the PMAG 30 GEN M3 Window is a polymer magazine for AR15/M4 compatible weapons that features transparent windows to allow rapid visual identification of approximate number of rounds remaining. In addition, a redesigned bolt catch notch in the rear of the magazine provides increased bolt catch clearance, while an over-travel stop on the spine helps ensure the magazine will not over-insert on compatible weapons. Low profile ribs and new aggressive front and rear texture gives positive control of the GEN M3 in all environments, and a paint pen dot matrix has been added to the bottom panel of the body to allow easy marking by the end user for identification. The new, easy to disassemble flared floorplate aids extraction and handling of the magazine while providing improved drop protection, but is slightly slimmer than before for better compatibility with tight double and triple magazine pouches. Note: This item is also compatible with HK 416/MR556A1/M27 IAR, British SA-80, FN SCARN MK 16/16S, and others. Specifications for Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 30 Round Rifle Magazine w/Capacity Window: Manufacturer: Magpul Industries Fabric/Material: Polymer Magazine Capacity: 30 Round Cartridge: 5.56x45mm NATO, .223 Remington Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Pack Features of Magpul Industries PMAG 30 Gen M3 Window AR-15/M4 5.56x45 NATO/.223 Remington, 30 Round Rifle Magazine 30-round reliability and no stoppages Anti-glare translucent MagLevel windows on both sides of the body along with a painted indicator on the spring allows for easy determination of rounds remaining from 1 to 30 Next-generation impact and crush-resistant polymer construction Modified dimensions allow for wider compatibility with non Colt-spec 'STANAG 4179' platforms The anti-tilt, self-lubricating follower ensures a smooth feed and magazine reliability Constant-curve internal geometry, over-travel insertion stop on the spine, and a long-life stainless steel spring ensure smooth feeding Paint pen dot matrix panels on the bottom of the body to allow for identification marking Its ribbed gripping surface and aggressive front and rear texture provide positive magazine handling Improved slimmer floorplate aids magazine handling and disassembly and is slim enough for use with many double and triple pouches Package Contents: Magpul Industries PMAG GEN M3 AR-15/M16/M4 .223 Rem/5.56x45mm NATO 30 Round Rifle Magazine w/Capacity Window