Upper Receivers and Parts

Caliber: 5.56Barrel Length: 13"Twist: 1:7"

Caliber: 300 BlackoutBarrel Length: 13"Twist: 1:5"

This receiver is manufactured with strict quality control, plus features an ejection port cover, forward assist, and an integral picatinny rail that extends the length of the handguard.There is a combat grade barrel at the heart of the m4-89, which is...

The complete upper is constructed of billet machined 7075-t6 aluminum with proprietary extended aluminum hand guard w/ magpul m-lok mounting system and integrated upper/hand guard stainless steel anti-rotation pin.Its match grade 416r stainless steel...

Agency Arms was created in January of 2015 and created by weapons operators themselves interested more in the functionality than the visual appeal. Agency Arms is a Veteran and LEO owned establishment that specializes in after market weapon modifications...

Agency Arms was created in January of 2015 and created by weapons operators themselves interested more in the functionality than the visual appeal. Agency Arms is a Veteran and LEO owned establishment that specializes in after market weapon modifications...

The GEMTECH INTEGRA upper series is the most advanced Integrally Suppressed Upper Receiver available. They have teamed up with NEMO Arms to create the smallest and easiest to maintain package the world has ever seen. The INTEGRA utilizes GEMTECH's proven...

This complete kit will convert any MIL-SPEC AR-15/M4 Lower into the top-performing MCX-SPEAR LT.

Primary Weapons Systems Mk107 Mod 2 Upper 7.62x39 7.75" Black Mlok Ar-15 2m107uf01-1f Anodized

Geissele Automatics Complete Upper, Super Duty Mod1, 556nato, 11.5" Cold Hammer Forged Barrel, Chrome Lined, 1:7 Twist, Anodized Finish, Black, Flat Top, Huxwrx Flash Hider-qd Muzzle Device 08-544b

Geissele Automatics Complete Upper, Super Duty Mod1, 556nato, 10.3" Cold Hammer Forged Barrel, Chrome Lined, 1:7 Twist, Anodized Finish, Desert Dirt Color, Flat Top, Huxwrx Flash Hider-qd Muzzle Device 08-543s

Cmmg Dissent, Mk4, Complete Upper Receiver, 300 Blackout, 10.5" Threaded Barrel, 5/8x24, Cmmg Zeroed Linear Compensator, Cerakote Finish, Midnight Bronze, M-lok Free Float Handguard, Fits Ar-15 Lower Receiver, Includes 1913 Picatinny Rail End Plate...

Born from the SOCOM PDW solicitation, the NEW Maxim Defense PDX(TM) U.R.G. is designed to handle the fierce demands of the Tier 1 community. The PDX(TM) U.R.G. dominates in close quarter encounters and achieves maximum energy on target without...

Maxim Defense Industries Pdx Urg, Complete Upper Receiver, 7.62x39, 5.5" Barrel, Anodized Finish, Bolt Carrier Assembly And Charging Handle, M-lok Compatible Handguard, Hatebrake Muzzle Brake Mxm-50814Model: PDX URGProduct Type: UpperAccessories: Bolt...

Maxim Defense Industries Pdx Urg, Complete Upper Receiver, 5.56nato, 5.5" Barrel, Anodized Finish,Bolt Carrier Assembly And Charging Handle, M-lok Compatible Handguard, Hatebrake Muzzle Brake Mxm-50816Model: PDX URGProduct Type: UpperAccessories: Bolt...

Maxim Defense Industries Pdx Urg, Complete Upper Receiver, 300blk, 5.5" Barrel, Anodized Finish, Bolt Carrier Assembly And Charging Handle, M-lok Compatible Handguard, Hatebrake Muzzle Brake Mxm-50828Model: PDX URGProduct Type: UpperAccessories: Bolt...

The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to create a weapon that seamlessly blends form and function. Beyond quality and...

The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to create a weapon that seamlessly blends form and function. Beyond quality and...

The Daniel Defense M4A1 Upper Receiver Group features the M4A1 Rail Interface System (RIS II), which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005. This two-piece, free-floating rail system allows...

