This American-made 30 round polymer magazine by Magtech accepts both 223 Rem and 5.56 NATO cartridges and is compatible with AR-15 and M4 platform weapons. Strong and durable, the PMAG Gen M3 exceeds even the military’s most rigorous performance specifications, and it features a USGI-spec stainless steel spring which is certain to keep its elasticity for years to come. This magazine further features constant curve internal geometry that guarantees smooth feeding, a reliable anti-tilt and self-lubricating follower, over-travel insertion stop on its spine, and a ribbed gripping surface and textured front and rear for easy handling. The magazine’s paint pen dot matrix panels permit you to personalize it however you like, and its flared floorplate facilitates disassembly without needlessly widening its dimensions. Finally, this magazine’s pop-off dust cover protects your ammunition while in transit, making it fit for use even in rugged terrain characterized by dust, sand, and heavy vegetation.