. michael v ventimiglia on October 30, 2020: new england firearms ( N G 001039 ) model r22 ultra mini. Volunteer arms co. on October 29, 2020: 16 gauge serial number is 90524xe what would it be worth and how old is it. Joseph Farrell on October 27, 2020:Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Warning . ... Colt "L" Prefix on serial numbers.AR15_1911. 1519 posts · Joined 2013. #2 · Feb 11, 2022. I'm no expert, just a very long time Colt AR owner and I kept notes of the serial numbers and configurations of the Colt model R6520 Gov't Carbine from AR15.com discussion forums. For the serial number GC 8K range are made 1991 - 1992, but the only thing that don't match is your green ...AR-15 » Rifles, Uppers, Lowers, Barrels, and more. AR Sponsor: Site Notices BFL Rollypoly Pre-Oder Is Live! ... Colt serial number lookup. ARCHIVED; Posted: 2/4/2013 7:46:02 PM EDT Hey guys, is there any way for me to verify a Colt serial number? I found a link to the Colt website, but I've tried several Colt LE serial numbers and none came up

So you have to do your research on what you want. Remember Colt didn't make a lot of these guns. In the LGC serial number series that runs basically the late 90's to 2011, we are talking 45 to 46,000 rifles. They stop production sometime and late 2010 or 2011. Those later guns would be in the 44 through 46000 serial numbers. Hope that …The lower receiver has the Colt four line markings with the four digit serial number "SER SP 06778" indicating mid production in 1966. This was the the third full year of Colt AR 15 production. It is fitted with the early original Colt marked parts such as the original non-chrome lined barrel with and "12" marking.CSL would be Colt Sporter Lightweight or a 6530. If you look at a preban version, the lower will say "Colt Sporter Lightweight" on the side. CST would be "Colt Sporter Target" or a 6551. MTH would be Match Target HBAR or a 6601. And so on... The serial number prefix on a postban indicates what the lower would have said on it, if it …Pre Ban Colt Ar 15 Serial Numbers. This semi-automatic action was chambered in the.223 or the 5.56 NATO caliber and is a gas operated rotating bolt which sits in the aluminum receiver. Additionally, the feed system on the AR 15 is a box magazine with varying capacities and various aftermarket manufacturers. The AR 15 comes in a wide array of ...24,757. Determining the year a Colt firearm was manufactured is not possible by knowing only the serial number. Colt has manufactured literally millions of firearms. Generally, Colt assigns a separate serial number sequence to each of its models. Sometimes the sequence for a specific model starts at the number “1″ and sometimes at a higher ...Colt has issued a Recall for certain Colt AR-type rifles made in 2021. Here is the official Recall Notice: COLT'S Manufacturing LLC (Colt) has recently discovered a potential safety issue with certain Modern Sporting Rifles ("MSRs"). ... Model Marking and Serial Numbers. AR-15 A4: CAR022851 - CAR023250 CARBINE: CR036354 - CR099599 ...The 'Carbine' Lower Appears. In an effort to streamline production and reduce production costs, Colt standardized the lower receiver markings to simply say 'Carbine Cal. 5.56mm'. Above the text is the renowned 'Rampant Pony' that we know and love. Photograph of the new 'Carbine' lower receiver. Many committed Colt AR-15 fans did ...R6600 Serial numbers picks up were the SP1 left off, produced 1985-1990. Features are as such: CM upper forge code, big hole slab side lower, no sear block, no auto sear cut in upper, small pin hammer/trigger pins, modern small forward assist, SP1 bolt carrier, bolt marked MPC with a space between the M and the P, blue extractor buffer, AR-15 A2 HBAR SPORTER, lower roll marked COLT’S FIREARM ...The highest serial number known to be in the wild is GS 0092xx. GC (Government Carbine)-- 18,500 Colt Model 6520 AR-15A2 Government Model Carbine (1988-) ... Colt Model 6010 AR-15 Sporter (SP1 in .222 REM for countries that ban mil. calibers) Colt Model 6500 AR-15A2 Sporter II (1984 - )VERY rare Colt orig Green label R6550 government service model serial GS007xxx. These GS serials where not meant to be civilianised or sold to the public. There is not a true number of how many of these actually got out there to civilians. This has less than 80 rounds fired total. Colt AR-15 A2 Government model.

