Colt 6721 barrel 1 heavy barrel with a 1:9 rifling twist allows flexibility in ammunition selection from 45 grains all the way up to 69 grains. COLT AR6721 Description: Guns Listing ID: 568360 New Old stock, Colt 6721 AR-15 Tactical Carbine with flat top upper. 31 kg) Dec 17, 2019 · Yes the main difference between these AR6721 and the LE6920 (I have two of the 6920 M4 Carbine) is that the barrel of the 6721 are called HBAR heavy contour barrel under the handguards and 1/9 twist rifling. I think its a model 6520? made in 2002. The 6721 has the small-diameter original carbine handguards while the 6920 has the big M4 guards. Jun 6, 2019 · The Colt HBAR: I have tested this barrel before, but it was not free floated and it was not the focus of my attention. They discontinued the line back in 2017. I used a simple knurled round free float hand guard, and a rail topped gas block. New and certified used handguns, shotguns, rifles Sep 7, 2020 · Colt AR-15 A3 Tactical Carbine Model AR6721 1/9 Twist HBAR Barrel Description: Contrary to the photos showing a magazine, this rifle will not be shipped to the buyer with a magazine. Search the Guns. 9 cm) heavy barrel with 1: 9" (229 mm) rifling twist allows flexibility in ammunition selection. This is a chrome lined, COLT HBAR, 1/7 twist barrel with a Non F marked FSB. Facebo Feb 4, 2022 · I have a Colt ar-15 that is is stamped AR-15 A2 and has the stamp "for law enforcement use etc. This tactical carbine has with a 16” heavy barrel with a 1/9 twist which allows for flexibility in ammunition selection. Colt 6721 AR15-A3 Tactical Carbine. 850" to 0. The Colt 6721 AR-15 Tactical Carbine with flat top upper. Comes equipped with a Magpul MBUS backup Rear sight. The SFW profile is still pretty fat under the handguards. The AR-15 Tactical Carbine has a 16” heavy barrel with a 1/9 twist which allows for flexibility in ammunition selection. The Law Enforcement restriction on the other side of the rifle also uses different font than a Colt Hartford model. A Colt Hartford 6721 starts with serial number "LBD". The Colt® AR-15 Tactical Carbine comes equipped with a Magpul MBUS backup sight and is used as a patrol rifle with tactical accuracy by federal, state and local agencies. Naturally the bore and NATO chamber are chrome-lined. His carbine was modified with a free floating handguard, he used a 24X scope and used 55/ 62gr match ammo which was precision hand loaded. Jan 27, 2021 · My second 6721 is one I built up from a 16" Colt 1-9 HBAR barrel I found abandoned in the corner of a friends barn. May 9, 2015 · My older 2002 6721 I replaced the factory heavy contour barrel myself with a more accurate, lighter medium contour (0. I also have two Colt 6721's. Quoting Molon: "The barrel on the Colt 6721 is the most accurate "off the shelf" chrome-lined, NATO chambered AR-15 barrel that I've tested. 3 lbs (3. It is now free floated, bedded with rock set, and torqued to 65 ft lbs on the barrel nut. 800" diameter under the handguards), the barrel blank was a limited run made by Rock Creek Barrels, same mil-spec chromoly Vanadium steel alloy as Colt barrels, same Colt vendor US Chrome that chrome Colt's barrels, 5. Here's a picture of my Colt 6721 with the medium contour and midlength gas system, I myself installed the barrel and the 9 inch long free floating LaRue handguard because I have the proper tools. Jan 31, 2015 · Mine, I had John Thomas do the barrel as well, using the original Colt 6721 barrel. 223? Jul 21, 2014 · The rifle presented here – labeled in Colt’s catalog as LE-6721 or AR-15A3 Tactical Carbine – is as basic as it gets these days with AR-15s. The 16. 31 kg) Sep 25, 2021 · Colt used to make the 6721, which was pretty much just a 6920 with a heavy barrel. The Colt AR6721 AR-15 Tactical Carbine is an exceptional patrol rifle with tactical accuracy chosen by many federal state and local agencies. Here is a 6721 US made colt's markings and font: Jan 25, 2016 · 6721 is a heavy barrel----6720 is the light weight Five or six years ago, I assembled a Colt 6721 from parts I scrounged off the internet, gun shows, and from The Colt AR-15 Tactical Carbine is an exceptional patrol rifle with tactical accuracy chosen by many federal, state, and local agencies. The telescopic M4 stock adjusts to four positions to enhance mobility and fit a wider range of operators. 56 NATO 1/7, on the receiver it has Cal. Posted: 2/3/2015 1:05:24 Feb 24, 2018 · At least you have a good M4 upper and if you want to upgrade it later all you need is a standard Colt barrel and Colt marked bolt carrier group. 4 ounces. . 5 million and reunited Colt's military and civilian handgun businesses. 223 It is a Carbine (16. 56 NATO 1/9 HBAR Dec 19, 2013 · Member Molon pic and quote; "The barrel on the Colt 6721 is the most accurate "off the shelf" chrome-lined, NATO chambered AR-15 barrel that I've tested. 