Maxim Defense Industries PDX, Semi-automatic SBR, 300 Blackout, 5.5 Barrel, Flat Dark Earth (Arid) Finish, Maxim Defense Hatebrake, SCW Stock System, ALG Combat Trigger, 20Rd MXM-47824 The PDX dominates close-quarter encounters and achieves maximum energy on target. The PDX delivers groundbreaking power and performance in a subcompact platform.