Not a drop in barrel. period. - Lone Wolf Arms AlphaWolf Barrel For M/42 Conversion to 9x18 Makarov

Be prepared to either have this barrel fitted. The slide will get stuck in the back position, you can feel the grind leading up to the sieze. I performed some filing (wait until you see what's necessary) PLUS and this is a BIG PLUS! the ramp will need to be reshaped to accommodate the fatter round entering the chamber at that angle. Otherwise, it is FTF city! This barrel requires improvements before being sold to the public. Especially if intended for self defense. Optics Planet, I love you guys but please put this barrel in a 42 and see if you can fire off 1 magazine of 9x18's. Then I think you'll pull this product from your shelves until they get their act together.