Rifle Upper Receivers US Specifications
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 Aero Precision M4e1 Assembled Upper Receiver 10.5" 5.56mm Carbine Length M4e1 Assembled Gen2 Upper 10.5 Car Length 9 Handguard US Specifications
USD 374.99
(Indicative price - actual current price possibly lower)
Technical data & information: Aero precision's m4e1 5.56mm 10.5" carbine upper receiver comes fully assembled, lacking only a bolt/carrier group and charging handle, the two most popular components for customization. At its heart is aero's forged m4e1 receiver that combines the look of a custom billet receiver with "mil-spec" parts compatibility (including bcg and charging handle) and a proprietary attachment system for the included handguard. Aero has fitted the m4e1 5.56mm 10.5" carbine upper receiver with a barrel of high-grade 4150 chrome-moly-vanadium carbon steel chambered for 5.56mm nato ammunition, so it will safely handle civilian .223 remington ammo too. The versatile 10 mfg: aero precision. US specification & reliable quality rifle upper receivers by Aero Precision. Part Nr: APAR640221M2.
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Brownells Ar 15 Assembled Upper Receiver Keymod 5.56 Nato Ar 15 Assembled Upper Receiver W/O Ch Or Bcg 5.56 Nato US Specifications
USD 289.99
(Indicative price - actual current price possibly lower)
Technical data & information: This 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: brownells. US specification & reliable quality rifle upper receivers by Brownells. Part Nr: BRO556MS16KM10S.
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Rock River Arms Ar 15 9mm Upper Receiver Assembly A2 9mm Upper Receiver US Specifications
USD 584.99
(Indicative price - actual current price possibly lower)
Technical data & information: Sub-caliber upper assemblies allow fast and simple conversion of ars chambered in .223 to 9mm luger. True, dedicated, complete upper receivers are assembled from military specification components; includes a wilson, 1-10 twist barrel, bolt and carrier, charging handle, shell deflector, heat-shield lined handguards, sling swivel, and a1-style flash hider. Additional items not included but required for conversion to 9mm are a 9mm magazine (739-000-014); magazine adapter, action spring, and recoil buffer (080-000-442). A2 configuration has a2 adjustable sights regulated for 9mm. Mfg: rock river arms specs: barrel, 4140 steel, blue, matte finish, 16" (40.6cm) long, .725" (18cm) o.D. Receiver, aluminum, anodized finish, matte black. Designed to fit lower receiver with .25" (6.3mm) diameter takedown pins. US specification & reliable quality rifle upper receivers by Rock River. Part Nr: 9MM0550B.
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Smith & Wesson M&P15 Whisper Upper Receiver Assembly 300 Blackout Black M&P15 Whisper 16" Upper Receiver Assy 300 Blackout Black US Specifications
USD 824.99
(Indicative price - actual current price possibly lower)
Technical data & information: Consider smith & wesson's m&p15 .300 whisper complete upper receiver assembly if you'd like to turn an old ar-15 into a compact, versatile .30 caliber modern sporting rifle capable of dropping deer-sized game. Or build a complete rifle from the ground up using the lower receiver, buffer tube, and stock of your choice. The smith & wesson m&p15 .300 whisper complete upper receiver comes fully assembled and fitted with popular features. Feed ramps in the a4-pattern flattop receiver and the gas system are optimized to run efficiently with a wide range of factory loaded subsonic and supersonic ammo, including .300 aac blackout loads. Other features include: mfg: smith & wesson. US specification & reliable quality rifle upper receivers by Smith & Wesson. Part Nr: 812012.
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Rock River Arms A4 9mm Upper Receiver US Specifications
USD 662.99
(Indicative price - actual current price possibly lower)
Technical data & information: Sub-caliber upper assemblies allow fast and simple conversion of ars chambered in .223 to 9mm luger. True, dedicated, complete upper receivers are assembled from military specification components; includes a wilson, 1-10 twist barrel, bolt and carrier, charging handle, shell deflector, heat-shield lined handguards, sling swivel, and a1-style flash hider. Additional items not included but required for conversion to 9mm are a 9mm magazine (739-000-014); magazine adapter, action spring, and recoil buffer (080-000-442). A4 unit has flattop receiver that accepts most aftermarket accessories designed to fit a picatinny rail. Mfg: rock river arms specs: barrel, 4140 steel, blue, matte finish, 16" (40.6cm) long, .725" (18cm) o.D. Receiver, aluminum, anodized finish, matte black. Designed to fit lower receiver with .25" (6.3mm) diameter takedown pins. US specification & reliable quality rifle upper receivers by Rock River. Part Nr: 9MM0350B.
