The stylization of the YHM-110-BILLET was directly related to the stylization of the Billet lower which YHM finished first. It is crafted from 7075-T6 aluminum and has a hardcoat anodized matte black finish. It features M4-style feed ramps and the inside is coated with dry film lube. It accepts standard upper receiver parts and mil-spec lower receivers. *Note- Requires a dust cover, forward assist, charging handle, barrel, handguard, gas block, muzzle device, gas tube and BCG (Bolt Carrier Group) to complete.