The Upper Standard Receiver is precision machined with an ultra-smooth proprietary bore. At a roughness average of 16 µin, bolt carrier friction is significantly less than a typical upper receiver creating a silkier action. Barrel nut threads, bore, and barrel extension surfaces are all machined in one operation for a perfectly concentric, perpendicular fit to the barrel assembly.
- Forged 7075-T6 aluminum receiver
- MIL-SPEC Type III Class 2 hardcoat anodized finish
- Ultra-smooth burnished bore
- M4 feedramps
- Weight 7.0 oz
- Made in the U.S.A.
LANTAC USA manufactures the highest quality accessories for AR-15/M16 pattern rifles. Precision made in the U.S.A., rifles, muzzle brakes and more.