Description
Assemble your own BRN-4 Upper Receiver Assembly
Machined from billet aluminum the new BRN-4 Stripped Upper Receiver mates perfectly with the Brownells BRN-4 barrels, gas system components and bolt carrier group. Assemble a BRN-4 Upper Receiver Group from all new parts, no more relying on surplus, used components. Precision machining of the billet aluminum gives the appearance of a forged part, with finely mapped contours, leaving no unecessary flat surfaces or sharp edges.
Matte black hardcoat anodizing. Anodizing meets or exceeds mil-spec requirements for thickness. Laser engraved T-Marks and BRN-4 logo.
Fits standard AR-15 & M16 Lower Receivers. Accepts standard AR-15 & M16 ejection port covers and forward assists. Does not include Op Rod / Upper Receiver Bushing (sold seperately).
Requires BRN-4 Upper Receiver Bushing (078000700)
Compatible with early style, HK® 416 (A1-A3) barrels and barrel nuts.
PLEASE NOTE: This is a Billet Receiver, machined from a solid block of aluminum. As a result, it will show machine passes on some of the more complex geometry. These are intended to retain the overall exterior dimensions of a forged part. These surfaces are prepped by bead blasting to reduce the profile of any machining prior to anodizing.See all of our AR15s and AR15 parts here.Restricted PartPlease check with your state regulations for ownership of Restricted Parts. May require documentation.WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov
