The Magpul PMAGA(R) 40 AR/M4 Gen M3 40-rd. Magazine combines outstanding features with new material technology and manufacturing processes to provide reliability and durability that exceeds military specs. Fits AR-15 and M4 rifles and pistols Reinforced all-polymer construction Modified dimensions allow for wider compatibility with non Colt-spec platforms 4-way anti-tilt, self-lubricating polymer follower reduces friction, increases reliability Constant-curve body for smooth feeding Easy to disassemble flared floor plate, slim to fit double and triple pouches Long-life stainless steel spring Redesigned bolt catch notch provides increased bolt catch clearance Over-travel insertion stop on the spine Low-profile ribs and ront and rear texture provide better handling Paint pen dot matrix panels on the bottom of the body for identification marking Made in USA Note: Dust cover not included, sold separately