Geissele Super Duty Stripped Upper Receiver 5.56mm 11.5in Barrel Carbine Length 1-7 Twist Black 11.5in 08-245B

Daniel Defense Mk12 Spr 18" 5.56mm Nato Upper Receiver Black - Mk12 Spr 18" 5.56mm Nato 1-7 12" Ddm4

The MK12 Upper Receiver from Daniel Defense is built around an 18" stainless steel barrel, engineered with a rifle-length direct impingement gas system and utilizing the MK12 gas block, which is built to Crane Specifications for USSOCOM. The Daniel... ... more

Geissele Automatics Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 16 Super Duty Strippe

The Geissele Super Duty Upper (Stripped) features the quality and worksmanship you've come to expect from the Geissele name. At the heart of this stripped upper is a Super Duty upper receiver that mates to a MK16 Super Modular rail via a center... ... more

Geissele Automatics Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 16 Super Duty Strippe

The Geissele Super Duty Upper (Stripped) features the quality and worksmanship you've come to expect from the Geissele name. At the heart of this stripped upper is a Super Duty upper receiver that mates to a MK16 Super Modular rail via a center... ... more

Geissele AR-15 Super Duty Stripped Upper Receiver Assembly 5.56x45mm 16" Cold Hammer Forged Barrel M-LOK

The Geissele Super Duty Upper (Stripped) features the quality and workmanship you've come to expect from the Geissele name. At the heart of this stripped upper is a Super Duty upper receiver that mates to an MK16 Super Modular rail via a center... ... more

Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 5.56x45mm 11.5" Cold Hammer Forged Barrel M-LOK

The Geissele Super Duty MOD1 Upper features the latest in weapon technology available exclusively from Geissele Automatics. This complete upper chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle device mounted to a Manganese... ... more

Geissele AR-15 Super Duty MOD1 Upper Receiver Assembly 5.56x45mm 14.5" Cold Hammer Forged Barrel M-LOK

The Geissele Super Duty MOD1 Upper features the latest in weapon technology available exclusively from Geissele Automatics. This complete upper chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle device mounted to a Manganese... ... more

Geissele Super Duty Stripped Upper Receiver 5.56mm 16.5in Barrel Carbine Length 1-7 Twist Sand 16in 08-247S

Geissele Super Duty Stripped Upper Receiver 5.56mm 16.5in Barrel Carbine Length 1-7 Twist Sand 16in 08-247S. At the heart of this stripped upper is a Super Duty upper receiver that mates to a 15" MK16 Super Modular rail via a center aligning tab... ... more

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length R-One M-LOK Handguard FDE APAR712713M29

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length R-One M-LOK Handguard FDE APAR712713M29. The R-ONE line of handguards are designed with size and weight in mind providing the perfect addition to your lightweight build. The... ... more

Luth-AR A3 Complete Upper Receiver Assembled 11.5in Government Profile Barrel 5.56mm 1-7 Twist 1/2 x 28 Thread A2 Flash Hider w/ F Marked FSB and

Luth-AR A3 Complete Upper Receiver Assembled 11.5in Government Profile Barrel 5.56mm 1-7 Twist 1/2 x 28 Thread A2 Flash Hider w/ F Marked FSB and. 5? M4 SOCOM profile barrel with F Marked Front Sight Base 5.56mm made from 4150 CMV steel with a 1-7?... ... more

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length S-One M-LOK Handguard Black APAR712102M29

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length S-One M-LOK Handguard Black APAR712102M29. 5in 5.56 w/ ATLAS S-ONE w/ A2 Flash Hider Handguard Complete Upper Receiver. Each of these AR15 Upper Receivers by Aero Precision... ... more

Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 20in 11.5in HBAR Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized

Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 20in 11.5in HBAR Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized. 56mm Lightweight barrel made from 4150 Chrome Molly with a 1-9 twist mated to Luth-AR A3 Flattop receiver... ... more

Daniel Defense Upper Receiver w/Flash Hider Assembly DD4 RIIIS URG 5.56x45 20.5in 11.5in BRRL Gov Profile Carbine 1-7 1/2x28 MLOK Flash Suppressor