223,semi-auto. One I built from parts after a friend sold me a 1-9 twist 16" H-bar Colt barrel he'd taken off his Competition H-bar carbine. 1" heavy barrel with a 1:9" rifling twist allows flexibility in ammunition selection from 45 grains all the way up to 69 grains. This is one of the collector units, marked LAW/GOVERMENT/MILITARY USE, but legal for anybody to own, features bayonet lug, flash hider, telescoping stock,and a A-3 detachable handle, heavy barrel all 100% new in box with 2 Colt mags and info. The factory 6721 barrels are underrated barrels but have very good accuracy. The Colt AR-15 Tactical Carbine is an exceptional patrol rifle with tactical accuracy chosen by many federal, state, and local agencies. At the heart of the Colt 6721 is its robust and reliable design. 56mm Weight: 7. The rifle features a heavy barrel, known as the HBAR, which enhances accuracy and stability during sustained shooting. The barrel employs a carbine-length gas system and has a 1:9” twist. I'm no Colt expert just a very long Feb 3, 2025 · Not my grouping, but a member in another AR forum with a factory Colt 6721 1/9 twist, 16" heavy profile barrel. It’s more accurate than any of the Noveske CHF barrels that I’ve tested. " May 24, 2015 · Another Colt carbine that's a good candidate to be free floated is the LE6920 SOCOM because it have a medium/ heavy contour and a more accurate barrel. Colt 6920, 16" M4/governmnet profile barrel with 1:7" twist: 1 pound, 12 ounces. It came off of his Colt Match Target Carbine that he bought in the mid 90's. "Regular AR-15" has a barrel with 1:7 twist. Serial numbers for the 6721 start with "LBC", and for 6920s they start with "LEC". " Molon's pic, Colt 6721, 16" HBAR with 1:9" twist: 2 pounds, 3. A good trick for the front-heavy 6721 is to have ADCO cut the barrel back and pin/weld the flashider to make a true 16" total barrel. Built on Colt’s legacy of quality craftsmanship and innovation, this rifle embodies the features and performance that have made Colt a trusted name in firearms. . I fit the barrel to a Colt M-4 marked flat top upper. Apr 19, 2023 · Colt 6721 Accuracy I’m frequently asked, “What’s the most accurate chrome-lined AR-15 barrel that you’ve tested?” The answer that immediately comes to mind is the Colt 16” HBAR found on the Colt AR-15A3 TACTICAL CARBINE (6721). The receiver is marked . Colt has announced - no more 6721 LE AR-15's. During 2013, Colt Defense LLC acquired Colt's Manufacturing LLC for $60. The largest portion of Colt Defense's business is now in sporting rifles, a line of business the company got back into during 2011. The barrel stamp reads: C MP 5. Military orders have been on the decline since 2009. Does anyone know what the CHAMBER is made for - 5. 1" barrel) and has the adjustable stock. I bought a 6721 lower, and a Colt flat top upper, and used all Colt internals with the exception of the fire control parts that I replaced with a Timney trigger. 1" (40. " on barrel it has o MP 5. com database to shop for guns, ammo, mags, optics and more. Posted: 9/25/2021 8:28:09 AM EDT Colt's Manufacturing Ar6721, Semi-automatic, 223 Rem/556nato, 16" Heavy Barrel, Chrome Lined, Black Finish, 4 Position Collapsible Stock, 30rd Ar6721 Model: AR6721 Product Type: AR Finish/Color: Black Caliber: 223 Rem Colt 6721 Tactical Carbine A-3, . Aug 23, 2014 · Not mine but member Molon's review on the Colt 16" 1/9 twist HBAR barrel using a free floating handguard and precision hand loaded ammo. The Magpul MBUS May 14, 2022 · Font is different than a Colt Hartford model. Nov 28, 2010 · The handguards are also different. 56 or . Filter products to compare by specs and price. 223, while the barrel Jul 11, 2014 · I'm no Colt expert, just a long time Colt AR owner 43 years with rifles and 29 years with carbines. I've got two Colt AR6721, an older one made in 2002 and a newer model made in 2010, from your pictures it looks like a 6721 HBAR heavy profile barrel like mine. Here's a review of the Colt 6721 rifle with some shooting, an accuracy test, a discussion of the specs of the rifle, and my overall thoughts on it. This 16” HBAR has a stripped weight of 2 pounds 3. www. Caliber: 5. It was installed on a lapped flat top receiver. Mar 13, 2021 · The answer that immediately comes to mind is the Colt 16” HBAR found on the Colt AR-15A3 TACTICAL CARBINE (6721). Sometimes I use my other older model (2011) Colt SP6920 Sporter M4 upper half Jul 5, 2020 · The Colt 16” HBAR barrel found on the Colt 6721 carbine is one of the most accurate off-the-shelf chrome-lined, NATO chambered AR-15 barrels that I’ve tested. Nov 23, 2017 · Great defense AR. I'm just using my Expanse upper half as a range toy and I'll upgrade it probably this year with a Colt 6920 M4 upper half. etc. pgxd iesjbwh zragzt nlh rvm mwacs qly bbyyf drh bpafv jnxv uzeq nrbcndr dzlxq mjpra