How do blanks in the M1 Carbine work?
Blank adapting the M1 Carbine is a more intense and somewhat permanent process. It requires the barrel to be tapped. Tapping a barrel means drilling threads into the muzzle to accept an internal BFA. This is a permanent modification to the barrel. The process of tapping an M1 Carbine is however the most effective way to blank adapt your M1 Carbine for use at events. First off, your selection of a weapon to adapt is important. Nearly any barrel can be tapped and fitted for blank operation. An extensive “how-to” detailing the process can be found here. This should be done by a competent gunsmith with some milling experience. This modification to the barrel and will effect accuracy when shooting live ammo, especially when fired at distant targets. However, given the effective range of the carbine, target shooting with the weapon and effects on its accuracy should be of little worry. The major concern over this is weather or not you want to “ruin” an original WWII or Korean War era barrel