Technical Information Generation 3 with Window Caliber: 223 Remington / 5.56x45mm NATO Body Material: Polymer Follower: 4-Way Anti-Tilt Spring: USGI-Spec Stainless Steel Floorplate: Polymer, Low Profile Extras: Dust Cover, Dot Matrix Identification Panels, Over-Insertion Stop Made in U.S.A The Magpul PMAG 30 AR/M4 GEN M3 Magazine is a 30-round 5.56 NATO/223 REM magazine for use with AR15/M4 compatible firearms. A self-lubricating follower and stainless steel spring in this PMAG magazine ensure smooth feeding, while the impact-resistant polymer housing offers enhanced strength and durability. An over-travel stop on the spine of this 30-round magazine positively seats the magazine and ensures it will not over-insert for maximum reliability. A ribbed gripping surface and slimline floorplate aid in magazine handling. Made in the USA, the Magpul PMAG 30 AR/M4 GEN M3 Magazine is built for reliability and offers easy control with consistently smooth feeding.