Primary Weapons Systems Mk114 Mod 2-m, Upper Receiver, 223 Wylde, 14.5" Barrel, No Muzzle Device, Anodized Finish, Black, Mlok Handguard, Long Stroke Piston System, Adjustable Gas System, Fits Ar-15 2m114ua01-2f-nc

Barrett Mrad Barrel Conversion Kit, 338lap, 26, 10rd 19149

Barrett Mrad Barrel Conversion Kit, 6.5 Creedmoor, 24" Fluted Barrel, 10rd Magazine 18529

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 16" Barrel, 1:7 Twist, Huxwrx Flash Hider-qd 556, 15" Smr Mk16 M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 14.5" Pinned (16" Oal) Barrel, M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits Ar-15, Anodized Finish, Black...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 13.9" Pinned (16" Oal) Barrel, M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits Ar-15, Anodized Finish, Black...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 13.9" Pinned (16" Oal) Barrel, M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits Ar-15, Anodized Finish, Desert...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 16" Barrel, 1:7 Twist, Huxwrx Flash Hider-qd 556, 15" Smr Mk16 M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 14.5" Pinned (16" Oal) Barrel, M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanoweapon Reliability Enhanced Bolt Carrier Group, Fits Ar-15, Anodized Finish, Desert...

Geissele Automatics Super Duty Mod1 Upper 556nato 11.5" Black 1:7 Flat Top 08-544b Anodized

Geissele Automatics Complete Upper, Super Duty Mod1, 556nato, 11.5" Cold Hammer Forged Barrel, Chrome Lined, 1:7 Twist, Anodized Finish, Desert Dirt Color, Flat Top, Huxwrx Flash Hider-qd Muzzle Device 08-544s

Geissele Automatics Urg-1, Near Clone, Complete Upper Receiver, 556nato, 14.5" Barrel, 1:7 Twist, Pinned And Welded Surefire 4 Prong Flash Hider, Desert Dirt Color 13.5" Smr Mk16 M-lok Free Float Handguard, Desert Dirt Color Geissele Airborne Charging...

Geissele Automatics Urg-1, Near Clone, Complete Upper Receiver, 556nato, 11.5" Barrel, 1:7 Twist, Pinned And Welded Surefire 4 Prong Flash Hider, Desert Dirt Color 10.5" Smr Mk16 M-lok Free Float Handguard, Desert Dirt Color Geissele Airborne Charging...

Geissele Automatics Super Duty Mod1, Complete Upper Receiver, 556nato, 12.5" Cold Hammer Forged Barrel, 1:7 Twist, Huxwrx Flash Hider-qd Muzzle Device, M-lok Free Float Handguard, Geissele Airborn Charging Handle, Nanowepon Reliability Enhanced Bolt...

Geissele Automatics Urg-1, Near Clone, Complete Upper Receiver, 556nato, 10.3" Barrel, 1:7 Twist, Pinned And Welded Surefire 4 Prong Flash Hider, Desert Dirt Color 9.3" Smr Mk16 M-lok Free Float Handguard, Desert Dirt Color Geissele Airborne Charging...

Chainsaw will now be Noveskes forged product offering based on a hybrid of their Gen 1 and Gen 4 designs. They have modified the basic M4 look to match the Gen 4 aesthetic lines and smooth fit. Noveske will offer Chainsaw in three barrel lengths and two...

Nove Upper, 762nato, 9mm, 12.5", Black, Mlok, Ar-15, Anodized 03002552Product Type: UpperFinish/Color: AnodizedFit: AR-15Description: MLOKCaliber: 762NATO

Primary Weapons Systems Mk109, Mod 2-m, Upper Receiver, Fits Ar-15, 300 Blackout, 9.75" Barrel, 1:8" Twist, Pws Triad Muzzle Device, 8.9" Pws Piclok Mlok Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle 2m109ub01-1f

Steyr Arms Ssg M1, Conversion Kit, 338lap, 27.2, Fde E6201100001daModel: SSG M1Caliber: 338 Lapua

The PWS MK1 MOD 2-M line, revamped for 2018" features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok...

