MI FORGED UPPER RECEIVER: Forged from 7075 T6 aluminum Precisely machined to M16/M4 specs M4 feed ramps Hard-coat anodized mil 8625 type 3 class 2 finish .250 take down pins MI M16 bolt carrier group MI-CRM12” Combat series handguard, M-LOK compatible Laser engraved T-marks Lightweight Melonite barrel, 16 inch, 1/8 twist, .223 Wylde chamber Mid-Length gas system, .625 diameter barrel A2 flash hider MI FORGED LOWER RECEIVER: Machined from 7075 T6 forged aluminum Matte black hard-coat anodized mil 8625 type 3 class 2 finish Receiver marked ”CAL-MULTI” Works with standard AR15 components and magazines Receiver rear takedown pin detent hole threaded for a 4-40 set screw Mil Spec diameter buffer tube Magpul CTR buttstock Magpul MOE grip Heavy Duty Quick Detach End Plate MI-HDEP