FM-9 replacement mag block assembly
The mag block assembly comes fully assembled ready to drop in and start using,
The ejector is made from 4140 chromoly steel, QPQ nitrided to 70 HRC and securly
fastened to the mag block ready for use.
The belt bag retaining detent is also securely pressed into place ready to hold
your 150 round belt bag in place through the toughest firing conditions.