Colt 6721 Barrel the "longer ones I've seen on newer factory Colt AR's), an M16 BCG group, and receiver has the LEO roll stamp. It's the most accurate off-the-shelf chrome-lined NATO chambered barrel that Colt has ever produced. Another Colt gets discontinued, not sure when, but just happened to be my first AR-15, the Colt AR-15A3 (6721 heavy barrel, 1:9 version) was just I bought a new 6721 not quite a year ago and it has the heavy barrel just like all the Colt literature said it should, I have never seen any other barrel profile offered on the 6721. They did have colt #6721 for $1200. Colt/DD barreled upper receiver up for sale. Three 10-shot groups fired from The 6721 heavy barrel carbine best group was under 0. The telescopic buttstock adjusts to four positions to enhance mobility and fit to a wider My LGS had a NIB Colt AR-6721 on his shelf last month and said he'd sell it to me for $850 plus 7% SC sales tax ($909). 5 M4 barrel and can't tell the difference between it and my LE6920. 156 pins on the 6721? I can't seem to find this info anywhere. Colt AR-15A3 (6721). 56 NATO 1/9 HBAR LBD 0165XX looks blackish Grey, old style I went into my local gun shop today looking for a colt 6520 but none was available without paying inflated $1500. The Colt model 6721 has caught my eye for some reason. It is used and I don't know the round count. COLT AR15 A3 TACTICAL CARBINE 6721 5. . Keep in mind that factors such as I have a new Colt 6721 HBAR coming in and I want to get rid of the post sight and install a longer fore-end anda gasblock to fit under it. 56 NATO, 30 ROUND MAGAZINE, HEAVY 16" BARREL, M4 Profile, Magpul MBUS Rear SIGHT, FACTORY NEW I'm no Colt expert, just a long time Colt AR owner 43 years with rifles and 29 years with carbines. Same rollmark on both Just purchased my first AR, a Colt 6721 Tactical. 56 16. Keep in mind that factors such I have an all-Colt 6721 (AR15A3 Tactical Carbine) which comes with 16" CAR-gas 1/9 HBAR barrel. Looking at purchasing a Colt Ar15 I am a novice collector of Colt firearms. 9" while the 6920 with standard government lightweight barrel under the handguards grouped Today we review the Colt 6721 HBAR AR-15. It's the HBAR version, one of the few still legal to purchase in my state. The rifle features a heavy barrel, known as the HBAR, which enhances accuracy and stability during Colt's Manufacturing AR6721, Semi-automatic, 223 Rem/556NATO, 16" Heavy Barrel, Chrome Lined, Black Finish, 4 Position Collapsible Stock, A3 Removable The 16. It has a chrome lined barrel with 6 grooves and a 1 in 9 right hand twist. Took it out and shot it immediately with 3 different kinds of ammo, pics of targets included (100m bench, Magpul BUIS), loves Federal Gold My older 6721 that I bought in 2005, I changed my barrel with a Rock Creek with longer midlength gas system, slightly lighter than the original HBAR, it's a medium barrel contour, same mil RIP. Facebo I'm about to pull the trigger on a new Colt 6721. His carbine was modified with a free Colt 6721 Tactical Carbine A-3, . First, these are roll marks I've been reading that this rifle comes with a HB. I want the 1/9 twist because it doesn't wear out as quickly as the 1/7 twist in I want to buy a Colt AR-15, and I am looking hard at the AR6721, the one with the 1/9 twist rate in the barrel. I can never keep track of Colt model numbers so I could be wrong, but as a general rule Colt's barrels with military I bought this barrel to build a Colt 6721 upper, but I just bought an entire rifle the other day so I no longer need this barrel. through 77 The Colt AR6721:AR15-A3 Tactical Carbine is used as a patrol rifle with tactical accuracy by federal, state and local agencies. But wouldn't a 1/7 be more flexible? Do you know in which application this rifle would be Not my grouping, but a member in another AR forum with a factory Colt 6721 1/9 twist, 16" heavy profile barrel. Replace the factory barrel assembly with a Noveske Does anyone know exactly when Colt switched over to the . I had not seen this model in the Colt catalogs starting in 2018, so they might COLT AR15 A3 TACTICAL CARBINE 6721 5. I would like to replace this barrel with a 1/7 non-HBAR 16" barrel with an F-marked FSB. 1" heavy barrel with a 1:9" rifling twist allows flexibility in At the heart of the Colt 6721 is its robust and reliable design. The heavy barreled 6720 will be opposite - a weight Colt Serial Number List and FAQ Above Information Courtesy Stokes I want to buy a Colt AR-15, and I am looking hard at the AR6721, the one with the 1/9 twist rate in the barrel. Did I think you are correct about the BCG, however I have learned that police trade-in weapons can be a mixmaster. Replace the factory barrel assembly with a Noveske stainless-steel Canadian barrels were Cold Hammer Forged and Chrome Lined. 290K subscribers in the ar15 community. His carbine was modified with a free COLT 6721 AR15-A3 TACTICAL CARBINE - AR15. 3lb, 32" collapsed and 35. 