Hunting & Archery Equipment › colt m4 5 56 upper

Colt M4 5.56 Upper Receiver Groups - M4 Le6920 Upper Group 16in Stripped

Add the Colt legend of reliability to your rifle or build with these complete feature 1/7 RH twist in a chrome lined, button rifled barrel. Available with or without a charging handle, bolt carrier group, and back up sights. All NFA rules apply. NOTE:... more

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 9.5in F-9-ML-O2

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 9.5in F-9-ML-O2. Designed to work with DPMS pattern uppers the forend works with both high(2.06in) and low(2.00in) profiles. The O2 Lite is the latest and lightest of all the... more

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 15.5in F-15-ML-O2

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 15.5in F-15-ML-O2. Designed to work with DPMS pattern uppers the forend works with both high(2.06in) and low(2.00in) profiles. The O2 Lite is the latest and lightest of all the... more

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 12.5in F-12-ML-O2

ODIN Works O2 Lite Free Float .223/5.56 M-LOK Forend QD Low Profile Black 12.5in F-12-ML-O2. Designed to work with DPMS pattern uppers the forend works with both high(2.06in) and low(2.00in) profiles. The O2 Lite is the latest and lightest of all the... more

Colt Enhanced Patrol Rifle Epr 5.56 M4 Upper Receiver Groups - M4 Le6933 Epr Upper Group 11.5in With

The Colt EPR, or Enhanced Patrol Rifle, line of M4 Upper Receivers that come with Centurion Arms free float M-LOK handguards, making for a convenient and practical upper receiver ready to drop on your AR-15 lower receiver. Available in 3 different... more

Aero Precision Ar-15/M16 Assembled Upper Receiver - 5.56x45 Nato Assembled Upper Receiver For Ar-15

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... more

Colt 14.5" M4 Socom Barrel Assembly - 14.5" M4 Socom Barrel Assembly With Sight Tower

Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and �-28 threads for a muzzle device. All NFA rules apply. Site towers are not "F" marked Mfg: Colt SPECS:... more

Aero Precision Ar-15/M16 Stripped Upper Receiver - 5.56x45 Nato Stripped Upper Receiver For Ar-15 Fd

The Aero Precision Stripped Upper Receiver is machined from 7075 aircraft aluminum for superior strength and features a super tough, Type 3 hardcoat anodized finish for excellent wear resistance. Black 7075-T6 Aluminum M4 Feedramps .250 Takedown pin... more

Satern Ar-15 Bore Guide - .223/5.56 Bore Guide

Clean your AR-15 from the breech to prevent muzzle or chamber damage. Insert into the upper receiver, replacing the bolt carrier, for safe and easy cleaning. Self-centers in the receiver. O-ring seal at breech and solvent port keeps chemicals out of... more

Geissele Automatics Hk Mr 5.56 Trigger

The HK MR 556 Trigger is similar to the Geissele SSA trigger with a 4.5lb total pull weight. It can be used in both the HK 556 and sem-auto HK 416's. A 2-stage, non-adjustable standard M4 curved trigger. Mfg: Geissele Automatics more

Faxon Firearms Ar-15 5.56 Gov'T/Socom Barrels - Ar-15/M16 10.5" Socom Barrel 4150 Qpq Carbine .750

Faxon's Gov't / SOCOM 5.56 AR-15 barrel profile is a mix of the standard M4 profile and a heavy profile - skinny behind the gas block with a thicker O.D. ahead of it for a good balance of rigidity (for accuracy) and manageable weight. Machined from... more

Wilson Combat Ar-15/M16 Marked Ejection Port Covers - Ar15/M16 Ejection Port Cover 5.56 Nato

These Wilson Combat AR-15 Ejection Port Covers give you the ability to quickly identify upper receivers of various calibers. Finished in Black Armor-Tuff, the covers feature the caliber of your choice. Replaces your existing ejection port cover.... more

Cmmg Ar-15/M16 22lr Dedicated Barrel - Ar15 9.2" 22lr Barrel W/ Collar

M4-contour barrel converts a standard .223/5.56 upper receiver to a dedicated .22 LR upper when used in conjunction with a CMMG, Ciener, or other Atchison-style .22 rimfire conversion kit (sold separately) and magazine (CMMG or Black Dog). Solves the... more

