Upper Receivers and Parts

The MK1 MOD 1-M line features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a more true to...

Includes: Stern Defense 15 inch M-LOK rail(Barrel nut, bolts etc.) Stern Defense 16.1 inch 45acp barrel. SD CB45 COMPENSATOR BREAK. Stern Defense assembled upper receiver 45 with dust cover and forward assist. Stern Defense SD BU45 Glock cut bolt. SD...

Includes: Stern Defense 15 inch M-LOK rail(Barrel nut, bolts etc.) Stern Defense 16.1 inch 9mm barrel. SCB 9 COMPENSATOR BREAK. Stern Defense assembled upper receiver with dust cover and forward assist. Stern Defense SD BU9 Glock cut bolt. SD CH1...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The proprietary UXR, or User XChange Rifle, is the pinnacle of firearm innovation. This revolutionary system offers unmatched modularity and performance. The patent-pending XCHANGE system allows the shooter to quickly convert to alternate calibers on the...

Excellent choice for short rifles in the 10"-16" range. The 9.0's length stops just past a carbine-length gas block, providing true free-float. The two-pin proprietary barrel nut system with its locking anti-slip plate, sets LaRue handguards apart from...

Includes: Stern Defense 10 inch M-LOK rail(Barrel nut, bolts etc.) Stern Defense 8.5 inch 9mm barrel. SD HBC 9MM Blast Can. Stern Defense assembled upper receiver with dust cover and forward assist. Stern Defense SD BU9 Glock cut bolt. SD CH1 enhanced...

Mil-Spec flat top upper receiver with Stern Defense laser engraved dust cover and forward assist. Machined from 7075-t6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore.

The Tacfire 5" 300 Blackout Complete Upper Assembly amplifies precision and performance utilizing an upper assembly that is expertly designed for maximal functionality. Dive into a world where impeccable features and craftsmanship merge, ensuring...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The Tacfire 10" .45 ACP Complete Upper Assembly amplifies precision and performance utilizing an upper assembly that is expertly designed for maximal functionality. Dive into a world where impeccable features and craftsmanship merge, ensuring precision...

The Tacfire 5" 7.62 X 39 Complete Upper Assembly amplifies precision and performance utilizing an upper assembly that is expertly designed for maximal functionality. Dive into a world where impeccable features and craftsmanship merge, ensuring precision...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The Aero Precision Minimal Optical Deflection (MOD) 4 handguard seamlessly blends robust construction with an ergonomic form factor, ensuring no compromises between the two. Machined from 6061-T6 aluminum, the handguard is engineered with a focus on...

The 9mm AUG Police training kit was developed to allow Austrian Police units to train with their AUGs using 9mm ammunition while maintaining the same feel and manual of arms as their 5.56x45mm duty setups. Great for training, plinking, or defense, this...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

Caliber: 5.56

Caliber: 5.56Barrel Length: 11.50"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 15"Barrel Length Range: 15" to 15.99"

Requires low profile gas block, full length mil-spec 1913 picatinny railBarrel Length: 7"Handguards: 7" M-LOKBarrel Length Range: 7" to 7.99"

Requires low profile gas blockBarrel Length: 15"Handguards: 15" M-LOKBarrel Length Range: 15" to 15.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, full length mil-spec 1913 picatinny railBarrel Length: 9"Handguards: 9" M-LOKBarrel Length Range: 9" to 9.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 15"Barrel Length Range: 15" to 15.99"

Barrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, full length mil-spec 1913 picatinny railBarrel Length: 9"Handguards: 9" M-LOKBarrel Length Range: 9" to 9.99"

Rosco Manufacturing Purebred Barrel, 6mm Arc, 14.5", Intermediate Gas System, Fits Ar-15, Matte Finish, Stainless Pb-145-spr-6mm-7.5-i

The faxon 10/22 receiver kit provides a quick and easy upgrade of your ruger 10/22, or serves as the cornerstone for your next 10/22 rifle build.Faxon 10/22 receivers are compatible with all ruger oem 10/22 non-takedown components, all faxon rimfire...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