1" (40. It's a Colt 6721 AR-15 A3 Tactical Carbine. Step 1. Colt says : ” 16” heavy barrel with a 1/9 twist, which allows for flexibility in ammunition selection”. Step 1. It looks good with The Colt AR6721, an AR-15 A3 tactical carbine, is used as a patrol rifle with tactical accuracy by federal, state, and local agencies. I don’t really want an AR in this configuration (16" heavy barrel, 1:9 twist, A2 front sight base) and I’m How does it compare to the 6920? Does the difference in the barrel, 1 in 7 on the 6920 and mine, and 1 in 9 on the 6721, make that much difference in performance? Would one be more The 6721 model was released on 1994 before the ban, serial number BD 000134 and below are pre ban and are very collectible. 1″ heavy barrel with a 1:9 twist, which allows for I own a Colt 6721 rifle, and I would recommend that you purchase a complete Colt 6920 Law Enforcement Carbine instead. I know most of those buying a similar weapon have The 16” Colt HBAR found on the Colt 6721 is one of the most accurate “off the shelf” chrome-lined, NATO chambered AR-15 barrels that I’ve evaluated. With the appropriate bullets, I'm looking at a new buy and am considering the Colt 6920 and 6721, but can see much difference between them, except for the barrel cuts. Welcome to r/AR15! Share you builds, ask relevant questions, play nice etc. 1" heavy barrel with a 1:9" rifling twist allows flexibility in ammunition selection from 45 grains all the way up to 69 grains. 3lb, 32 collapsed and 35. Traded the barrel for a new in the bag Colt 14. I've not seen or obviously had a chance to measure I'm hoping to put together a more ideal (for me) Colt LE patrol rifle than the stock models. 293K subscribers in the ar15 community. I just received a 6721 and my charging handle and BCG were both NIB Colt AR-15 LE 6721 A3 Tactical Carbine AR15 for sale online. 56 mm ammo , 1:7 for 62gr NATO). 223,semi-auto. 9 cm) heavy barrel with 1 in 9" (229 mm) rifling twist allows flexibility in ammunition selection. They're a COLT AR-15A3, #AR6721, 223 / 5. Both the Colt 16" HBAR barrel assembly and I heavily modified this one with a new limited production midlength gas system (longer than carbine gas system but shorter than a rifle gas system), medium profile barrel, CMV mil-spec I think you got a deal. Conclusion: As you consider purchasing or selling a COLT TACTICAL CARBINE (AR6721), it's essential to stay informed about the current market prices and trends. Not my grouping, but a member in another AR forum with a factory Colt 6721 1/9 twist, 16" heavy profile barrel. The barrel looks a little on the heavy side, but still very portable I picked up a 6721 for $950 back in December. The 6920 will be lighter, and give you the ability to shoot anything from 50 gr. The AR6720 features a 16. Hartford barrels are button rifled and Chrome lined. Colt 6721 Tactical Carbine A-3, . 56x45 NATO AR6721 7. I want the 1/9 twist because it doesn't wear out as quickly as the 1/7 twist in Here's a best grouping pic of member Molon which I saved with his 6721 with free floating handguard and precision hand loads, he found out that it 10 votes, 43 comments. This 6721 has the the more "standard" style safety selector (vs. The telescopic M4 stock adjusts to four positions to enhance mobility and fit The Colt AR-15 Tactical Carbine is an exceptional patrol rifle with tactical accuracy chosen by many federal, state, and local agencies. I paid a lot Colt makes several LEO carbines. Is it more like a gov't profile type HB or is it really a bull type barrel under the hand guard? Does anyone have a pic of what the barrel looks ARCHIVED Posted: 12/15/2006 9:15:08 PM EDT OK I have a 6721 It is heavy (well its the heavy barrel so what do I expect) Got my first AR yesterday, finally. Do you know what the date stamp on the barrel of your "unmarked" 6721 was/is? Or have you ever called Colt to confirm when it was built? Do you have I’ve got a lightly used Colt 6721 with maybe 300 rounds brass case PMC 55gr through it. 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 I was messing around on Colt's websitewent there to look up what they list as the official weight on a couple of models. We take an out of the box rifle and compare it to another 6721 that has had basic, more user friendly and ergonomi Colt 5. I just picked up a Colt 6921 lower (14. I am working up a trade on one and the Serial # is LBD 334xx. 5in bbl w/ pinned muzzle attachment) with colt FA BCG and a free-float 12inch quad rail for $500, and as far as I'm concerned Conclusion: As you consider purchasing or selling a COLT AR-15A3 TACTICAL CARBINE (R-6721), it's essential to stay informed about the current market prices and trends. 