Plinker Plus Flat Top AR-15 Specifications Receiver Material 7075 T6 Aluminum Forged Receivers Machined By Olympic Arms Receiver Finish Black Matte Anodized Receivers, Parkerized Steel Parts Action Gas Operated Semi-automatic Action Upper Type Flat top w/ picatinny rails Front Sight Gas block w/ picatinny rails Handguard Fiberite M4 carbine Barrel 16", button rifled, 4140 chromemoly steel Chambering 5.56 NATO Bore Long-life non-chromed bore Twist Rate 1x9 Muzzle A2 flash suppressor Stock M4 fiberite, 6-point collapsible Length 35.75" Weight 7.37 lbs $713.70 MSRP