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Aero Precision Ar 15/M16 Assembled Upper Receiver US Specifications
USD 62.99
(Indicative price - actual current price possibly lower)
Technical data & information: The ar-15 assembled upper receiver comes with the port door and forward assist already installed. Forged from 7075-t6 aluminum, this assembled upper is precision machined to mil- spec m16/m4 specifications and features m4 feedramps. Black model features laser engraved t marks. Cerakote fde model does not have t marks. Features: m4 feedramps .250 takedown pin holes includes port door and forward assist mfg: aero precision specs: weighs: 8.35oz, 7075-t6 forged aluminum. US specification & reliable quality rifle upper receivers by Aero Precision. Part Nr: APAR501603AC.
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Brownells Ar 15 Complete Upper M Lok 5.56 W/ 5 Pk 30 Rd Pmag US Specifications
USD 374.99
(Indicative price - actual current price possibly lower)
Technical data & information: This 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 m-lok 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 f mfg: brownells. US specification & reliable quality rifle upper receivers by Brownells. Part Nr: 100-023-286.
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High Standard Ar 15/M16 Complete 300aac Upper Assembly US Specifications
USD 439.99
(Indicative price - actual current price possibly lower)
Technical data & information: Build or convert a rifle to run the 300 blackout round with this complete upper assembly from high standard. The a3 flat top upper is coupled with a 16", parkerized barrel that has a 1-8 twist and is made from 4140 steel.Upper assembly also includes bolt carrier group, charging handle, low profile gas block, and car handguard. Mfg: high standard specs: 16", parkerized, 4140steel, 1-8 twist barrel, low profile gas block, bolt carrier group, charging handle. US specification & reliable quality rifle upper receivers by High Standard. Part Nr: ARUH300BO.
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Aero Precision Ar 15/M16 Assembled Upper Receiver Fde Cerakote US Specifications
USD 84.99
(Indicative price - actual current price possibly lower)
Technical data & information: The ar-15 assembled upper receiver comes with the port door and forward assist already installed. Forged from 7075-t6 aluminum, this assembled upper is precision machined to mil- spec m16/m4 specifications and features m4 feedramps. Black model features laser engraved t marks. Cerakote fde model does not have t marks. Features: m4 feedramps .250 takedown pin holes includes port door and forward assist mfg: aero precision specs: weighs: 8.35oz, 7075-t6 forged aluminum. US specification & reliable quality rifle upper receivers by Aero Precision. Part Nr: APAR501801A.
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Seekins Precision Ar 15 Sp223 Upper Receiver Upper W/Forward Assist & Ejection Port Cover US Specifications
USD 227.05
(Indicative price - actual current price possibly lower)
Technical data & information: Uniquely-sculpted receiver is machined from a solid billet with extra metal in critical areas for added strength. Receiver comes with ejection port cover and forward assist installed, and is compatible with any standard pattern ar lower receiver. Machined with m4 feed cuts for reliable feeding and hardcoat anodized for superior wear resistance. Mfg: seekins precision specs: 7075-t6 aluminum, hardcoat anodized, matte black finish. Forward assist and ejection port cover included. US specification & reliable quality rifle upper receivers by Seekins. Part Nr: 10900009.
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Brownells Ar 15 Complete Upper Receiver Black Keymod 300 Blk US Specifications
USD 425.99
(Indicative price - actual current price possibly lower)
Technical data & information: This brownells' exclusive complete ar 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, 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. Mfg: brownells. US specification & reliable quality rifle upper receivers by Brownells. Part Nr: BRO300MS16KM10.
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Vltor Weapon Systems Ar 15/M16 Modular Upper Receiver Mur Upper Receiver US Specifications
USD 199.99
(Indicative price - actual current price possibly lower)
Technical data & information: The mur is a flattop upper receiver with thicker walls than a standard upper to provide a more rigid platform for greater stability, better accuracy, longer service life, and improved reliability. Precision machined from a fully heat-treated and cryogenically stress-relieved aluminum forging, before hand finishing to final dimensions. All critical interface points are 100% compatible with mil-spec select-fire ar-15/m16/m4 components and lower receivers, and will fit most commercial semi-auto lowers. A slick, dry-lube coating over the hard-anodized finish further guards against surface wear and helps ensure smooth operation of bolt/carrier and other internal components. Comes with true mil mfg: vltor weapon systems specs: 7075 t6 aluminum, type iii, class 2 hardcoat anodized, dry lube coating, matte black. .250" dia. Pivot/takedown pin holes. US specification & reliable quality rifle upper receivers by Vltor. Part Nr: MUR1A.
