The M4E1 Threaded Upper Receiver features an angular machined design that helps it stand apart from standard mil-spec upper receivers. It is threaded to accept a standard AR-15 barrel nut and forged from 7075-T6 aluminum and precision machined to work with all mil-spec AR-15 parts. The M4E1 features a picatinny profile, M4 feed-ramps, and .250 take-down pin holes. This model has a black hardcoat anodized finish. NOTE: This model does not include port door or forward assist.
|Series||Stripped Upper Receiver|
|Sights||None, Optic Ready|
|Caliber||223 rem556 nato|
|Receiver Description||7075-T6 Aluminum|
Determined at checkout.