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)