https://www.atlanticfirearms.com/co...olt-6721-ar15-a3-carbine-detail.html?Itemid=0
Looks like a very good deal on a hard to find rifle.
Just passing on the info.
Looks like a very good deal on a hard to find rifle.
Just passing on the info.
Heads Up: Colt 6721 under $900
- Thread starter Dr.Rob
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Jackal
Member
Agreed, thats where I got mine.
The 6721 is the same rifle, but with a silly HBAR barrel. HBAR is kinda goofy in a carbine....
Old Dog
Member
Darn it, I missed that. Been looking for a mate for my old Lightweight Sporter. The 6720 is an awesome patrol rifle and just a handy little light carbine for knocking about.
Dave Markowitz
Member
Not quite. The 6721 has a 1:9 twist while the 6720 has a 1:7 twist. Unless you shoot bullets heavier than 62 grains the 1:7 is of no practical advantage.
I have a 6721 and a 6520 (1:7 twist, light barrel, A2 upper). The 6721 is easier to keep on target in rapid fire due to the heavier barrel. If I had to carry it a long distance, I'd take the 6520, though.
I know nothing about AR-15 except that there are ton of generic (non-Colt) companies making them. What is special about that model and why is it difficult to find?
It's difficult to find because the market for heavy-barreled carbines is small, and most folks want 1:7 twist for their carbines (to shoot a wider variety of defensive and plinking ammo).
For most carbine buyers, the 6920 (with 1:7 twist M4 profile barrel) or the 6720 (with 1:7 twist lightweight barrel) are going to be more desirable choices.
FWIW, my Colt HBAR Carbine 1:9 was a great shooter and quite capable of printing impressive half to three quarter inch groups with a good scope and quality handloads. I have never been able to duplicate that performance with any M4 or thin barreled AR.
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