#upper receiver

My long overdue look at the Criterion Barrels 12.5" Barreled Upper Receiver...

While I’ve had and shot a lot of different ARs, this 12.5″ barreled upper receiver by Criterion Barrels was special. Not only was it probably put together with the most attention to detail of any rifle I’ve owned, but there is a cool back story.

While it started its life as a old school Mega Arms billet upper receiver and…

$69.99  ANDERSON MANUFACTURING M4 A3 UPPER RECEIVER ASSEMBLY

American Made from Anderson Manufacturing featuring forged 7075-T6 aluminum to Mil. Specs, features extended M4 feed ramps. Plated per MIL-A-8625. Includes forward assist and dust cover assembly.

SPECIFICATIONS:

These uppers were designed and are MACHINED 100% in the USA

Made from 7075-T6 aluminum (Forged)

M4 Style feed ramps

Inside coated with dry film lube

Accepts Standard upper receiver parts

Accepts Mil-Spec Lower receivers

Fit and function with your standard lower receiver

Hardcoat Anodized matte black to Military Specifications or better

$32.99  M4 / AR-15 UPPER RECEIVER PARTS KIT

The easiest way to build rifles out of your receivers. This complete kit is much lower in total cost than buying the parts one at a time. Kit includes: forward assist assembly, ejection port cover assembly, flash hider crush washer, peel washer, ejection hinge pin snap ring, forward assist rear base spring pin, forward assist spring, ejection port cover pin and ejection port cover spring.

Belt-fed

Belt.

Forged from T6 7075 Aluminum, the XTS Stripped Upper Receiver is finished in Matt Black Anodized coating. Fitting standard AR Mil-Spec Lowers, the XTS Stripped Upper is capable of handling calibers .223/5.56, 300 Blackout, 7.62×39 and Grendle.

Includes:

Stripped Upper Receiver

Ejection Port Cover

Ejection Port Cover Rod

Ejection Port Cover Spring

Forward Assist

Forward Assist Spring

$386.99  Del-Ton Upper Receiver AR-15 M4 5.56 16 Flattop Pre

Barrel: Chrome Moly Vanadium M4 Feed Ramps 16 Length 1x9 Twist A2 Flash Hider Manganese Phosphated Phosphated Under Front Sight Base Taper Pins On A2 Front Sight Base Threaded Muzzle M4 Profile Chamber: 5.56 X 45 Mm Bolt And Carrier: Phosphated 8620 Steel Carrier Assembly Carpenter 158 Bolt Hpt/mpi Tested Heat Treated And Plated Mil-spec Chrome Lined Carrier Interior Carrier Key Chrome Lined Attached With Grade 8 Screws Properly Staked & Sealed Gas Key Handguards: Carbine Length Aluminum Delta Ring Single Heat Shield Upper Receiver: Forged 7075 T6 Aluminum A3 Flat Top With M4 Feed Ramps Hard Coat Anodized Mil-spec Ejection Port Cover And Round Forward Assist Right Hand Ejection Bore's Surface Is Coated With Dry Film Lube Over The Anodized Surface