Anangrypasta
Master
Might be a silly question, but do thread on barrel extensions affect muzzle velocity? Been interested in picking up a 9mm rifle with 16 inch total length "barrel," but it's actually a 5.5 inch barrel with a 10.5 pinned extension (the idea is to reduce the weight and change balance of the gun but make it rifle length). Does anyone have insight? I know 9mm isn't too shabby out of a longer barrel, the government said it's capable of blowing something.