The Jacob Grey Ultralight Rifle was designed with the next generation AR-15 in mind. This AR-15 rifle is built around the 7075-T6 billet lower receiver specifically machined and cut in areas where excess material was unnecessary and areas that see excess use and wear reinforced and strengthened to give a sleek refined look without losing the classic lines of the AR-15 platform. The same consideration was given to the matching billet upper receiver. It comes standard with the JG designed 15 free float 7-sided M-LOK hand-guard that is also lightweight and leaves plenty of room for customization or the addition of numerous accessories available for the AR-15 rifle. The 16 barrel is chambered in 5.56 NATO with a 1:7 twist rate. The barrel is machined from 4150 chrome moly steel and black Nitride finished for corrosion resistance and accuracy. Each barrel is individually head-spaced to the Carpenter 158 bolt. Combined with the 8620 steel carrier and black Nitride finish this rifle is extremely reliable and smooth shooting. - Features: - Lower receiver: - Billet 7075-T6 aerospace aluminum - Laser engraved logo - MIL-A-8625F Type III Class 2 hardcoat anodized finish - Compatible with MIL-SPEC lower receiver parts - Dimensional accuracy inspected - All sharp edges de-burred by hand. - Multi caliber marking for build versatility - Flared and beveled magwell - Set screw installation for bolt catch - Integrated winter trigger guard - Weight: 7.9oz - Upper receiver: - Compatible with most standard mil-spec handrails with indexing tabs also. - Billet 7075-T6 aerospace aluminum - Jacob Grey lightweight design - M4 feed ramps - Machined T-marks - Laser engraved logo - MIL-A-8625F Type III Class 2 hardcoat anodized flat black finish - Compatible with Jacob Grey Billet dust covers and MIL-SPEC AR upper receiver parts - Weight: 7.7oz