| Product | Description |
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 $529.99 | Adams Arms Ar-15/M16 5.56 16"" Basic Piston Upper ReceiversComplete Base upper receiver assembly comes ready to install on mil-spec lower receiver to produce a reliable, positive-cycling gas piston gun. Adams Arms' proven piston system doesn't vent hot gases and burned powder into the bolt carrier and receiver, so the gun runs cooler, with less fouling and wear on the action, and easier maintenance. Short-stroke piston shaft eliminates concussive gas expansion in the upper receiver for less violent cycling, smoother feeding, and reduced felt recoil. The receiver is forged from 6061 T6 aluminum and features M4 feed ramp cuts and a 13-slot Picatinny-cut flattop rail. The adjustable gas block allows three levels of gas release: norm Mfg: Adams Arms SPECS: Receiver 6061 T6 aluminum, hardcoat anodized, black. Barrel Chrome-moly steel, Melonite coated, matte black. Gas Block, Piston Tube, Bolt Carrier Steel, black oxide finish. Piston Stainless steel. Carbine 16"" (40.6cm) barrel, ParAdams Arms Ar-15/M16 5.56 16"" Basic Piston Upper Receivers |
 $239.99 | Radical Firearms Ar-15 Upper Receiver Assembly 5.56 M4 16"" CarbineThe Radical Firearms M4 16"" Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Forged Upper Receiver, Forward Assist, Ejection Port Door and Barrel Nut. These uppers also come installed with Radical Firearm's FGS Free Float handguard, which features QD points at various points along its round exterior. Barrel is machined from 4150V chrome moly steel, melonited, has a 1-7 twist & is chambered in 5.56x45mm NATO. Upper & barrel feature M4 feed ramps. A2 flash hid Mfg: Radical FirearmsRadical Firearms Ar-15 Upper Receiver Assembly 5.56 M4 16"" Carbine |
 $239.99 | Radical Firearms Ar-15 Upper Receiver Assembly 5.56 Socom 16"" MidlengthThe Radical Firearms SOCOM Upper Receiver is a flat top, law-enforcement grade, drop in receiver, ready to be mounted to any Mil-Spec AR-15 lower receiver! This fully mil-spec compliant receiver provides a high-quality upper for any level budget or shooter. Comes complete and assembled with Forged Upper Receiver, Forward Assist, Ejection Port Door and Barrel Nut. These uppers also come installed with Radical Firearm's FGS Free Float handguard, which features QD points at various points along its round exterior. Barrel is machined from 4150V chrome moly steel, melonited, has a 1-7 twist & is chambered in 5.56x45mm NATO. Barrel has a SOCOM Government profile.Mfg: Radical FirearmsRadical Firearms Ar-15 Upper Receiver Assembly 5.56 Socom 16"" Midlength |
 $284.99 | Brownells Ar-15 Assembled Upper Receiver Keymod 300 BlackoutThis Brownells' exclusive AR-15 Upper Receiver is Made in the USA. Chambered in 300 Blackout and featuring a 16"" barrel with a 1:8 twist. The standard A3 13-slot aluminum flat top receiver comes with a 10"" handguard utilizing the KeyMod rail system. A low profile gas block, forward assist, ejection port cover and phosphate finish help to complete this package. Left out of this upper are the bolt carrier group as well as the charging handle so you can customize the upper any way you want! The A3 upper receiver will attach to almost any standard AR-15 lower receiver. Mfg: BrownellsBrownells Ar-15 Assembled Upper Receiver Keymod 300 Blackout |
 $369.99 | Brownells Ar-15 Complete Upper Receiver Black Keymod 5.56This Brownells' exclusive Complete AR Upper Receiver is Made in the USA. Chambered in 5.56x45mm NATO and featuring a 16"" barrel with a 1:8 twist. The standard A3 13-slot aluminum flat top receiver comes with a 10"" handguard utilizing the KeyMod rail system. A low profile gas block, bolt carrier group, charging handle, forward assist, ejection port cover and phosphate finish help to complete this outstanding package. This complete A3 upper receiver will attach to almost any standard AR-15 lower receiver. The BCG is the M16-style BCG. It will not work with older Colt lowers that have the sear block. Mfg: BrownellsBrownells Ar-15 Complete Upper Receiver Black Keymod 5.56 |
 $431.49 | Brownells Ar-15 Complete Upper Keymod 5.56 W/ 5-Pk 30-Rd PmagThis Brownells' exclusive Complete AR Upper Receiver is Made in the USA. Chambered in 5.56x45mm NATO and featuring a 16"" barrel with a 1:8 twist. The standard A3 13-slot aluminum flat top receiver comes with a 10"" handguard utilizing the KeyMod rail system. A low profile gas block, bolt carrier group, charging handle, forward assist, ejection port cover and phosphate finish help to complete this outstanding package. This complete A3 upper receiver will attach to almost any standard AR-15 lower receiver. The receiver is being paired with 5 Magpul PMAGs for even better savings! Exceptionally rugged, combat- and competition-ready magazine Mfg: BrownellsBrownells Ar-15 Complete Upper Keymod 5.56 W/ 5-Pk 30-Rd Pmag |
 $284.99 | Brownells Ar-15 Assembled Upper Receiver Keymod 5.56 NatoThis Brownells' exclusive AR-15 Upper Receiver is Made in the USA. Chambered in 5.56 NATO and featuring a 16"" barrel with a 1:8 twist. The standard A3 13-slot aluminum flat top receiver comes with a 10"" handguard utilizing the KeyMod rail system. A low profile gas block, forward assist, ejection port cover and phosphate finish help to complete this package. Left out of this upper are the bolt carrier group as well as the charging handle so you can customize the upper any way you want! The A3 upper receiver will attach to almost any standard AR-15 lower receiver. Mfg: BrownellsBrownells Ar-15 Assembled Upper Receiver Keymod 5.56 Nato |
 $869.99 | Yankee Hill Machine Co., Inc. Ar-15 5.56 16"" Black Diamond Specter Upper ReceiverFlattop upper comes with high-end custom features and accessories already installed, ready to snap on the mil-spec lower receiver of your choice. Comes fully assembled with bolt/carrier, charging handle, tactical handguard, gas block, and barrel.Features a free-floated Diamond handguard with uniquely-patterned holes machined between the rails to reduce weight and enhance barrel cooling. Four full-length MIL-STD 1913 Picatinny rails have individually marked slots for quick reference. The handguard bridges the gap to the front of the receiver to form one continuous, uninterrupted top rail; extends over the low-profile gas block for a smooth, streamlined appearance. Specter Upper features Sp Mfg: Yankee Hill Machine Co., Inc. SPECS: Receiver 7075 T6 aluminum alloy, mil-spec Type III hardcoat anodized finish, matte black. Barrel Chrome-moly vanadium steel alloy, heat treated to Rc 25-32, matte black finish. Chrome-lined. 16"" (40.6cm) long. 1-9"" twist, chambered for 5.56mm NATO. HandguardYankee Hill Machine Co., Inc. Ar-15 5.56 16"" Black Diamond Specter Upper Receiver |
