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BARRELED UPPER RECEIVERS UPPER RECEIVERS CHARGING HANDLES
Most items in this category will ship directly from CMMG. We've worked out special pricing with CMMG on their complete uppers, and are able to extend the savings to you.

The products that ship from CMMG will be clearly marked on the product page and you will receive another reminder when the product is added to the cart. Only these specific items ship from CMMG. Everything else is stocked right here in our warehouse and ships fast. Items that ship from CMMG may take 3-6 weeks to process

NARROW DOWN YOUR RESULTS BY CHOOSING A SUBCATEGORY
HARDWARE & SMALL PARTS GAS SYSTEM PARTS
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AR15 Upper Receiver Completion Kit Aero Upper Receiver Completion Kit
Our Price: $18.00
SALE PRICE: $16.99
IN STOCK
(38)
M4 Flat Top Blemished Nickel Teflon AR-15 Upper Receiver Nickel Teflon Upper Receiver (M4 Flat Top) - Complete ***BLEM***
Our Price: $179.00
SALE PRICE: $99.99
FREE SHIPPING APPLIES TO ENTIRE CART
IN STOCK
(152)
Black Nitride Mil Spec Gas Tube (Rifle Length) Black Nitride Mil Spec Gas Tube (Rifle Length)
MSRP $15.00
SALE PRICE: $13.95
IN STOCK
(5)
AR15/M16 Firing Pin Retaining Pin Firing Pin Retaining Pin
Our Price: $1.00
IN STOCK
(7)
Phosphate Gas Block (.625) Low Profile - .625 Phosphate Gas Block (.625) Low Profile - .625
MSRP $29.95
SALE PRICE: $15.00
IN STOCK
(30)
Black Nitride Gas Block Low Profile - .936" Phosphate Gas Block Low Profile - .936"
MSRP $29.95
SALE PRICE: $15.00
IN STOCK
(2)
Forward Assist Assembly Kit Forward Assist Assembly Kit
MSRP $12.00
SALE PRICE: $10.99
IN STOCK
(4)
Black Nitride Gas Block Low Profile - .875" Phosphate Gas Block Low Profile - .875"
MSRP $29.95
SALE PRICE: $15.00
IN STOCK
(1)
SLR Rifleworks .750 Sentry 7 Set Screw Adjustable Gas Block SLR Rifleworks Sentry 7 Set Screw Adjustable Gas Block - .750
MSRP $119.99
SALE PRICE: $113.99
FREE GAS TUBE + ADDITIONAL DISCOUNT
IN STOCK
(27)
Black Nitride Mil Spec Gas Tube (Pistol) Black Nitride Mil Spec Gas Tube (Pistol)
MSRP $15.00
SALE PRICE: $13.95
IN STOCK
(17)
Strike Forward Assist - Black Strike Forward Assist - Black
MSRP $18.95
SALE PRICE: $17.95
IN STOCK
(1)
SLR Rifleworks Sentry 6 Clamp on Adjustable Gas Block - .625 SLR Rifleworks Sentry 6 Clamp on Adjustable Gas Block - .625
MSRP $119.99
SALE PRICE: $113.99
FREE GAS TUBE + ADDITIONAL DISCOUNT
IN STOCK
(4)
Black Nitride Mil Spec Gas Tube (Carbine) Black Nitride Mil Spec Gas Tube (Carbine)
MSRP $15.00
SALE PRICE: $13.95
IN STOCK
(19)
Black Nitride Gas Block Low Profile - .750 Gas Block Low Profile - .750
MSRP $29.95
SALE PRICE: $15.00
IN STOCK
(39)
SLR Rifleworks Sentry 7 Clamp Premium Adjustable Gas Block - .750 SLR Rifleworks Sentry 7 Clamp On Adjustable Gas Block - .750
MSRP $119.99
SALE PRICE: $113.99
FREE GAS TUBE + ADDITIONAL DISCOUNT
IN STOCK
(16)
Strike Forward Assist - Red Strike Forward Assist - Red
MSRP $18.95
SALE PRICE: $17.95
IN STOCK
POF Rattler Ambi Charging Handle - AR15 POF Rattler Ambi Charging Handle - AR15
MSRP $75.00
SALE PRICE: $65.00
IN STOCK
Spikes Tactical AR15 Billet Upper Receiver- Gen II Spike's Tactical Billet Upper- Gen II (Mil Spec Barrel Nut)
MSRP $270.00
SALE PRICE: $229.99
IN STOCK
(22)
2A Armament Lightweight Steel Gas Block - .625" 2A Armament Lightweight Steel Gas Block - .625"
MSRP $59.99
SALE PRICE: $56.00
FREE SHIPPING APPLIES TO ENTIRE CART
IN STOCK
(1)
CMMG Extended MK4 Ambi Charging Handle CMMG Extended MK4 Ambi Charging Handle
MSRP $79.95
SALE PRICE: $69.95
IN STOCK
SLR Rifleworks Sentry 6 Set Screw Adjustable Gas Block - .625 SLR Rifleworks Sentry 6 Set Screw Adjustable Gas Block - .625
MSRP $119.99
SALE PRICE: $113.99
FREE GAS TUBE + ADDITIONAL DISCOUNT
IN STOCK
(7)
   
 

AR15 Upper Receiver Replacement Parts

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.