Aug 16, 2007 · The same reference says that for Colt AR-15 Sporter I rifles with S/Ns between. SP02501 and SP00101 were manufactured in 1965. The examples shown, clearly show the "SP" prefix however and not MH, so I don't think this date applies to your situation. There are others who post regularly who obviously have access to much more info than I who can ...

In late 2011 the last 100 units of the LE6920 with Colt's Law Enforcement Carbine, LE restricted markings and official factory letter of authenticity was released to the market. However in Dec 2013 they released the actual 105 last units of same marked carbines but without the factory letter, with higher serial numbers as the official lettered ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Warning . ... I have noticed some Colt Carbines for sale on AuctionArms.com whose serial numbers start with "LGC". I am familiar with the pre-ban carbines that whose serial numbers started with "CC" or "GC" but am not familiar ...We would like to show you a description here but the site won't allow us.289K subscribers in the ar15 community. Welcome to r/AR15! Share you builds, ask relevant questions, play nice etc. ... Picked up this Colt gov't carbine today. Serial number starts with LGC. Barrel stamped 05/04. It's post ban, but is the 05/04 when it was built? ... Colt serial lookup.Contents [ show] Where can I find the serial number on my Colt AR-15? The serial number is usually located on the lower receiver of the gun. Are Colt AR-15 serial …Colt AR-15 Match Target Compition 20" Compensator. $ 6543.21. OUT OF STOCK. Remove from Compare. Add to Compare. This product has an average rating of 5.00 stars out of 5 stars from 3 ratings. (3) Colt AR-15 Match Target H-Bar 20" .223.3 posts · Joined 2023. #1 · Oct 25, 2023. As we all know, a First Generation Colt SAA will have the serial number in three places, the bottom of the frame, the bottom of the trigger housing, and the bottom of the grip. As we also know, the vast majority of the so called "Artillery" models that were reworked into the configuration by Colt ...The 2 position Colt stocks with vinyl acetate aluminum buts art a small fortune, like $400+. SP123040 is late 70s or early 80s. "SP1" is not a prefix, "SP" is the prefix. ETA: 1980 according to the arf SP1 database.I saw a Colt AR15 at a gun show yesterday, lower marked "Colt Tactical Carbine, Serial number LBD004xxx". Other side marked "Restricted Military/Government Law Enforcement/Export Use Only". Straight heavy barrel marked "CMP 5.56 NATO 1/9 HBAR. Flat top upper with removable handle, 4 position collapsible stock, tactical sling, tritium front post.Pre ban AR-15 serial numbers are unique sets of markings found on rifles manufactured before September 1994. These special formatting rules include alpha numeric combinations with specific letter prefix codes such as SP1, XM15 etc. Pre ban rifles usually have a "COLT AR-15" roll-mark or in some cases the older "AR-15" designation.

