ProMag RM40SL AR-15 5.56mm 40-Round Polymer Magazine

In the realm of firearms, reliability is not merely a feature; it is a necessity. ProMag understands this with their 40-round magazine for AR-15 rifles chambered in 5.56mm—a testament to American craftsmanship and durability. Carefully engineered, each component of this magazine serves a crucial role in ensuring flawless performance.

The body of the magazine is constructed from a proprietary DuPont Zytel-based polymer, offering an impressive balance between lightweight design and robust strength. This advanced material resists impact and wear, providing longevity under rigorous conditions.

At its core lies precision—evident in the heat-treated chrome silicon wire used for the spring. This meticulous treatment ensures consistent pressure over thousands of cycles, essential for reliable feeding every time you pull the trigger.

ProMag's dedication extends further into its patented anti-tilt Roller follower system, which prevents misfeeds by maintaining proper alignment within the magazine well. Over-molded stamped steel feed lips and catch contribute additional layers of security against deformation or failure during operation.

Every stage in crafting these magazines undergoes thorough inspection—not once but twice—to uphold unwavering quality standards that shooters can trust without hesitation.

Proudly made on American soil, ProMag backs their products with a lifetime guarantee against manufacturer defects—a promise as steadfast as your commitment to excellence.