The Guntec USA AR-15 5.56 Slabside stripped billet upper receiver in black anodized (brand part no. GTUPPERSLBLACK) is a flat-top upper machined from 6061-T6 billet aluminum for builders putting together their own AR-15. The slim slabside profile carries a 1913 Picatinny top rail, a slim brass deflector and a hardcoat black anodized finish. It skips the forward assist, which trims weight to about 7 ounces, and the M4 feed ramps match standard carbine barrels. It is sold stripped, so you supply the barrel, bolt carrier group, charging handle and handguard. Guntec has made AR-15, AR-308 and AR 9mm accessories since 1989, and Guntec USA offers this upper in a range of colors.

Key Specifications

• The upper is built for the 5.56 AR-15 platform, so it accepts standard AR-15 barrels and parts.
• It is machined from 6061-T6 billet aluminum, which makes for a strong and light receiver.
• The finish is hardcoat black anodizing, a durable coating for a build rifle.
• The top is a flat-top 1913 Picatinny rail, so optics and sights mount directly.
• A slim profile brass deflector keeps the upper streamlined.
• There is no forward assist, which saves weight and keeps the slabside look clean.
• The receiver has M4 feed ramps, matching standard carbine barrels and bolt carrier groups.
• The receiver is stripped, so it is ready for your choice of barrel and parts.

Frequently Asked Questions

Is this upper complete? No. It is a stripped upper receiver, so you add the barrel, bolt carrier group, charging handle and handguard.

What dust covers fit? The upper accepts Mil-spec or Gen 3 dust covers.

Does it have a forward assist? No. The slabside upper has no forward assist.

Buy the Guntec USA AR-15 5.56 Slabside Stripped Billet Upper Receiver, Black

A billet slabside upper gives a custom AR-15 build a clean look and a rail that is ready for optics. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more AR-15 uppers while you are here.