Home Forums Hunting & Shooting AR and Tactical Rifles The M4, why 14.5"

While not as exact as cutting the same barrel down but we chronographed Colt barrels with M193 and the 14.5” barrel was 80something fps slower than the 16” barrel. And the 16” was almost 100 fps slower than the 20”.

I’ll take the 16” barrel, if I need shorter, I’ll go 11.5”.