Tiger Rock AR-15 Complete Upper Receiver 5.56mm 24in 16in Barrel M4 Carbine 1x8 Twist 1/2x28 Thread 10in Quad Rail Handguard Brake Nitride Anodized

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16" Carbine 12" Hg B

Why buy a complete rifle, only to discard half (or more) of its parts as you customize it? Money down the drain! Our Aero Precision AR-15 Upper Bundles contain the three core components: receiver, barrel, and an extended M-LOK handguard. You purchase... ... more

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

Luth-Ar Ar-15 14.5" Socom Upper Receiver 1-7

Starts with Luth-AR's 14.5″ M4 SOCOM profile barrel with F Marked Front Sight Base, 5.56mm, made from 4150 CMV steel with a 1-7″ twist mated to the A3 Flattop receiver which includes their bolt carrier, charging handle, forward assist and ejection port... ... more

Tiger Rock AR-15 Rifle Build Kit BCG LPK and Stock Kit 5.56mm 17in 16in Barrel M4 A2/Gov Carbine 1x8 1/2x28 10in Quad Rail Handguard Brake Nitride

Tiger Rock AR-15 Rifle Build Kit BCG LPK and Stock Kit 5.56mm 17in 16in Barrel M4 A2/Gov Carbine 1x8 1/2x28 10in Quad Rail Handguard Brake Nitride. Lower receiver is not included. Specifications for Tiger Rock 5.56mm AR-15 Rifle Build Kit:... ... 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

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 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard w/VG6 Precision

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 145in Mid-Length Barrel 1-7 Twist 1/2x28 Thread ATLAS R-ONE Handguard w/VG6 Precision. The R-ONE handguards are designed with size and weight in mind while still providing plenty of... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Ce Rail USA Edition AR-15 24.75in 16in Barrel Carbine 1-8 Twist 1/2x28 Thread M-LOK Stainless Steel Bird

XTS Complete Upper Receiver w/o BCG w/ 12in Ce Rail USA Edition AR-15 24.75in 16in Barrel Carbine 1-8 Twist 1/2x28 Thread M-LOK Stainless Steel Bird. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These... ... more

Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized

Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight 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... ... more

Tiger Rock AR-15 Barrel Rifle Modular Kit .223 Wylde 24in 18in Barrel M4 A2/Government Mid 1x7 Twist 1/2x28 Thread 15in M-Lok Handguard Brake

Tiger Rock AR-15 Barrel Rifle Modular Kit .223 Wylde 24in 18in Barrel M4 A2/Government Mid 1x7 Twist 1/2x28 Thread 15in M-Lok Handguard Brake. This is a great kit for those looking to build their own AR. All the parts included in the basic upper... ... 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

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Blue

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Blue. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These XTS... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Silver

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Silver. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These XTS... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish OD Green

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish OD Green. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These XTS... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... 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

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish OD

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish OD. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

LaRue Tactical Stealth A3Threaded Barrel AR Platform AR-15 16in 5.56mm Mid Length 1/8 Twist 1/2x28 Thread Black LT15-6S-M-223-8-16-Y-1M-A3

LaRue Tactical Stealth A3Threaded Barrel AR Platform AR-15 16in 5.56mm Mid Length 1/8 Twist 1/2x28 Thread Black LT15-6S-M-223-8-16-Y-1M-A3. Stealth Uppers are considered by many to be the finest improvement that can be made to a stock AR15 Rifle.... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Bronze

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Bronze. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These XTS... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Red XTS-CU-16RD

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Red XTS-CU-16RD. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish XTS-CU-16BK

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish XTS-CU-16BK. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These XTS... ... more

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish. 5in AR15 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and... ... more

Stag Arms AR-15 Tactical Upper Receiver .300 AAC Blackout 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Right Hand VG6 Delta FDE STAG15103002

Stag Arms AR-15 Tactical Upper Receiver .300 AAC Blackout 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Right Hand VG6 Delta FDE STAG15103002. The handguard provides an uninterrupted picatinny rail along the top which allows room for sights optics and... ... 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 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

Angstadt Arms AR-15 Complete Upper Assembly with Flash Hider 9mm Luger 6 inch Barrel M4 Profile .750 inch 1-10 Twist 1/2x28 Chromoly Black AAUT109006

Angstadt Arms AR-15 Complete Upper Assembly with Flash Hider 9mm Luger 6 inch Barrel M4 Profile .750 inch 1-10 Twist 1/2x28 Chromoly Black AAUT109006. Ready to run with any 9MM AR-15 dedicated lower receiver. Specifications for Angstadt Arms AR-15... ... 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

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 19.5in 10.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 19.5in 10.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride. 56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. With an... ... more

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 16.5in 7.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Finish

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 16.5in 7.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Finish. 5in 5.56 upper comes FULLY ASSEMBLED with a 5.56 NATO barrel capable of shooting both .223 and 5.56. These... ... more

Angstadt Arms AR-15 Complete Upper Assembly with Flash Hider 9mm Luger 10.5 inch Barrel M4 Profile 1-10 Twist 1/2x28 Chromoly Black AAUT109105

Angstadt Arms AR-15 Complete Upper Assembly with Flash Hider 9mm Luger 10.5 inch Barrel M4 Profile 1-10 Twist 1/2x28 Chromoly Black AAUT109105. Ready to run with any 9MM AR-15 dedicated lower receiver. Specifications for Angstadt Arms AR-15 Complete... ... more

Sharps Bros. 16in AR15/M4 Complete Upper Receiver 5.56/.223 Cal 15in Handguard Mid Length 1-7 Twist Rate 1/2x28 TPI Black Nitride SBBU01

Sharps Bros. 16in AR15/M4 Complete Upper Receiver 5.56/.223 Cal 15in Handguard Mid Length 1-7 Twist Rate 1/2x28 TPI Black Nitride SBBU01. Specifications for Sharps Bros. 16in AR15/M4 5.56/.223 Complete Upper Receiver: Manufacturer: Sharps Bros.... ... more

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 300 BO 17.5in 8in Barrel 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Finish XTS-CU8300CE

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 300 BO 17.5in 8in Barrel 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Finish XTS-CU8300CE. 5in AR15 300 Blackout upper comes FULLY ASSEMBLED With an Anchor Harvey Upper and an XTS Hand Guard this... ... more

Radian Weapons Model 1 Complete Upper Receiver .223 Wylde 10.5 in Barrel Custom Carbine Length 1-8 Twist 1/2x28 Thread M-LOK Deadair Flash Hider FDE

Radian Weapons Model 1 Complete Upper Receiver .223 Wylde 10.5 in Barrel Custom Carbine Length 1-8 Twist 1/2x28 Thread M-LOK Deadair Flash Hider FDE. Beyond quality and aesthetics the Model 1 features fully ambidextrous controls adding much-needed... ... more