4-5x as much for the Mak ammo? Why be without the 1" at 25 yds accuracy of the 4" Buckmark? Gotta belt carry the Mak, can't pocket it like you can the M21. The Mak has ZERO more accuracy than does a smithed M21 (ie, 2" groups at 25 yds). Used Buckmark's a whole $50 more than the Mak, you can save that much on ammo in ONE day's practice (ie, 1000 rds).