Daniel Defense Upper Receiver w/Flash Hider Assembly DD4 RIIIS URG 5.56x45 20.5in 11.5in BRRL Gov Profile Carbine 1-7 1/2x28 MLOK Flash Suppressor. 5 inch Cold Hammer Forged Government Profile barrel with a Daniel Defense Flash Suppressor a GRIP-N-RIP... ... 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

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length S-One M-LOK Handguard FDE APAR712112M29

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 11.5in Carbine Length S-One M-LOK Handguard FDE APAR712112M29. 5in 5.56 w/ ATLAS S-ONE w/ A2 Flash Hider Handguard Complete Upper Receiver. Each of these AR15 Upper Receivers by Aero Precision... ... more

Sons of Liberty Gun Works Threaded Barrel 5.56 Chamber 11.5in Combat V2 Profile Carbine Gas 1/2x28 1-7 Twist QPQ Black 11.5COMBATV2-CHF-556

Sons of Liberty Gun Works Threaded Barrel 5.56 Chamber 11.5in Combat V2 Profile Carbine Gas 1/2x28 1-7 Twist QPQ Black 11.5COMBATV2-CHF-556. With the significantly increased chamber support our V2 contour barrels are better suited for modern... ... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-EXO3 5.56mm 11.5in 10.5in Combat Barrel EXO3 Rail A2 Flash Hider No BCG or CH Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-EXO3 5.56mm 11.5in 10.5in Combat Barrel EXO3 Rail A2 Flash Hider No BCG or CH Black. 56 Half Complete Upper Receiver then you have found yourself in the absolute right location.. Formulated... ... more

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash Can

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash Can. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Burnt Bronze

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Burnt Bronze. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a... ... more

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Tactical Grape

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Tactical Grape. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a... ... more

Sons of Liberty Gun Works Threaded Barrel 5.56mm 11.5in Combat V2 Profile Carbine Gas 1/2x28 1-7 Twist QPQ Black 11.5COMBATV2-556

Sons of Liberty Gun Works Threaded Barrel 5.56mm 11.5in Combat V2 Profile Carbine Gas 1/2x28 1-7 Twist QPQ Black 11.5COMBATV2-556. With the significantly increased chamber support our V2 contour barrels are better suited for modern configurations where... ... more

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Flat Dark Earth

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Flat Dark Earth. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a... ... more

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 11.5in Carbine Length 1-7 Twist 10.3in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 11.5in Carbine Length 1-7 Twist 10.3in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD. The R-ONE line of handguards are designed with size and weight in mind providing the perfect addition to... ... more

Geissele Super Duty Stripped Upper Receiver 5.56mm 10.3in Barrel Carbine Length 1-7 Twist Sand 10.3in 08-244S

Geissele Super Duty Stripped Upper Receiver 5.56mm 10.3in Barrel Carbine Length 1-7 Twist Sand 10.3in 08-244S. At the heart of this stripped upper is a Super Duty upper receiver that mates to a 9.3" MK16 Super Modular rail via a center aligning tab... ... more

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Black

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Black. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a... ... more

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Tactical Grape GD105E9GFR556GRP

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Tactical Grape GD105E9GFR556GRP. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum... ... more

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Burnt Bronze GD105E9GFR556BB

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Burnt Bronze GD105E9GFR556BB. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a... ... more

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard Black Anodized

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard Black Anodized. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate... ... more

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid-Length Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid-Length Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized. Specifications for Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash... ... more

Stag Arms 15 Tactical Elite 5.56mm Upper Receiver 16in Right Hand Hanson Barrel Profile Mid-Length 1-7 Twist 1/2-28 Thread VG6 Gamma SL FDE

Stag Arms 15 Tactical Elite 5.56mm Upper Receiver 16in Right Hand Hanson Barrel Profile Mid-Length 1-7 Twist 1/2-28 Thread VG6 Gamma SL FDE. 56mm Upper Receiver. Formulated using some of the most strong and long lasting components around these AR15... ... more

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can OD Green

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can OD Green. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for... ... more

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard FDE Cerakote

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard FDE Cerakote. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate... ... more

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tactical Grape

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tactical Grape. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6... ... more

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tungsten Gray

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tungsten Gray. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum... ... more