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Dpms Lr 308 Oracle Upper Receiver Assembly US Specifications
USD 657.99
(Indicative price - actual current price possibly lower)
Technical data & information: Ready to install .308/7.62 nato upper receiver comes fully assembled with bolt/carrier, charging handle, free-float handguard, gas block, and barrel. Lets you change your lr-308 from a sporter to a match rifle or long-range varminter in just minutes-or build a completely new gun customized to your exact needs beefy, thick-walled receiver of extruded 6066 t6 aluminum is hardcoat anodized to military standards for extra surface strength, with a hard, black teflon coating to resist scuffs and scratches. Free-floated forend of smooth, rigid machined aluminum gives plenty of air space to protect your hand from a hot barrel during sustained shooting. Includes swivel stud and qd sling swiv mfg: dpms specs: receiver/handguard/gas block/charging handle 6066 t6 aluminum, anodized and teflon coated, black. Bolt/carrier 4140 steel, parkerized, matte black. Barrel 4140 chrome-moly steel, parkerized, matte black, or 416 stainless steel, natural finish. Fits dpms lr-308 lower. US specification & reliable quality rifle upper receivers by DPMS. Part Nr: 60603.
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Knights Armament Sr 15 E3 Mod 2 Upper Receivers M Lok Ar 15 Upper Receiver Mod 2 16" Urx 4 M Lok US Specifications
USD 1894.99
(Indicative price - actual current price possibly lower)
Technical data & information: Knight's armament company, or kac, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of knight's armament sr-15 mod 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5", 14.5" 16" & 18" lengths with a mod 2 gas block, and fitted with a kac 3 prong qdc suppressor compatible flash hider. The knight's armament sr-15 mod 2 complete upper receivers feature the urx m-lok handguards that each have 2 anti-rotation qd sling swivel sockets and ev mfg: knights armament. US specification & reliable quality rifle upper receivers by Knights Armament. Part Nr: 31962.
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D.S. Arms Ar 15 Flattop Upper Receiver W/Cover & Forward Assist Upper Receiver W/Cover & Fwd Assist US Specifications
USD 102.99
(Indicative price - actual current price possibly lower)
Technical data & information: M4/a3-style upper receiver is with the forward assist and ejection port cover already installed. Precision machined from a 7075 t6 aluminum alloy forging to usgi dimensions, and ready to mate with the mil-spec lower and internal components of your choice. Includes m4-type feed cuts and alphanumeric position markers stamped into the rail slots. Hardcoat anodized to resist wear, add strength, and protect from corrosion. Hard dry-lube surface treatment protects the anodizing from scuffs and reduces friction between bolt carrier and receiver walls for ultra-smooth operation, less wear, and longer service life. Mfg: d.S. Arms specs: 7075 t6 aluminum, hardcoat anodized, dry-lube finish, matte black. .250" takedown/pivot pin holes. Steel forward assist and ejection port cover; black oxide finish. US specification & reliable quality rifle upper receivers by DS. Part Nr: DSZM4R2C.
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Knights Armament Sr 15 E3 Mod 2 Upper Receivers M Lok Ar 15 Upper Receiver Cqb Mod 2 11.5" Urx 4 M Lok US Specifications
USD 1962.99
(Indicative price - actual current price possibly lower)
Technical data & information: Knight's armament company, or kac, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of knight's armament sr-15 mod 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5", 14.5" 16" & 18" lengths with a mod 2 gas block, and fitted with a kac 3 prong qdc suppressor compatible flash hider. The knight's armament sr-15 mod 2 complete upper receivers feature the urx m-lok handguards that each have 2 anti-rotation qd sling swivel sockets and ev mfg: knights armament. US specification & reliable quality rifle upper receivers by Knights Armament. Part Nr: 31963.
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Aero Precision M4e1 Assembled Upper Receiver 5.56 Mid Length M4e1 Assembled Gen 2 Upper Receiver 14.5 Mid Length US Specifications
USD 379.99
(Indicative price - actual current price possibly lower)
Technical data & information: Aero precision's m4e1 5.56mm mid-length upper receiver comes fully assembled, lacking only a bolt/carrier group and charging handle, the two components most often replaced by customizers. "mid-length" refers to the gas tube, which is longer than the standard carbine tube to slow down gas velocity and actually improve reliability in cycling. This is actually a carbine upper, available with either a military 14.5" or civilian 16" barrel (see gun tech note below). The core of the m4e1 5.56mm mid-length upper receiver is aero's forged m4e1 receiver that combines the looks of a machined receiver with "mil-spec" parts compatibility (including bcg mfg: aero precision. US specification & reliable quality rifle upper receivers by Aero Precision. Part Nr: APAR640231M5.
