ProMag RM40SL AR-15 Magazine 40-Round 5.56mm

ProMag RM40SL AR-15 Magazine

The ProMag RM40SL delivers reliable ammunition storage for your AR-15 platform rifle. This 40-round magazine combines proven design with American manufacturing standards.

Key Features

• Capacity: 40 rounds of 5.56mm ammunition
• Construction: Proprietary DuPont Zytel polymer body with over-molded stamped steel feed lips
• Follower: Patented anti-tilt roller design ensures smooth, reliable feeding
• Spring: Heat-treated chrome silicon wire for consistent performance and longevity
• Magazine Catch: Integrated steel catch for secure retention in your rifle
• Made in USA: Manufactured domestically with precision quality control

Why Choose This Magazine

ProMag magazines are engineered for shooters who demand reliability without compromise. The anti-tilt roller follower prevents binding and ensures rounds feed smoothly under all conditions. The proprietary polymer body resists impact and environmental stress, while the steel-lined feed lips withstand repeated loading cycles.

Every magazine undergoes rigorous quality checks throughout assembly to maintain consistent performance. ProMag backs this commitment with a lifetime warranty against manufacturer defects—a guarantee backed by decades of American manufacturing expertise.

Whether you're at the range, in competition, or training for defensive readiness, the RM40SL provides the dependable magazine performance serious shooters expect.