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Foreign Service Models: 1) Colt M1911 Canadian Contract: S/N C5400 to C16599 = Sept. to Nov., 1914 ( Only 5000 pistols in this serial number range were shipped to Canada.) Caliber .45 ACP. 2) Colt M1911A1 Canadian Contract: S/N 930,000 to 936,000 = 1943 ( 1,515 military model pistols were shipped to Canada through the Lend-Leased Act from this ...Colt Sporter Match HBAR, Serial number Prefix MH, purchased new in 1991. Rifle has flash hider and no bayonet lug. Chrome lined barrel with less than 100 rds fired. My brother that lives in PA wants to sell this rifle and asked me what it was worth. I've never been a big AR 15 fan although I have several and couldn't tell him.Get ratings and reviews for the top 11 moving companies in Sherwood, AR. Helping you find the best moving companies for the job. Expert Advice On Improving Your Home All Projects F..."Colt's completed its first-ever run of 300 "model 01" AR-15 rifles, serial nos. 000101 to 000400, in December of 1959. Already Bobby McDonald was doing his part: in his later Ichord testimony he reported that "...the first [Colt AR-15] rifles that were ever sold were sold to Malaya, 25 rifles, and they were shipped under State Department ...Finally, BATF has allowed some pre-ban damaged to be replaced with post-ban lowers with numbers outside the ranges given below while retaining the grandfathered status. They will send a letter documenting this and allowing the original manufacturer to proceed with the replacement. Colt ( 800) 962-COLT. Year. Serial Number Range. Pre Ban. Post Ban.So you have to do your research on what you want. Remember Colt didn't make a lot of these guns. In the LGC serial number series that runs basically the late 90's to 2011, we are talking 45 to 46,000 rifles. They stop production sometime and late 2010 or 2011. Those later guns would be in the 44 through 46000 serial numbers. Hope that …Because of the jumbled numbers, call Krista and she can tell you what status the rifle had when they last saw it. Colt - Colt's Manufacturing P.O. Box 1868 Hartford, CT 06144 (203)-236-6311 "Randy" All "Match Target" rifles are Post-ban. Colt actually has serial number cutoffs, these are the last Pre-ban numbers in each series:A Colt AR-15 serial number is a unique identifier that is assigned to each weapon produced by the manufacturer, Colt. The serial number serves as an essential tool for tracking the ownership of firearms, especially in cases where weapons are stolen or used in criminal activities. The importance of the Colt AR-15 serial number lies in its ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Warning . Close. Confirm Action. Are you sure you wish to do this? ... What year is my Colt, serial number :9379XXX Posted: 6/5/2006 9:39:51 AM EDT [#7] Quoted: What year is my Colt, serial number :9379XXX. 1978 ...#1 · Dec 26, 2019 (Edited) I've been in the market for a "new to me" Colt AR, specifically any of the "LE" versions. As I understand it any Colt AR that starts with for example …Buy a COLT MFG CO INC SP1 Colt AR15 SP1 manufactured in 1978. Shot once and stored since. Unique serial number of SP99000. for sale by David Olhasso on GunsAmerica.com the best online marketplace for buying and selling semi auto pistols, firearms, accessories, and collectibles : 962580751 ….

I am in the processing researching a Colt AR-15 Modal SP1 . Serial number SP196898. Can anyone please help me identify the year of manufacture of this rifle? ... A forum community dedicated to Colt firearm owners and enthusiasts. Come join the discussion about performance, gunsmithing, troubleshooting, reviews, accessories, classifieds, and ...Colt used left over serial numbers in the Model 602 range to build commercial select fire AR15s that had the features of the 603. They were marked AR-15, Cal. .223. Mine was sn 039882. So, Colt commercial guns seem like an odd mix and afterthought when compared to the various distinct military models.Dating my AR-15 A2 Gov't Carbine. Jump to Latest Follow ... Serial numbers before 18500 are pre-ban, (Sep 1994). Would guess yours is from 1989 or maybe 1990 at the latest. ... az_colt is correct, the GC prebans were '88-'94, you can letter them for date. These are basically a Colt model 723 ,M16A2 carbine ,non-NFA clone.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. ... Colt M4 and M4A1 Serial Number Range. ARCHIVED; Posted: 8/15/2021 2:30:53 PM EDT ... Just looking to see if someone has a general idea of what years and range of the serial numbers are. Thanks for any info. …Step 1: Go to https://www.colt.com/ Step 2: Hover the mouse to “Customer Service” Step 3: Click “Serial Number Lookup” Once you get to that page, enter all the characters and the numbers on your …Commercial/export CAR-15 series. 