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Old September 12, 2012, 10:32 PM   #1
iraiam
Senior Member
 
Join Date: September 6, 2012
Location: Lakewood, CO
Posts: 875
In the market for a 5.56 Carbine

I'm not new to the AR Platform, I own two rifles; an older colt SP1, and a Colt match grade A2.

But now I want a Carbine, I think I have settled on the Colt M4 Carbine, I kind of like the Colt. I was a little surprised to see it had a 1/7" twist though.

My NM rifle has a 1/7 also, it shoots 75-77 grain bullets extremely well, 55 grain not so much.

What is the standard for Carbine ammo? (if any)
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