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  1. Home
  2. Upper Receivers & Parts

AR15 Upper Receiver Replacement Parts

Complete Uppers
Barreled Uppers
Upper Build Kit
UPPER RECEIVERS
CHARGING HANDLES
HARDWARE, DOORS & SMALL PARTS
GAS SYSTEM PARTS

Upper Receivers & Parts

  • Complete Uppers
  • Barreled Uppers
  • Upper Build Kit
  • UPPER RECEIVERS
  • CHARGING HANDLES
  • HARDWARE, DOORS & SMALL PARTS
  • GAS SYSTEM PARTS

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  • Aero Precision M4E1 Upper Receiver, 18" .223 Wylde Rifle Barrel, EM-15 HG Gen 2 | Without BCG & CH

    Aero Precision M4E1 Upper Receiver, 18" .223 Wylde Rifle Barrel, EM-15 HG Gen 2 | Without BCG & CH

    MSRP:
    MSRP: $559.99
    Click for Price
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  • Aero Precision M4E1 Upper Receiver, 18" .223 Wylde Fluted Barrel, ATLAS R-ONE HG | Without BCG & CH

    Aero Precision M4E1 Upper Receiver, 18" .223 Wylde Fluted Barrel, ATLAS R-ONE HG | Without BCG & CH

    MSRP:
    MSRP: $584.99
    Click for Price
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  • Aero Precision M4E1 Upper Receiver, 18" .223 Wylde SS Rifle Length Barrel, ATLAS R-ONE 15" M-LOK HG | Without BCG & CH

    Aero Precision M4E1 Upper Receiver, 18" .223 Wylde SS Rifle Length Barrel, ATLAS R-ONE 15" M-LOK HG | Without BCG & CH

    MSRP:
    MSRP: $549.95
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  • Aero Precision M4E1 Upper Receiver,  16" .223 Wylde Mid-Length Barrel, 15" M-LOK ATLAS S-ONE | Without BCG & CH

    Aero Precision M4E1 Upper Receiver, 16" .223 Wylde Mid-Length Barrel, 15" M-LOK ATLAS S-ONE | Without BCG & CH

    MSRP: $534.99
    SALE PRICE: $525.00
    Click for Price
    Notify Me

We carry everything you need to upgrade your AR15 upper receiver with the best replacement parts from top brands including Spike’s Tactical, Rock River Arms, BCM and more. Our selection of mil-spec upper receiver parts and hardware includes assembly and installation kits, as well as custom ejection port dust covers. We have the most versatile ambidextrous charging handles, gas system parts including gas blocks and tubes, complete upper receivers and everything else you may need to upgrade or repair your AR15 upper receiver assembly. All of our replacement AR15 upper receiver parts are made from the most durable materials and are guaranteed to fit with no additional machining.

 

All of our AR15 upper receiver parts and AR15 hardware are made from steel, aluminum and other durable materials. Buy now to enjoy our everyday low prices and fast shipping on all orders or contact us for more information and our experts will help you find everything you need. We also offer a Cerakoting service for several of our popular upper receivers.

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RTB is now offering our own line of .22LR parts and accessories. We use only the most trusted contractors to precision manufacture our .22LR barrels, bolt and magazines. All Right to Bear rimfire products are compatible with CMMG 22 conversion kits and other rimfire components. The RTBA brand brings you the only lightweight .22LR pencil barrel on the market at an affordable price! Visit our 22/rimfire category today and take advantage of our lightning fast shipping!

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