The Corps chose the Mk22 Mod 0 Advanced Sniper Rifle, manufactured by Barrett Firearms, a company widely known for their groundbreaking work in developing the .50 caliber sniper rifle, as a ...
A rifle’s barrel is very important ... They’re button rifled and are available from .17- to .50-caliber, unfinished, unthreaded, and unchambered, or ready for installation.