Magpul M3 7.62 Nato 15/25 black window P-Mag. A 15 round limiter has been installed and the floorplate has been secured with a 1/8" rivet. Your choice of Magpul factory limiter or Magblock limiter for an additional $0.50.
It will work with rifles that use SR-25 style 7.62x51/.308 magazines, such as:
S&W MP-10, KAC SR25, DPMS LR308, LaRue OBR, LWRCI REPR, Bushmaster .308 ORC, LMT .308 MWS*, Remington R-25, POF P-308, JP Enterprises LRP-07, Les Baer .308, Colt 901-16S, the new Armalite AR-10A, and more.