The MFT Extreme Duty Magazine provides clear visual confirmation of round count and ammunition type with its transparent polymer construction. Designed specifically for AR-10/SR25/M110 pattern rifles and optimized for SAAMI-spec 7.62x51/.308 Winchester ammunition.MFT Extreme Duty 20-Round Magazine.308 Winchester/7.62x51 caliber compatibilityClear polymer construction with textured surface to eliminate shineNext Generation Long Glass Fiber Polymer for enhanced durabilityFour-way Anti-tilt Self-lubricating FollowerRibbed Front and Rear Gripping SurfaceFlared Floor Plate and Oversized Bolt CatchPaint Pen Dot Matrix for markingBuilt to exceed demanding military performance specifications this magazine utilizes advanced material technology and manufacturing processes for superior strength durability and reliability in tactical and sporting applications.