Thanks, My 20" has a 1:7 my 10.5" has a 1:9 am leaning toward a 1:7 for my 16" M4 style build.
ar rifle barrel twist?
What are the advantages/ disadvantages of the 1:7 1:8 and 1:9 rate of twist in 223 ar's. How about bullet weight to rate of twist?
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