Primary Weapons Systems Mk111 Mod 2-m, Upper Receiver, 7.62x39, 11.85" Barrel, Triad30 Muzzle Device, Anodized Finish, Black, Mlok Handguard, Long Stroke Piston System, Adjustable Gas System, Fits Ar-15 2m111uf01-1f

Noveske Noveske9, Gen 4, Complete Upper, 9mm, 16" Barrel, Nsr 15 Rail, Cerakote Finish, Black 03000446Model: Noveske9Product Type: UpperFinish/Color: CerakoteFit: AR-15Description: MLOKCaliber: 9MM

The PWS MK1 MOD 2-M line features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok technology on the free...

Nove Upper, 300 Blackout, 10.5", Black 03002569Product Type: UpperCaliber: 300 Blackout

This Daniel Defense M4A1 FSP AR15 style Upper Receiver Group was built for customers wanting a firearm inspired by USSOCOM SOPMOD Block II. This upper features the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth, a 14.5" M4 profile barrel,...

Nove Upper, Complete, 4th Generation, N4, 5.56, 13.7 Light Infidel Chf, Nsr 15 (m-lok), Blk Cerakote, Super Badass Charging Handle, Kx3 1/2-28 (pinned), With Packaging 03002695

Lantac Usa Llc Sf 15 Dmr, Complete Upper Receiver, 223 Wylde, 18" Barrel, Fits Ar15, Anodized Finish, Black 01-fa-223-dmr-uprModel: DMRFinish/Color: AnodizedFit: AR-15Caliber: 223 Wylde

Primary Weapons Systems Mk107 Mod 2-m, Upper Receiver, 7.62x39, 7.75" Barrel, Cqb 30 Muzzle Device, Anodized Finish, Black, Mlok Handguard, Long Stroke Piston System, Adjustable Gas System, Fits Ar-15 2m107uf01-1f

Noveske N4, Gen 4, Complete Upper, 556 Nato/223 Remington, 18" Spr Barrel, Nsr 15 Rail, Cerakote Finish, Flat Dark Earth 03002557-fdeProduct Type: UpperFit: AR-15Caliber: 223 Remington

The pw mk1 mod 2-m line features the pws long stroke piston system.While the internals remain the same as other pws lines, the mk1 mod 2-m offers a variety of features exclusive to this line.Starting with patent pending piclok technology on the free...

Caliber: 22 ARC

The radian model 1 upper receiver and hand guard are precision cnc machined as a matching set, structurally reinforced in critical areas for improved strength and rigidity.The upper receiver is cut from billet 7075-t6 aluminum and assembled with dust...

Radian Weapons R0023 Complete Upper 223 Wylde 10.50" Black Barrel, 7075-T6 Aluminum Radian Black Receiver, Extended with Magpul M-LOK Handguard for AR-15

Knight's sr-15 e3 mod 2 series 5.56mm nato barrel is manufactured for military grade durability, and is free-floated inside a urx4 m-lok handguard.An improved e3 round-lug bolt design both enhances function and increases bolt life far beyond the industry...

Knight's sr-15 e3 mod 2 series 5.56mm nato barrel is manufactured for military grade durability, and is free-floated inside a urx4 m-lok handguard.An improved e3 round-lug bolt design both enhances function and increases bolt life far beyond the industry...

Knight's upper receiver kit, sr-15 cqb mod 2, features a 5.56mm nato 11.5" chrome lined barrel manufactured for military grade durability and is free-floated inside a urx4 m-lok handguard.An improved e3 round-lug bolt design both enhances function and...

The adams arms p3 is the performance, match-grade model in the p-series lineup.The p3 features a proof research carbon fiber wrapped barrel, jet comp, ambidextrous charging handle, low mass carrier, an ergonomic free float rail, and our signature...

Barrel Length: 13.70"

Barrel Length: 16"

Barrel Length: 13.70"

Its no secret that pistol stabilizing braces have been a target for scrutiny over the years, and those that enjoy building their own ar pistols have wondered what will come out of all the uncertainty.Dissent is cmmg's answer.Utilizing cmmg's patent...

Barrel Length: 13.70"

The p-415 was designed to be unstoppable in all environments.It is a product of constant development and design improvement.It's reliability has been tested time after time, and the operating system has been perfected.With the development of our e2...