202,447-379,353. 1965. US Property marked US Air Force M16 Colt's Model 604, and a few commercial export models. There are also examples of commerical/export marked models using the 20X,XXX serial number range produced in the late 1960's. 400,000 series. 1966-1973 or so.May 25, 2019 · There are a lot of ways for you to lookup serial numbers the firearms nowadays. In the case of Colt serial numbers, you have up to 3 available choices to choose from depending on your preference: Serial number lookup Letter of authenticity ; Manual search; Serial Number Lookup Colt ar-15 serial numbers, 289K subscribers in the ar15 community. Welcome to r/AR15! Share you builds, ask relevant questions, play nice etc. ... Picked up this Colt gov't carbine today. Serial number starts with LGC. Barrel stamped 05/04. It's post ban, but is the 05/04 when it was built? ... Colt serial lookup., Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear., The following is a general breakdown by serial number of major types model 03, 04, SMG, model 613 and Lebanon rifles. Starting S/N 101 through 14,484. For General Curtis LeMay (AR15)., 3. Recently some serial numbers have left with one or two letters followed by FIVE numbers. The last numbers are either 5's or 0's. 99.9% of these are post-ban. 4. "Older" does not always mean pre-ban as per Corey Sattler. 5. "BL" serial number series lowers are transitional with some pre and some post ban., Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear., So you have to do your research on what you want. Remember Colt didn't make a lot of these guns. In the LGC serial number series that runs basically the late 90's to 2011, we are talking 45 to 46,000 rifles. They stop production sometime and late 2010 or 2011. Those later guns would be in the 44 through 46000 serial numbers. Hope that helps.", 24,757. Determining the year a Colt firearm was manufactured is not possible by knowing only the serial number. Colt has manufactured literally millions of firearms. Generally, Colt assigns a separate serial number sequence to each of its models. Sometimes the sequence for a specific model starts at the number “1″ and sometimes at a higher ..., Identification of Colt M4 model. Stopped by a local big box gun store and came across a used Colt M4. The lower is marked M4 with an LE prefix on the serial number, and it has the QR-code looking mark. The barrel itself is stamped "C," though the bolt carrier is not and the bolt just has "MP.". What has thrown me off, though, is the ..., Yes, the lower receiver of an AR is serialized, and is the actual firearm. ARs parts are also modular, and interchangeable, and the parts come right in the mail. The lower is the only thing that you must purchase through your FFL. I think the manufacturers put the serial numbers on firing control units found on lowers., Oct 11, 2015 · I'm no expert but most of the Colt AR-15A2 Gov't Model rifles I had seen have the GS serial number prefix. Here's a site that ties the GS prefix to the Gov't Model rifle. Colt AR-15 Serial Number List. Colt AR-15 Sporter SP1 rifle owner since 1971. Colt 1911 Government Model Series 80 .45 pistol owner since 1984. Colt M4 Carbine owner since 2011. , Colt a2 gov carbine pre ban, colt ar 15 a2 gov pre ban. Colt ar-15 a2 gov't carbine serial numbers, colt ar-15 a2 r6550, colt ar15 a2 government model. Colt Serial Number List and. The year/serial numbers under Colt SP series was forwarded to me by an individual whose return. (thus not a complete rifle). Colt AR-15 A2 Sporter manufacture date., Serial ports have been an important I/O tool for decades. Learn how they work! Advertisement Considered to be one of the most basic external connections to a computer, the serial p..., 5161 posts · Joined 2009. #9 · May 18, 2010. Full stock 20" or collapsible 16"? Depending on condition and what it has with it, I would say $700-$1000 for the 20" guns. In pristine condition, they are worth around $1200. Collapsible SP1 CAR-15's are not worth much more than that. Say between $700-$1200. American ME!, Many products you have in your home have unique serial numbers printed on them. Companies assign serial numbers to their products. If you ever have to contact a company regarding a..., I’ve assembled a short list of many of the manufacturers of AR-15 rifles and clones. Also included is the person that you can speak with if you need information on a specific serial number. , Newbie to this but how does one figure out when his rifle was manufactured if it is possible. Mine is a A2 SP 31805x and is supposed to be preban. That is, mine has 6 digits These are 5 digits prior written here Colt AR-15 Serial Number List, Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Warning ... Serial number SP249xxx. If the gun is in very good condition and not molested I would think the price is fair. Posted: 3/3/2016 3:14:51 PM EDT ... Bought my 5 digit serial # colt hbar four or so years ago for $1,100 ..., The following is a general breakdown by serial number of major types model 03, 04, SMG, model 613 and Lebanon rifles. Starting S/N 101 through 14,484. For General Curtis LeMay (AR15). 