Compatible with the Gen 3 Magpul® PMAG®, the Magpul® Factory Minus-10 Round Limiter for PMAG AR-10 GEN M3 7.62×51, 3-Pack installs in 10, 20, or 25 round 7.62×51 LR/SR GEN M3 PMAG bodies, reducing the magazine capacity by 10 rounds. This limiter features an impact-resistant polymer body, designed to convert any 7.62×51 Gen 3 PMAG into a 10-round magazine for hunting, competition shooting, and more. Better yet, this round limiter offers quick, convenient, tool-free installation for field-ready performance.