Magpul AR-15 Magazine Features The Magpul PMAG GEN M3 Window is a 30-round magazine built for AR-15/M4 compatible platforms chambered in 5.56 / .223 Rem featuring transparent windows on both sides of the magazine body. This MagLevel system pairs a high visibility indicator coil on the spring with numerical markers giving shooters a fast approximate round count without needing to remove the magazine to check. Constructed from crush and impact resistant polymer the GEN M3 Window incorporates the same material technology as the standard GEN M3 line for enhanced strength and reliability. A long-life stainless steel spring and four-way anti-tilt follower work together to provide consistent reliable feeding. A redesigned bolt catch notch in the rear of the magazine provides increased bolt catch clearance for more positive lock back on an empty magazine. An over-travel stop on the spine helps prevent over-insertion on compatible rifle platforms protecting the magazine well from damage. Low profile ribs and aggressive texture on the front and rear of the body give shooters a secure grip when loading or removing the magazine under stress. Finished in Coyote Brown the Magpul PMAG GEN M3 Window is available for sale at GrabAGun for shooters who want quick visual confirmation of their remaining ammunition. Magpul AR-15 Magazine Specifications Manufacturer: Magpul Model: PMAG GEN M3 Window Caliber: 5.56 / .223 Rem Capacity: 30 Rounds Color: Coyote Brown Material: Polymer Overall Length: 7.5 Weight: 5 oz Feature: Dual-Side Transparent Windows MagLevel System Available At: GrabAGun