Upper Receivers and Parts

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

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

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"

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...

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 /...

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...

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"

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...

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

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...

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.

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...

Everything you need to complete your stripped AR15 upper receiver.

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

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.

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.

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.

The S&W M&P15 Complete AR-15 Upper is what you need to complete your AR-15 Rifle. This upper is chambered in .223 Rem/5.56 NATO, the barrel is 16 in length, and the barrel has a 1/8 twist. This upper comes with a 10 free float quad rail, Magpul MBUS...

It matches any of the Sharps Bros. lower receivers perfectly, and it also matches the lines of their handguards perfectly as well. This receiver is meant for .223, 5.56, 300 BLK and 6.5 Grendel calibers.  Port opening is not large enough for 450...

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

Upper Group features: BCM SS410 16'' Mid Length Upper Receiver Group w/ BCM KMR ALPHA 13'' Handguard, 1/7.7 Twist Ionbond Finish on barrel.

Continuous taper barrel profile designed for optimal weight, balance, and performance. Barrel profile fluted toward the rear near chamber area - Increases strength and heat dissipation. Tapered barrel profile out front, for easier maneuverability. No...

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.

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