Kak Industry Pro, 556nato, 13.9", Mid Length, Fits Ar-15, Black 121-0212-014

The quick 1:3 twist rate 8.6 blk does great with less barrel length for someone wanting to swap uppers to shoot 8.6 blk or for those wanting to start a new build.The cmmg mk3 platform is based on the popular dpms gen 1 high-pattern lr308 design.Receiver...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

Receiver Finish: Black Armor CerakoteCaliber: 8.6 BlackoutBarrel Length: 16.10"

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

The 3-slot accessory rail qd mounting point bi-pod adaptor features: slim lightweight design integrated with modular flexibility durable aircraft grade billet aluminum body barrel nut included no timing or shims required full length mil-spec 1913...

Receiver Finish: Hard Coat AnodizedBarrel Length: 16"Barrel Material: Chrome Moly VanadiumTwist: 1:9"Barrel Finish: Manganese PhosphateReceiver Description: Mil-SpecBarrel Length Range: 16" to 16.99"

Caliber: 5.56

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 15"Barrel Length Range: 15" to 15.99"

Barrel Length: 13"Barrel Length Range: 13" to 13.99"

Requires low profile gas block, two mil-spec 1913 picatinny rail sectionsBarrel Length: 15"Barrel Length Range: 15" to 15.99"

Requires low profile gas block, full length mil-spec 1913 picatinny railBarrel Length: 7"Handguards: 7" M-LOKBarrel Length Range: 7" to 7.99"

Barrel Length: 13"Barrel Length Range: 13" to 13.99"

Barrel Length: 13"Barrel Length Range: 13" to 13.99"

Featuring superior Sharps Bros, Craftsmanship, the 365 Improved X Macro Pistol kit will elevate your Sig Sauer P365. With its solid aluminum frame, ported barrel and slide, integrated compensator, and ergonomic slide serrations, all you need to do is...

Daniel Defense Barrel, 556nato, 18", Black 07-116-05191-018

Advantage Arms Conversion Kit: Convert your 9mm/.40 S&W Glock down to 22LR so trips to the range dont break the bank. Or if you want to teach your kid the fun of shooting but dont want him/her to start on the 9mm" a conversion kit is a great learning /...

Advantage Arms Conversion Kit: Convert your 9mm/.40 S&W Glock down to 22LR so trips to the range dont break the bank. Or if you want to teach your kid the fun of shooting but dont want him/her to start on the 9mm" a conversion kit is a great learning /...

Caliber: 5.56mmBarrel Length: 18"Twist: 1:8"

Caliber: 5.56

Caliber: 5.56

Caliber: 5.56mmBarrel Length: 16"Twist: 1:7"

Caliber: 5.56

Caliber: 5.56mmBarrel Length: 16"Twist: 1:7"

Caliber: 5.56mmBarrel Length: 16"Twist: 1:7"

Caliber: 5.56

Receiver Finish: Black AnodizedType: CompleteCaliber: 450 BushmasterSights: Optic ReadyBarrel Length: 16"Twist: 1:24"Barrel Finish: Black NitrideHandguards: 15" M-LOKBarrel Length Range: 16" to 16.99"

Caliber: 5.56mmBarrel Length: 18"Twist: 1:8"

Caliber: 5.56mmBarrel Length: 18"Twist: 1:8"

Made by Bravo Company MFG, Inc. (BCM) These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.

These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.

All of the same unique features and advantages of the widely favored BCM KMR Handguard, now offered in 100% Aluminum.

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM SS410 16'' Mid Length Upper Receiver Group w/ BCM MCMR-13 Handguard, 1/7.7 Twist Ionbond Finish on barrel.

Chambered in .300 Whisper, will also safely fire .300 AAC Blackout. Designed to operate with or without sound suppressor. Barrel threaded to 5/8-24. Feed ramps and gas system optimized to run efficiently with a full range of factory loaded sub-sonic...

Includes: Complete Integrally Suppressed Upper Assembly Charging Handle Bolt Carrier Assembly

Made by Bravo Company MFG, Inc. (BCM) These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.