.223 WYLDE CHAMBERED - 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-CRM14 Combat series handguard M-LOK(TM) 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(R) CTR(R) buttstock - Magpul(R) MOE(R) grip - Heavy Duty Quick Detach End Plate MI-HDEP - Weight 5lb 14.9oz.