ProMag RM40 40-round detachable magazine for AR-15 rifles in 5.56mm. Features anti-tilt roller follower, DuPont Zytel polymer construction, and chrome silicone spring. Made in the USA.
Fits: AR-15
The ProMag RM40 is a high-capacity detachable magazine engineered for AR-15 rifles chambered in 5.56mm NATO. This 40-round magazine combines proven reliability with innovative feed technology.
The roller follower technology is the standout feature of this magazine. By reducing friction between the ammunition stack and the magazine body, it ensures consistent feeding reliability. This is particularly valuable during high-volume shooting sessions or tactical training where magazine performance is critical.
Whether you're building a spare magazine collection, replacing worn units, or stocking up for regular range sessions, the ProMag RM40 offers dependable performance at a practical price point.