Complete Uppers

Iconic 10.3" 5.56 NATO URG with RIS II quad rail, the same configuration used by USSOCOM.

LMT's Monolithic Rail Platform upper with quick-change barrel system. Premium mil-spec quality.

Clean machining, consistent gas, and easy parts support. Choose 4150 CMV or stainless barrels and pinned gas blocks when possible.

Premium 11.5" complete upper with CHF barrel, MK16 handguard, and REBCG. CQB optimized.

Premium 16" complete upper with CHF chrome-lined barrel, MK16 M-LOK handguard, and proprietary gas system. Drop-in upper for any mil-spec lower.

BCM 16-inch standard Enhanced Light Weight 5.56 upper with MCMR-15 free-float handguard for a balanced general-purpose AR build.

BCM upper receiver group for builders choosing among standard, BFH, MK2, barrel-length, and rail configurations.

Premium 11.5" 5.56 NATO URG with RIS III M-LOK handguard and cold hammer forged barrel.

Classic 14.5" M4A1 configuration with pinned front sight post and quad rail.

Block 2 RIS II upper without the front sight post. Low-profile pinned gas block under the quad rail for a clean folding-sight build.

The clone-correct heavy-profile Block 2 upper. SOCOM-profile barrel and RIS II rail, shipped stripped so you pin your own SureFire muzzle and add a BCG.

BCM 11.5" BFH (Barrel Forged Hammer) upper with MCMR-10 M-LOK handguard. Cold hammer forged chrome-lined barrel for maximum durability and extended service life.

Short-stroke-piston 5.56 upper that feeds from STANAG magazines or M27 linked belts.

Complete dedicated .22LR blowback upper group for AR-15 lowers, the recommended host for a rimfire forced reset trigger build.

Lightweight 16" 5.56 NATO URG with MFR XS M-LOK handguard and lightweight barrel profile.

Premium 14.5" 5.56 NATO URG with RIS III M-LOK handguard, pinned and welded to 16" OAL.

Premium 12.5" complete upper balancing velocity and compactness. CHF barrel, MK16 handguard, REBCG.

Geissele's Super Duty uppers feature their proven reliability rail, chrome-lined barrels, and impeccable fit/finish. Available in 11.5", 12.5", 14.5", and 16" configurations.

Closest complete commercial USASOC URG-I near-clone upper: 14.5" CHF government-profile barrel, pinned SureFire SF4P, 13.5" MK16 DDC rail, REBCG.

PSA's Premium/CHF lines use FN-made barrels and solid QC for the price. Look for mid-length gas and pinned gas blocks when available.

Third-generation MCX upper in 11.5" 5.56 NATO. Short-stroke piston system drops onto any AR-15 lower with folding capability.

Complete upper receiver chambered in .300 Blackout. Optimized for suppressed use.

Pin-and-weld 14.7" upper for 16" OAL compliance with shorter handling characteristics.

M4E1 complete upper with threaded receiver for easy barrel nut installation. Value-oriented drop-in option.

The fastest path to a mag-fed .308 hog rifle: drop this 16-inch complete upper onto any DPMS-pattern M5 lower and add a BCG.

Complete upper in 6.5 Grendel for extended range. Ideal for hunting and precision.

BCM MK2 14.5-inch standard mid-length upper with MCMR-13 handguard for builders who want BCM's reinforced MK2 receiver format.

BCM Standard 16" M4 SOCOM complete upper with an F-marked fixed front sight base and no handguard, built to take the two-piece Knight's Armament M4 RAS drop-in quad rail. The fixed front sight over a carbine-gas 16" SOCOM-profile barrel is the geometry a Block 1 clone needs.

Complete 16-inch 5.56 side-charging upper with a reciprocating right side charging handle, M4-profile barrel, 15-inch M-LOK rail, and a 1/2x28 flash hider, drops onto any standard AR-15 lower.

Complete 16.1-inch dedicated .22 LR AR upper with an Apogee Match barrel, upgraded bolt group, rimfire ejection port, M-LOK rail, and ambidextrous charging handle.

The clone-correct turnkey MK12 SPR upper: an 18" stainless match barrel with the issued PRI (Mod 0) or KAC (Mod 1) handguard, so it is clone-correct by parts.

The 9-inch barrel variant of the dedicated .22LR blowback Banshee upper, the mid-length host option for a rimfire forced reset build.

Fixed-ejector Radial Delayed Blowback 9mm upper group, CMMG product 99B9A0F, documented for Mk4/mil-spec AR-15, Mk17, and MkGs lower configurations.

16" mid-length 5.56 URG built on the 12.5" RIS III M-LOK rail, with the DD BCG and GRIP-N-RIP charging handle included.

10.3" .300 Blackout URG optimized for suppressed shooting with S2W barrel profile and 1:7 twist.

Standard 16" 5.56 NATO URG with MFR 15" M-LOK handguard and Government barrel profile.

Precision 18" stainless steel URG with MK12 barrel profile and rifle-length gas system.

10.3" 5.56 NATO MK18-style URG with the RIS III M-LOK rail, DD BCG, and GRIP-N-RIP charging handle.

Long-stroke piston upper with an ambidextrous non-reciprocating forward side charging handle, selectable ejection, and a 5-position adjustable gas regulator.

Black 14.5-inch Super Duty MOD1 complete upper with a pinned and welded HUXWRX muzzle device, REBCG, and Airborne Charging Handle.

HK's short-stroke piston MR556 A4 upper with an adjustable gas regulator, complete bolt group, and the tungsten-filled HK buffer. Fits most common mil-spec AR-15 lowers.

Direct impingement upper from LWRC with enhanced features and their signature quality.

Piston-driven complete upper with enhanced reliability and cold-hammer-forged barrel. Premium suppressor host.

Complete tunable ball-bearing-delayed 9mm upper for standard AR-15 or compatible pistol-magazine lowers.

Complete 16-inch 5.56 upper built on a Gibbz Arms G4 billet receiver with a non-reciprocating left-side charging handle and M-LOK rail; the bolt carrier group is a selectable add-on. Drops onto any standard AR-15 lower.

Budget-friendly 10.5" complete upper with nitride barrel and M-LOK handguard. Excellent value for compact builds and entry-level PDW configurations.

PSA's 16" mid-length complete upper on a 4150V nitride barrel, shipping with a full-auto-profile BCG and charging handle. The cheapest vetted way to get a running 5.56 upper.

Complete 8.5-inch .338 ARC upper for a standard AR-15 lower; PSA documents a 6.5 Grendel-family BCG, charging handle, and 10-round .400 Legend magazine in this host configuration.

Premium upper with fully ambidextrous controls and match-grade barrel.

Purpose-built IAR upper with barrel heat sinks, Superlative Arms short-stroke piston, and Shaw 14.5" Block 4 barrel. Designed for the auto-rifleman role.

Rifle-length EPC-9 complete upper assembly for 16-inch 9mm PCC builds with M-LOK accessory support.

Compact EPC-9 complete upper assembly with 8.3-inch 9mm barrel and M-LOK handguard for direct-blowback AR9 builds.

Radial Delayed Blowback 9mm upper setup for CMMG Mk9 Colt SMG-style magazine lowers using CMMG's shared 9mm RDB upper path.

Colt's M4A1-TDP upper with a Centurion Arms 13" M-LOK free-float rail. Drop-on for any mil-spec lower.

Compact 11.5" 5.56 NATO URG with MFR M-LOK handguard and carbine gas system.

PSA AR-V kit that includes the slick-side upper, stripped lower, 9mm BCG, and AK-V U9 magazine for Scorpion-magazine AR9 builds.