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J P Enterprises Ar 15 Psc 11 Side Charge Gunsmith Kit Lomass US Specifications
USD 854.99
(Indicative price - actual current price possibly lower)
Technical data & information: Features: the psc-11 includes the standard ar-15/m16 charging handle along with the jp side charging handle includes ejection port cover and hardware forward assist and hardware available with the jp low mass includes jp enhanced bolt group (including bolt, cam pin, firing pin and firing pin retaining pin) jp enhanced bolt is precision machined from sae9310 nickel chromium molybdenum steel locking lugs are meticulously radiused on all 90 degree corners of the locking lugs side charging handle can be removed for cleaning side charging handle engages the bolt carrier on the front side, opposite the extractor low mass bolt carrier mfg: j p enterprises. US specification & reliable quality rifle upper receivers by JP. Part Nr: JPPSCURA3.
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D.S. Arms Ar 15 Flattop Upper Receiver Stripped Flattop Upper Receiver US Specifications
USD 77.99
(Indicative price - actual current price possibly lower)
Technical data & information: M4/a3-style upper receiver is available stripped. Precision machined from a 7075 t6 aluminum alloy forging to usgi dimensions, and ready to mate with the mil-spec lower and internal components of your choice. Includes m4-type feed cuts and alphanumeric position markers stamped into the rail slots. Hardcoat anodized to resist wear, add strength, and protect from corrosion. Hard dry-lube surface treatment protects the anodizing from scuffs and reduces friction between bolt carrier and receiver walls for ultra-smooth operation, less wear, and longer service life. Mfg: d.S. Arms specs: 7075 t6 aluminum, hardcoat anodized, dry-lube finish, matte black. .250" takedown/pivot pin holes. US specification & reliable quality rifle upper receivers by DS. Part Nr: DSZM4A3UM4.
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Radical Firearms Ar 15 16" Upper Assy 300 Blk Hbar Std Keymod Rail No Bcg Or Ch US Specifications
USD 269.99
(Indicative price - actual current price possibly lower)
Technical data & information: Radical firearms 300 blackout 16" hbar radical upper receiver is a flat top, 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 assembled with upper receiver, forward assist, ejection port door, and barrel nut. 16" hbar profile barrel and a2 flash hider. 16" hbar melonite barrel 4150v chrome moly 1 in 8" twist rate 300 aac blackout chamber 5/8x24 thread pitch hpt/mpi m4 feed ramps low profile micro gas block stainless pistol-length gas system (this will cycl mfg: radical firearms. US specification & reliable quality rifle upper receivers by Radical. Part Nr: FU16300HBAR12.
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Aero Precision 308 Ar M5 Upper Receiver US Specifications
USD 109.99
(Indicative price - actual current price possibly lower)
Technical data & information: Forged from 7075-t6 aluminum, the aero precision m5 308 upper receiver is a great platform for a big-bore ar build. Precision machined to aero precision's specifications, the upper features m4 feedramps and a matte black hard coat anodized mil 8625 type 3 class 2 finish. Dpms pattern takedown holes (.2795") allows for compatibility with a wide range of lower receivers. Receiver is compatible with standard dpms pattern 308 components, including lowers, bolt carriers, charging handles and barrels. Comes with forward assist and ejection port cover installed. Works with dpms high profile handguards. Mfg: aero precision specs: fits, dpms pattern 308 parts, including barrel, bolt carrier, charging handle and lower. Weight 14.1 oz. US specification & reliable quality rifle upper receivers by Aero Precision. Part Nr: APAR308503AC.
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Stern Defense Ar 15 Sd Mod 4 9mm Upper Receiver M Lok Complete Sd Mod 4 9mm Upper Receiver 16.1in M Lok Complete Black US Specifications
USD 544.99
(Indicative price - actual current price possibly lower)
Technical data & information: The stern defense sd mod 4 9mm upper receiver is a complete, ready to go, upper receiver solution for those looking to spend less time building and more time shooting. The 16.1 inch, 1-10 twist, melonited barrel, is free float in a 12in m-lok handguard attached to a 7075-t6 forged aluminum receiver. 16.1in barrel 12in m-lok free float handguard complete assembly with 9mm bolt and charging handle β½-36 muzzle thread pitch sd bu9 9mm bolt cartridge: 9mm nato included in the upper receiver is charging handle and the stern defense 9mm bolt which is compatible with both glock and colt smg magazines, has a melonite finish, and is works in c mfg: stern defense, llc. US specification & reliable quality rifle upper receivers by Stern. Part Nr: 015SD15INCHMOD4.
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Radical Firearms Ar 15 Upper Receiver Assembly 300 Blackout 16" Ar 15 Upper 300blk 16" Hbar Pistol Gas 12" Fgs Handguard US Specifications
USD 239.99
(Indicative price - actual current price possibly lower)
Technical data & information: The radical firearms 300 blackout hbar 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 1-8 twist & is chambered in 300 blackout. Upper & barrel feature m4 feed ramps. Mfg: radical firearms. US specification & reliable quality rifle upper receivers by Radical. Part Nr: FU16300HBAR12.
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