Magpul M3 FDE Window magazine 30 round (AR-15) magpul while an over-travel stop on

while an over-travel stop on the spine helps ensure the magazine will not over-insert on compatible weapons

and 15rd indicator windows

Compatible Firearms: SIG SAUER P226

while giving you a 50% increase in magazine capacity in the same overall footprint

Magpul M3 FDE Window magazine 30 round (AR-15) magpul while an over-travel stop onThe next generation PMAG 30 GEN M3 Window is a 30 round 5. 56x45 NATO (. 223 Remington) polymer magazine for AR15 M4 compatible weapons that features transparent windows to allow rapid visual identification of approximate number of rounds remaining. Along with expanded feature set and compatibility, the GEN M3 Window incorporates new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed rigorous