Assembled AR-15 upper receivers — 5.56, 9mm, .300 BLK
Complete AR-15 upper receivers from Aero Precision, Ballistic Advantage, Luth-AR, Black Rain Ordnance, and our XTS in-house line. Each upper in this category ships barreled with a handguard installed and drops onto any mil-spec AR-15 lower.
Caliber and platform coverage:
- 5.56 NATO / .223 Wylde — 16" and 16.5" carbine and mid-length gas systems; the common rifle build.
- 9mm AR-9 (EPC-9 pattern) — Aero Precision blowback uppers for pistol-caliber carbine builds running Glock-pattern magazines through an EPC lower.
- .300 AAC Blackout — short-stroke uppers tuned for subsonic and supersonic loads.
With or without BCG: some uppers ship complete with bolt carrier group and charging handle, others arrive as the upper, barrel, gas system, and handguard only. Each listing notes which configuration you are buying — if a BCG and charging handle are not included, you will need to source them separately.
Pair with a buffer tube and kit, a charging handle, or a handguard for a different look. For barrel-only or upper-parts swaps, see AR barrels and parts.
Free shipping on every order.
