Sharps Bros Ar-15/M4 5.56mm Complete Upper - Ar-15/M4 5.56mm 16" Bbl 15" Handguard Complete Upper

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

Geissele Automatics Mk16 Urg-I Complete Upper Receivers 5.56mm - Mk16 14.5" Urgi Upper Chf Barrel, A

For more than 50 years the famed silhouette of the M16/M4 has only had one major and several minor changes. Barrel lengths and buttstocks have changed, but more or less the evolution of America's right arm has proceeded apace with each generation of... ... more

Aero Precision M4e1-T Atlas R-One Complete Upper Receivers 5.56mm - Ar-15 M4e1-T 11.5 In Atlas R-On

This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. The Aero proprietary ATLAS attachment system is a... ... 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 Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 Moly Steel Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2 Flash

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

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 Moly Steel Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2 Flash. 56 Complete Upper Receiver w/Pistol Lower Parts Kit is the perfect item for those looking to create a... ... more

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 16in 15in 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 16in 15in 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 most... ... 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

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

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

Guntec USA AR-15 5.56mm Complete Upper Kit Black GT-C-UPPER-5.5-MLK-MINI

Guntec USA AR-15 5.56mm Complete Upper Kit Black GT-C-UPPER-5.5-MLK-MINI. The goal is to distribute excellent quality at an economical value. Specifications for Guntec USA AR-15 5.56mm Complete Upper Kit: Manufacturer: Guntec USA Threads per Inch:... ... more

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

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

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 20in 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700705M48

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 20in 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700705M48. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate to... ... more

Luth-AR A3 Complete Upper Receiver Assembled 16in Lightweight Barrel 5.56mm 1-7 Twist 1/2 x 28 Thread A2 Flash Hider w/ Key MOD Palm Handguard Black

Luth-AR A3 Complete Upper Receiver Assembled 16in Lightweight Barrel 5.56mm 1-7 Twist 1/2 x 28 Thread A2 Flash Hider w/ Key MOD Palm Handguard Black. 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 Threaded 5.56mm Complete Upper Receiver 18in 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700705M8

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 18in 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized APAR700705M8. The R-ONE handguards are designed with size and weight in mind while still providing plenty of real-estate to... ... 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 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

TacFire Complete Upper Receiver AR-15 Lower Parts Kit 5.56mm 7.5in Barrel Pistol Length 7in M-LOK Handguard Anodized Black PK556-LPK

TacFire Complete Upper Receiver AR-15 Lower Parts Kit 5.56mm 7.5in Barrel Pistol Length 7in M-LOK Handguard Anodized Black PK556-LPK. Everything you need to build out your 5.56 pistol just add a lower receiver. Includes : 7.5" Barrel Low profile gas... ... more

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

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 9in 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

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 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 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 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 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard Flash Can

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 9in 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

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

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 9in 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

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Chrome Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Chrome Moly Steel 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... ... more

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Flash

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

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Flash

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

Ghost Firearms 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 Muzzle Device

Ghost Firearms 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 Muzzle Device. 56 NATO Complete Upper Receiver w/ Rifle Lower Parts Kit is packed with high-quality parts that will... ... more

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Flash

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

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

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 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

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 Tungsten Gray

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 Tungsten Gray. 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 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