Spikes Tactical Upper 5.56 16in M4 LE w/12in BAR2 Rail STU5025-R2S

Spikes Tactical Upper 5.56 16in M4 LE w/12in BAR2 Rail STU5025-R2S. 56 M4 Carbine 16in Forged Upper Receiver right into your current build to create a powerful and reliable firearm for sport shooting self-defense or tactical needs. These AR15 Upper... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 11.5in 10.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 11.5in 10.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black. 56 Half Complete Upper Receiver then you have turned up at the right location.. Formulated using some of the... more

AIM Sports Inc Complete AR Pistol Upper Receiver w/ BCG 5.56 NATO 10.5in Barrel M4 Profile Carbine 1-8 Twist 1/2x28 Thread 10M-LOK Free Float

AIM Sports Inc Complete AR Pistol Upper Receiver w/ BCG 5.56 NATO 10.5in Barrel M4 Profile Carbine 1-8 Twist 1/2x28 Thread 10M-LOK Free Float. . Developed by using several of the most extremely heavy duty and dependable resources in existence these... more

Radical Firearms Complete Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 Flash Hider w/BCG and CH Black CFU16-5.56SOC-15MHR

Radical Firearms Complete Upper Assembly 16 inch 5.56 SOCOM mid 15 inch MHR A2 Flash Hider w/BCG and CH Black CFU16-5.56SOC-15MHR. 56mm is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced shooter... more

OP Exclusive Moriarti AR-15 Pencil Upper Receiver Assembly 5.56x45mm NATO 16in Mid M-LOK 1-7 Twist 1/2x28 Thread Diamond Cut Free-Float Handgrd Tri

OP Exclusive Moriarti AR-15 Pencil Upper Receiver Assembly 5.56x45mm NATO 16in Mid M-LOK 1-7 Twist 1/2x28 Thread Diamond Cut Free-Float Handgrd Tri. 56 NATO 16in Diamond Cut 12in MLOK Upper Assembly/Triport was created in order to be the ideal product... more

Aero Precision Complete Upper Receiver M4E1-E 16in 5.56 M4 Barrel Quantum 15in M-LOK Handguard Anodized Black APAR640105M6

Aero Precision Complete Upper Receiver M4E1-E 16in 5.56 M4 Barrel Quantum 15in M-LOK Handguard Anodized Black APAR640105M6. These AR15 Upper Receivers by Aero Precision are designed for M4E1 spec receivers and are precision machined. This Aero... more

Spikes Tactical Upper 5.56 16in M4 LE w/MOE FDE SL Handguard STU5025-SLF

Spikes Tactical Upper 5.56 16in M4 LE w/MOE FDE SL Handguard STU5025-SLF. 56 M4 Carbine 16in Forged Upper Receiver right into your current build to create a powerful and reliable firearm for sport shooting self-defense or tactical needs. These AR15... more

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas... more

Moriarti AR-15 5.56 Nato M4 Carbine Diamond Cut 12in MLok Upper Assembly A2 Black 16in MAR-5.56-16-12-M4

Moriarti AR-15 5.56 Nato M4 Carbine Diamond Cut 12in MLok Upper Assembly A2 Black 16in MAR-5.56-16-12-M4. 56 Nato 16in M4 Carbine Diamond Cut 12in MLok Upper Assembly then you've found yourself in the absolute appropriate location.. These AR15 Upper... more

Ghost Firearms Vital Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Birdcage

Ghost Firearms Vital Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Birdcage. 56 Complete Upper Receiver w/Pistol Lower Parts Kit has everything you need to complete your new... more

Ghost Firearms Vital Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2 Birdcage

Ghost Firearms Vital Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2 Birdcage. 56 Complete Upper Receiver w/Pistol Lower Parts Kit has everything you need to complete your new lower... more

Aero Precision AR15 Complete Upper 16in 5.56 M4 Carbine Barrel w/ Pinned FSB M4 Handguard Includes BCG & CH Anodized Black APAR505721

