.223/5.56 AR-15 Build Kits and Assemblies
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AT3™
AT3™ FF-ML 11.5″ Complete AR 15 Pistol Upper – .223/5.56 11.5″ Ballistic Advantage Barrel...
Uncompromising quality meets unbeatable value - The AT3 11.5" Pistol Upper with SPEAR M-LOK Handguard AT3 Complete Upper assemblies are Built for Accuracy and Reliability - Guaranteed. Quality Where it...8 Options -
TacFire RK556 Unassembled AR-15 Complete Rifle Kit
Unassembled Rifle Kit with Free-Float Handguard Build a complete AR-15 that can do it all at an excellent price point with Tacfire. This kit ships to your door unassembled, with... -
AT3™
AT3™ FF-ML Complete Rifle AR 15 Upper – .223/5.56 16″ Faxon Firearms Barrel –...
Uncompromising quality meets unbeatable value. The AT3 Tactical FF-ML Complete AR-15 Upper, now with a lightweight Faxon Gunner barrel! AT3 Complete Upper assemblies are Built for Accuracy and Reliability -...16 Options -
Radical Firearms 16″ 5.56 NATO Complete AR 15 Upper Receiver with M-LOK Handguard
Complete Budget-Friendly Upper Receiver for 5.56 NATO AR Builds The Radical Firearms 16" 5.56 NATO Complete Upper Receiver is a great way to start your .223/5.56 NATO AR build. It... -
AT3™
AT3™ FF-ML 10.5 Inch Complete AR 15 Pistol Upper – 10.5 Inch Faxon .223/5.56...
Uncompromising quality meets unbeatable value - The AT3 10.5" Pistol Upper with SPEAR M-LOK Handguard AT3 Complete Upper assemblies are Built for Accuracy and Reliability - Guaranteed. Quality Where it...24 Options -
Midwest Industries 16 Inch Complete AR 15 Upper with 14 Inch Combat Rail
Lightweight Upper with Combat-Ready M-LOK Handguard It's no secret that Midwest Industries makes quality components for just about every piece of the AR-15. Compared to your standard upper group, this... -
Midwest Industries 16 Inch Complete AR 15 Upper with 15 Inch Combat Rail
Lightweight Upper with Combat-Ready M-LOK Handguard It's no secret that Midwest Industries makes quality components for just about every piece of the AR-15. Compared to your standard upper group, this... -
AT3™
AT3™ FF-ML 10.5″ Complete AR 15 Pistol Upper – Choose Your Own 10.5 inch...
Uncompromising quality meets unbeatable value - The AT3 10.5" Pistol Upper with SPEAR M-LOK Handguard AT3 Complete Upper assemblies are Built for Accuracy and Reliability - Guaranteed. Quality Where it...16 Options -
AT3™
AT3™ FF-ML 11.5 Inch Complete AR 15 Pistol Upper – .223/5.56 11.5 Inch Faxon...
AT3's Best Pistol Upper - Featuring an Adjustable Midlength Gas System on an 11.5" Faxon Firearms Barrel AT3 Complete Upper assemblies are Built for Accuracy and Reliability - Guaranteed. Quality...8 Options -
AT3™
AT3™ Complete Rifle Kit – Magpul Lower Build Kit – .223/5.56 16 Inch Ballistic...
Instant Rifle. Just Add Lower. Don't settle for the budget-line rifle kits you're used to seeing. Get a complete assembled upper from AT3 Tactical, with a lower build kit including...16 Options -
AT3™
AT3™ FF-ML Complete Match Grade AR 15 Upper – .223 Wylde 16 Inch Faxon...
If you're serious about accuracy, don't settle for less. Get the best value for match-grade shooting with AT3's first .223 Wylde Upper Receiver. AT3 Complete Upper assemblies are Built for...24 Options -
Midwest Industries 10.5 Inch Complete AR 15 Upper with 9.25 Inch Combat Rail
Combat-Ready AR-15 Pistol Upper with M-LOK Handguard If you're planning to run an AR Pistol, you'll be hard-pressed to find better options for a complete upper assembly. Midwest Industries has...Only$554.95
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