Swapping out Handguards on my STAG 15 Retro

[mrclark303]

Interesting, so the barrel is heavy profile to the 'A' sight/ gas block and then reverts to standard profile.

Would I be right in saying (from dimming memory) that the A2 HBAR had a heavy profile to the flash eliminator, with a different 'A' block?

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[browningautorifle]

the barrel is heavy profile to the 'A' sight/ gas block and then reverts to standard profile.

No...it's heavy all the way up. Have a look at any early M16 for comparison.

[RCS]

The Colt 606 heavy barrel was designed for automatic fire and the first attempt to use a heavy barrel on the AR-15/M16 receiver. The twist was 1 in 12 on the barrel.

I have fired this barrel at 100 yards slow fire using a Colt Sporter SP1 semi auto lower made in 1974. Accuracy was the same as the light barrel.

I think these Colt 606 uppers are not common as I really have seen too many over the last twenty yearsAttachment 112100Attachment 112101Attachment 112102