Aero Precision AR15 Complete Upper 16in 5.56 M4 Carbine Barrel w/ Pinned FSB M4 Handguard Includes BCG & CH Anodized Black APAR505721. 56 NATO complete upper receiver from Aero Precision. These Mil-Spec AR15 Upper Receivers are built from tough 4150... more

Bushmaster M4 Type Patrolman 5.56 NATO/.223 REM Upper Receiver 25in Length16in Barrel 1/7 Twist Rate M4 A2 Birdcage Black 00-40004-BLK

Bushmaster M4 Type Patrolman 5.56 NATO/.223 REM Upper Receiver 25in Length16in Barrel 1/7 Twist Rate M4 A2 Birdcage Black 00-40004-BLK. Durable and Reliable Platform. Specifications for Bushmaster M4 Type Patrolman 5.56 NATO/.223 REM Upper Receivers:... more

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard FDE Cerakote APAR700715M6

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard FDE Cerakote APAR700715M6. Specifications for Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 13.7in 13in Combat Barrel M89 Rail P/W NOX9 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 13.7in 13in Combat Barrel M89 Rail P/W NOX9 Flash Hider No BCG or CH Black. 56 Half Complete Upper Receiver then you have turned up at the right location.. Formulated using some of the... more

Radical Firearms RF Upper Assembly 7.5in 5.56 M4 Contour 1/7 Twist 7in RPR M-LOK A2 Flash Hider Black FU7.5-5.56M4-7RPR

Radical Firearms RF Upper Assembly 7.5in 5.56 M4 Contour 1/7 Twist 7in RPR M-LOK A2 Flash Hider Black FU7.5-5.56M4-7RPR. We have always taken these designs and tried to capture the same aesthetics and performance with our own version of a free float... more

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 16in 5.56 Mid-Length Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized

Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 16in 5.56 Mid-Length Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized. By combining our lightest handguards and barrel profiles with the No Forward Assist Upper Receiver... more

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III. 750 Micro Gas Block andPistol Gas System DSI 7.5" SOCOM 5.56 Threaded 1:7 Nitrite Barrel andDSI... more

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700305M6

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 15in M-LOK ATLAS S-ONE Handguard Anodized Black APAR700305M6. Specifications for Aero Precision M4E1 16in 5.56 ATLAS S-ONE M-LOK Complete Upper Receiver with Flash Hider: Manufacturer:... more

Aero Precision AR15 Complete Upper Receiver 16in 5.56 Mid-Length Barrel w/ Pinned Front Sight Base M4 Handguard Black APAR505631

Aero Precision AR15 Complete Upper Receiver 16in 5.56 Mid-Length Barrel w/ Pinned Front Sight Base M4 Handguard Black APAR505631. 56 NATO complete upper receiver from Aero Precision. These Mil-Spec AR15 Upper Receivers are built from tough 4150 Chrome... more

Ghost Firearms Complete Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Butt Stock 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2

Ghost Firearms Complete Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Butt Stock 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2. 56 NATO Complete Upper Receiver w/ Rifle Lower Parts Kit is packed with high-quality parts that will help... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-EXO3 5.56mm 13.7in 13in Combat Barrel EXO3 Rail P/W NOX9 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-EXO3 5.56mm 13.7in 13in Combat Barrel EXO3 Rail P/W NOX9 Flash Hider No BCG or CH Black. 56 Half Complete Upper Receiver then you have found yourself in the absolute right location.. Formulated... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 12.5in 11.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 12.5in 11.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black. 56 Half Complete Upper Receiver then you have turned up at the right location.. Formulated using some of the... more

Aero Precision Complete Upper w/ No Forward Assist M4E1-T 5.56 8in 5.56 Pistol Barrel RM7.3 Anodized Black APAR712701M102

Aero Precision Complete Upper w/ No Forward Assist M4E1-T 5.56 8in 5.56 Pistol Barrel RM7.3 Anodized Black APAR712701M102. 56 Complete Upper with Flash Hider w/ No Forward Assist then you've found yourself in the right spot.. These AR15 Upper Receivers... more

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 105in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700702M2

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 105in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700702M2. The R-ONE handguards are designed with size and weight in mind while still providing plenty of... more