Mission First Tactical Extreme Duty AR-10 .308 Winchester/7.62x51mm NATO 10 Round Rifle Magazine Translucent Clear 10. Streamlined and user-friendly the updated design allows shooters more time to send rounds down range and less time making field adjustments or modifications. In addition the upgraded upper receiver attachment system increases shooter stability and minimizes the inner diameter providing a more streamlined appearance. Updated modern wall thickness addresses the flimsiness of other rail systems by providing the strength needed to attach a variety of M-LOK accessories. Specifications for Mission First Tactical Extreme Duty AR-10 .308 Winchester/7.62x51mm NATO 10 Round Rifle Magazine: Manufacturer: Mission First Tactical Magazine Capacity: 10 Round Caliber: 7.62x51mm NATO .308 Winchester Gun Model: AR-10 Additional Features: Magazine Number of Rounds: 10 Features of Mission First Tactical Extreme Duty: 7 sides of M-LOK Package Contents: Mission First Tactical Extreme Duty What firearm models does the manufacturer say Mission First Tactical Extreme Duty AR-10 .308 Winchester/7.62x51mm NATO 10 Round Rifle Magazine is compatible with? The manufacturer suggests that Mission First Tactical Extreme Duty AR-10 .308 Winchester/7.62x51mm NATO 10 Round Rifle Magazine is compatible with AR-10Mission First Tactical 10EXD762X51-T-C: Extreme Duty AR-10 .308 Winchester/7.62x51mm NATO 10 Round Rifle Magazine Translucent Clear 10