Project rogue was an exercise to turn the revolution platform into the lightest.308 semi auto rifle on the market, and to do it without needless lightening cuts.The rogue features a forged receiver set, stainless steel barrel, keylock di bcg and...

The design philosophy behind the radian model 1 uses the highest quality raw materials, most precise cnc machining equipment, and best components available to create a weapon that seamlessly blends form and function.The model 1 features fully...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

The mdp-9 is designed to be light, small, yet fully functional, offering a revolutionary roller delay action that reduces recoil.Gain the peace of mind and confidence needed for protection in any situation, with the perfect balance of size and strength...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

Items included: 1x billet upper receiver w/dust cover, anti-rotation pin & light weight forward assist installed.1x hand guard w/magpul m-lok modular attachment interface.1x radian ax556 lower receiver.1x raptor-sd ambidextrous charging handle.1x...

Patriot Ordnance Factory 01269 P415 Complete Upper (Piston Driven) 5.56x45mm NATO 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard

P-415 edge upper 5.56 16.5" bk.Caliber: 223 Rem | 5.56 NATOBarrel: 16.5"Finish: Black AnodizedSights: No Sights

Patriot Ordnance Factory 01515 P415 Complete Upper (Piston Driven) 300 Blackout 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard

Radian Weapons R0024 Complete Upper 223 Wylde 14.50" Black Barrel, 7075-T6 Aluminum Radian Black Receiver, Extended with Magpul M-LOK Handguard for AR-15

The radian model 1 upper receiver and hand guard are precision cnc machined as a matching set, structurally reinforced in critical areas for improved strength and rigidity.The upper receiver is cut from billet 7075-t6 aluminum and assembled with dust...

Mr556a1 upper receiver 5.56mm.81000584.Caliber: 223 Rem | 5.56 NATOBarrel: 16.5"Finish: Matte Black

Dd4 riii urg 5.56mm 11.5" fde.23-191-02397-011.Caliber: 223 Rem | 5.56 NATOBarrel: 11.5" GovernmentFinish: Matte BlackSights: No Sights

Dd4 riii urg 5.56mm 11.5" blk.23-191-02397-006.Caliber: 223 Rem | 5.56 NATOBarrel: 11.5" GovernmentFinish: Matte BlackSights: No Sights

Ddm4 300s urg 300blk 10.3".23-088-19020-047.Caliber: 300 AAC BlackoutBarrel: 10.3" S2WFinish: Matte BlackSights: No Sights

Mk18 riii urg 5.56mm 10.3" fde.23-004-81721-011.Caliber: 223 Rem | 5.56 NATOBarrel: 10.3" GovernmentFinish: Matte BlackSights: No Sights

Mk18 riii urg 5.56mm 10.3" blk.23-004-81721-006.Caliber: 223 Rem | 5.56 NATOBarrel: 10.3" GovernmentFinish: Matte BlackSights: No Sights

Upper mk18 5.56mm ris ii fde.23-004-08013-011.Caliber: 223 Rem | 5.56 NATOBarrel: 10.3" GovernmentFinish: Flat Dark EarthSights: No Sights

Mcx-spear lt urg 7.62x39 16".Uamcx-762r-16b-lt-blk | black.Caliber: 7.62 x 39mmBarrel: 16"Finish: Black

Dd4 riii urg 5.56mm 16" fde.23-191-20088-011.Caliber: 223 Rem | 5.56 NATOBarrel: 16" GovernmentFinish: Matte BlackSights: No Sights

Dd4 riii urg 5.56mm 16" blk.23-191-20088-006.Caliber: 223 Rem | 5.56 NATOBarrel: 16" GovernmentFinish: Matte BlackSights: No Sights

Mk12 spr urg 5.56 18".23-142-10035.Caliber: 223 Rem | 5.56 NATOBarrel: 18"Finish: Matte BlackSights: No Sights

Ddm4 v7 pro urg 5.56 18".23-128-20044-047.Caliber: 223 Rem | 5.56 NATOBarrel: 18" S2WFinish: Matte BlackSights: No Sights

Upper mk18 5.56mm ris ii blk.23-004-08013-006 | 10.3" bbl.Caliber: 223 Rem | 5.56 NATOBarrel: 10.3"Finish: Black