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Shop CMMG's complete AR-15 and AR-10 upper receivers. Includes bolt carrier group (BCG) and charging handle. Easy installation for custom rifle builds. Buy now!
The NBS 20″ 5.56 Rifle M-LOK Upper Assembly, is a great all around upper, especially for hunting or long-range target practice. With higher velocity and a longer sight radius with this 20″ barrel, we wanted to make sure that any shooter could take this out and shoot long distances, reliably.
Check out our AR-15 20 inch uppers, designed for precision and long-range shooting. Find the perfect 20 inch AR15 complete upper for your build.
The forged upper receiver itself is the classic M16A2 style, with the robust and incredibly adjustable A2 rear sight assembly. The elevation drum can be adjusted from 300 to 800 meters (zero at 25m for 300m).
BCM® Standard 20" Complete Upper Receiver Group w/ MCMR-15 Handguard. MSRP: $970.35.
Build a super accurate Ar-15 with this premium 20″ 416r Stainless Fluted upper. Features: 20″ 416r Stainless Fluted Barrel. 223 Wylde chamber (shoots 556 / 223), Wylde for improved accuracy. Other fluting options available in menu.
This upper assembly features a standard Mil-Spec upper receiver, which has a Type III Class 2 hardcoat anodized finish. It has a port door to prevent dust and debris from entering the chamber and also features a forward assist.
