Upper Assemblies
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Out Of StockOn Sale
Daniel Defense, Complete Upper Receiver, MK18 URG, 556NATO, 10.3" Hammer Forged Barrel, 1:7 Twist, Flat Top Receiver, Flat Dark Earth Finish
Daniel Defense
Now: $1,199.98Was: $1,412.00Use what THEY use. The Daniel Defense MK18 Upper Receiver Group features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel. The MK18 Rail Interface System (RIS II) features the Bolt-Up System has been...Now: $1,199.98Was: $1,412.00 -
On Sale
Caracal CAR814 A2 Patrol 16" Complete Upper 5.56x45mm
CARACAL
Now: $699.98Was: $855.00KEY FEATURES Built to exceed NATO test protocols including; Bore Obstruction and “Over the Beach” Testing. Caracal® Forged 7075 Hard Coat Anodized upper and lower receiver set Caracal® 12″ Handguard with key lock anti cant,...Now: $699.98Was: $855.00 -
Out Of Stock
KZ Barrel Spline Socket STEEL Rod AR15/M4 5.56mm Steel Upper Receivers
Kley-Zion
$69.98A great tool that securely holds an upper receiver assembly for maintenance and assembly work. The removal and installation of barrels, flash hiders, gas blocks and hand guards is made much easier and simpler. Designed to be gripped in a bench vise so...$69.98 -
On Sale
Caracal CAR814 A2 Patrol 11.5" Complete Upper 5.56x45mm
CARACAL
Now: $669.98Was: $855.00KEY FEATURES Built to exceed NATO test protocols including; Bore Obstruction and “Over the Beach” Testing. Caracal® Forged 7075 Hard Coat Anodized upper and lower receiver set Caracal® 9.1″ Handguard with key lock anti cant,...Now: $669.98Was: $855.00 -
On Sale
Noveske CHAINSAW 7.94 Diplomat Complete Upper .300 Blackout
Noveske
Now: $999.98Was: $1,125.00Noveske CHAINSAW 7.94 Diplomat Complete Upper .300 Blackout Barrel• 7.94” 300BLK 416R Stainless with 1:7 twist• Individual serialized barrel for QC purposes• Hand polished 300 Blackout Chamber• Pistol length gas tube...Now: $999.98Was: $1,125.00 -
Out Of Stock
KAC SR15 CQB 11.5" Complete Upper Receiver
Knights Armament
$1,989.98Knights Armament Company, SR-15, CQB Mod2, Complete Upper Receiver, 556NATO, 11.5" Hammer Forged Barrel, Black Finish, MLOK The SR-15 E3 Mod 2 series' 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4...$1,989.98 -
Out Of StockOn Sale
Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver w/o Muzzle Device
Primary Weapons
Now: $999.98Was: $1,349.98Specifications for Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver: Manufacturer: Primary Weapons Systems Cartridge: .223 Wylde Barrel Length: 14.5 in Finish: Matte Color: Black Condition: New Package...Now: $999.98Was: $1,349.98 -
Daniel Defense M4A1 Upper Receiver 5.56mm 14.5"/16" Overall Barrel
Daniel Defense
$1,499.00Daniel Defense’s M4A1 AR15 Style Upper Receiver Group was inspiered by the USSOCOM SOPMOD Block II, and comes packed with Daniel Defense exclusive features. The upper receiver is MIL-SPEC with indexing marks and M4 feed ramps, and is...$1,499.00 -
Heckler & Koch MR556 A4 16.5" Complete Upper Receiver Kit
Heckler & Koch
$2,299.00MR556 A4 16.5" UPPER RECEIVER KIT SKU#51000384 Complete MR556 A4 Upper Receiver/Barrel Assembly— HK 16.5 inch cold-hammer forged barrel, upper receiver with forward assist, extended convertible charging handle, HK Free Floating Rail System...$2,299.00 -
Out Of Stock
Maxim Defense Industries PDX Complete Upper
Maxim Defense
$1,165.00The NEW Maxim Defense PDX(TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. With the PDX(TM) U.R.G, you dominate close quarter encounters and achieve maximum energy on target...$1,165.00 -
On Sale
Now: $999.98Was: $1,350.00 -
H&K MR556 A4 11.5" Complete Upper Receiver Kit
Heckler & Koch
$2,299.00This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK’s piston and pusher rod system. This system utilizes a piston and a pusher rod in place of the gas tube normally found in...$2,299.00
The Upper Assemblies category includes a wide range of complete upper receiver assemblies for AR-15 style rifles. These assemblies come with everything you need to upgrade or customize your firearm, including barrels, handguards, and receivers. Brands like Colt, KAC, Daniel Defense, and Primary Weapons Systems offer high-quality options with various barrel lengths and finishes to suit your needs. Whether you're looking for a compact CQB setup or a versatile all-purpose upper receiver, you'll find top-notch options in this category to help you enhance the performance and appearance of your rifle.