14,500 through 14,916 for S.A.W.S. Contract (AR15) 15,000 through 99,999 for Air Force — Model 04. 100,000 through 199,999 for Army — Model 03., Colt AR15 M203 Gernade Type 37MM Flare, Smoke, ... Category - Flare Guns - Colt Rifles - AR-15. Category Flare Guns Colt Rifles - AR-15. Seller's Information ... Serial Number: None Caliber Info: 37MM Condition: VGC . See all listings by democat973 Print this listing. Click Photo to Enlarge:, The lower receiver has the Colt four line makings with the four digit serial number "SP01125" indicating production in mid/late 1964, the first full year of Colt AR 15 production. It is fitted with the early original Colt marked parts such as the original non-chrome lined barrel, stamped "12" on the front underside, indicating it has the early ..., USGI SERIAL NUMBER DATA BASE (serial numbers listed in chronological rather then numerical order): 101-14,484 1959-1963 US Air Force/Project AGILE/SEAL issue Colt's AR-15 Model 601, roll marked ARMALITE. Some sold commercially to police departments, small numbers to foreign militaries such as Malaya, India, Australia, Burma, and Singapore ..., Here's how we made those cool AR models. We’ve heard it all before—some new, groundbreaking technology is going to change the way we live and work. In fact, we’ve heard these claim..., Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. ... . It is a compilation of both personal information and information submitted from others from the Internet. ALL SERIAL NUMBERS SHOULD BE VERIFIED FROM THE MANUFACTURER PRIOR TO ANY PURCHASE OR ASSEMBLY. ... Colt 800-962-COLT ..., What year was colt ar-15 serial number sp98281 manufactured? Updated: 9/17/2023. Wiki User. ∙ 13y ago. Study now. See answer (1) Best Answer. Copy. About 1978 or 1979., Colt AR-15 Identification Guide - Internet Movie Firearms Database - Guns in Movies, TV and Video Games. This page is intended as a guide to identify the various Colt …, Colt a2 gov carbine pre ban, colt ar 15 a2 gov pre ban. Colt ar-15 a2 gov't carbine serial numbers, colt ar-15 a2 r6550, colt ar15 a2 government model. Colt Serial Number List and. The year/serial numbers under Colt SP series was forwarded to me by an individual whose return. (thus not a complete rifle). Colt AR-15 A2 Sporter manufacture date., SP1 Rifle 1968-1969 - The Colt AR-15 Resource. SP1 Rifle 1968-1969. This SP1 rifle was seen for sale on Gunbroker February 2019. Sale price was $2500.00. Serial date has it as a rifle from 1968-1969., AR15_1911. Your birth plastic bag is probably correct because the published pre-ban serial number in Sept. 1994 was MH086020 and below. There was another barrel marking under the handguards behind the front sight base but unfortunately Colt started it in 1995, so yours wont have it. You could call Colt but they might have it or not, maybe just ..., Aug 23, 2022 · NOTES: The serial numbers listed, except for 1963, 1969, 1970, are the serial number at the first of the year. NOTE II: The 1969-1970 downturn (highlighted in purple) in production numbers is due to Colt withdrawing the AR-15 from the market temporarily to fix the "hammer follow-down" issue (the gun could fire full-automatically -- erratically -- if the disconnector was removed). , Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Warning . Close. Confirm Action. Are you sure you wish to do this? ... What year is my Colt, serial number :9379XXX Posted: 6/5/2006 9:39:51 AM EDT [#7] Quoted: What year is my Colt, serial number :9379XXX. 1978 ..., Colt 800-962-COLT. CC001616 and Below - Pre-Ban. CH019500 and Below - Pre-Ban. GC018500 and Below - Pre-Ban., Aug 23, 2022 · NOTES: The serial numbers listed, except for 1963, 1969, 1970, are the serial number at the first of the year. NOTE II: The 1969-1970 downturn (highlighted in purple) in production numbers is due to Colt withdrawing the AR-15 from the market temporarily to fix the "hammer follow-down" issue (the gun could fire full-automatically -- erratically -- if the disconnector was removed). , AR15_1911. 1519 posts · Joined 2013. #5 · Sep 1, 2022. Your Colt AR6721 AR-15A3 Tactical Carbine's prefix serial number LBD is typical to post ban made carbines. Before the ban in 1994 that model had the prefix of BD, the L prefix means Law Enforcement which this model was sold together with the other Law Enforcement series carbines.