1" HB 30+1 4Pos Stk Blk The Colt AR6721, an AR-15 A3 tactical carbine, is used as a patrol rifle with tactical accuracy by federal, state, and local You have a Colt model AR6721 AR-15A3 Tactical Carbine with HBAR heavy profile barrel under the handguards, since you have a bolt carrier cut all the way my guess is that it's made from 96 votes, 12 comments. He had $999 on the price tag. Colt AR6721 Ten-Step Transformation Start with a stock Colt AR-15 A3 Tactical Carbine (AKA a Colt AR6721) . I've got two Colt AR6721, an older one made in 2002 Hey all! I have been eyeing the Colt 6720 but my buddy was telling me the other day to not get the light barrel and instead get the government profile 6920. COM Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Colt 6920, 16" M4/governmnet profile barrel with 1:7" twist: 1 pound, 12 ounces. I've never used a forum before and I wasn't sure who else so ask about this. 00. The 16. But who's keeping [ARCHIVED THREAD] - Colt 6721 Barrel ? 12/15/2006 9:15:08 PM EDT OK I have a 6721 It is heavy (well its the heavy barrel so what do I expect) but also with the twist ammo is a pain Colt AR6721 Ten-Step TransformationStart with a stock Colt AR-15 A3 Tactical Carbine (AKA a Colt AR6721) . Barrel is a take off from a Colt 6721 paired with a DD upper. I noticed somethingthe AR6720 & AR6721 are nowhere to be found. Another Colt gets discontinued, not sure when, but just happened to be my first AR-15, the Colt AR-15A3 (6721 heavy barrel, 1:9 version) was just My older 6721 that I bought in 2005, I changed my barrel with a Rock Creek with longer midlength gas system, slightly lighter than the original HBAR, it's a medium barrel contour, same mil RIP. This is one of the collector units, marked LAW/GOVERMENT/MILITARY USE, but legal for anybody to own, For a Colt AR6721 barrel you are gonna pay around $300-$400. 5" extended direct gas AR Styled rifle. 5 extended direct gas AR Styled rifle. 56X45MM NATO for sale online. why would Colt do that when all their other barrels are 1-7? If you already have a 6920 and a 6720 (6720 is my favorite current I believe the 6721 is a 1/9 twist barrel, and the 6920 is a 1/7 twist barrel. In reviewing information here, I haven't seen any posting on this particular weapon. www. I liked it so I bought it. Is it more like a gov't profile type HB or is it really a bull type barrel under the hand guard? Does anyone have a pic of what the barrel looks Sounds like you're referring to a semi Colt 6721. I know The 6920 has the M4 style barrel cut, but are they diameters of the barrels on these two models otherwise the same? From looking at photos, it appeared to me that the 6721 might have a COLT'S PATENT FIRE ARMS MANUFACTURING COMPANY > AR-15 Tactical Carbine (Model #6721) AR-15 Tactical Carbine (Model #6721) Similar to above model, with exception of buttstock . Colt AR-15 A3 Tactical Carbine Model AR6721 1/9 Twist HBAR Barrel for sale online. Sorry if this is the wrong place/thing to post. It has a 16" heavy barrel with a 1:9" twist, which allows for flexibility in I've been reading that this rifle comes with a HB. What I'd like is 6721 with a lightweight 1x7 barrel, as used on the Colt 6520 carbine. Supposed to be a bit more COLT AR6721 for sale online. (all have collapbsible stock and 16" barrells w/suppressor and bayo lug) AR6520 - AR15/A2 "Government Model" carbine - light "pencil" barrell There's nothing odd about it. 4 ounces. But hey you never know Molon's pic, Colt 6721, 16" HBAR with 1:9" twist: 2 pounds, 3. As I have little use for a grenade launcher, these 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. He said the 6720 is not milspec, INC, no pinned in sear block, LEO roll markings, blue lable box, peel washer?, "T" numbers?, barrel marked C MP 5. . I've got two 6721 in my picture the top is an older made in 2002 but I heavily modified it even with a non Colt but a better quality barrel, the lower carbine is my newer made in 2010 which The 6721 has a 1-9 barrel which makes no sense to me. 1″ heavy barrel with a 1:9 twist, which allows for The Colt AR6721, an AR-15 A3 tactical carbine, is used as a patrol rifle with tactical accuracy by federal, state, and local agencies. The light barrel on the 6721 will give you better carry weight but will heat up under repeated fire - which can degrade your groups. I can get the Colt AR6721 Carbine AR-15 Semi-Auto 223/5. 1:9 twist, (between 1:12 for 55gr NATO 5. I wasn't really in the market for an What is the difference between the Colt 6920 compared to the Colt 6721 other than the 6721 has a heavy barrel and a 1x9 twist? That’s the basic difference. This is one of the collector units, Description 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 Colt 5. I've shot one of these, albeit a 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. Colt themselves were of no help. I'm no Colt expert just a very long The 6920 has the M4 profile barrel with a 1/7" twist, the 6721 has a 16" heavy barrel, with a 1/9" twist. 00 price tag. It came off of his Colt Match Thinking about another AR. Recently, I have been focusing on antique firearms, the Colt Pocket pistols Reply Quote Like Sort by Oldest first Yeah, Recce rifles to me are anything with 16-18 inch barrel, LPVO, FF hand rail, enhanced trigger, and adjustable stock, on an AR15 platform. The 1/7 twist rate and lighter barrel of the 6920 are both Jetsfan, Thanks for the info. \