Magpul Industries PMAG GEN M3 AR-15 Rifle Magazine .300 Blackout 20 Round Black 10 Pack. 300 Blackout (300 BLK). Similar in every way to PMAG 30 AR 300 B the PMAG 20 is more compact for increased maneuverability and creates a more concealable package for use in small format firearms. The PMAG 20 AR 300 B's distinct ribbed design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues. Specifications for Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine: Manufacturer: Magpul Industries Color: Black Fabric/Material: Polymer Magazine Capacity: 20 Round Caliber: .300 AAC Blackout Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Pack Condition: New Features of Magpul Industries PMAG 20 Gen M3 .300 AAC Blackout 20 Round Rifle Magazine Dedicated reliable magazine for rifles chambered in 300 BLK that supports the differing geometries found in that caliber 20-round body is more compact for increased maneuverability creating a more concealable package for use in small format firearms Distinct rib design and texture provide visual and tactile differentiation from other PMAGs to mitigate dangerous cross-loading issues Next-generation impact and crush-resistant polymer aggressive front and rear texture easily removable slim floor plate and a paint pen dot matrix Package Contents: Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine What firearm models does the manufacturer say Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine is compatible with? The manufacturer suggests that Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine is compatible with AR-15