20 inch AR-15 NR Side Charging 223 Wylde Rifle Length Melonite BULL Barrel Upper Complete Kit

Special Price $559.99 Regular Price $749.99
In stock

Why Buy From Us?


Don't see the exact configuration you want? No problem, just let us know. Most of the time we can customize with the parts we have just to your liking.


All our uppers have a Lifetime Warranty to the original purchaser. Some conditions apply - click here for details.

Customer Service

We believe in customer service before and after the sale. We never take days or weeks to respond. Most of time if you email or leave a message, we usually respond the same day or next business day.

Turnaround Time

We usually take only 2-3 business days to build and test your upper before shipping it. We never take weeks to ship your upper. Accessories ship even faster. Check the live status update on the banner at our homepage for current wait times.


We always specify the manufacturer of the major components therefore you know what you are getting. We only use made in America components from quality manufacturers.


Gibbz Arms G4 Non Reciprocating Side Charging Upper Receiver with Gen 2 Handle (Gibbz Cam Pin included)
Guntec USA 20 inch 223 Wylde (shoots 223/5.56) Rifle Length 1/8 Twist 4150 CMV Melonite Heavy Bull Barrel 
Low profile nitride STEEL gas block
Stainless Steel Rifle length Gas tube
Guntec USA 15 inch M-LOK Slim Profile Free Float Rail (design of handguard may vary a little)
Target Crown Muzzle (unthreaded)
PSA Full Auto Nitride BCG
Unbranded AR ELG Lower Parts Kit
Rogers Super Stock Kit
*Optional*: Upgrade to an Azimuth Nickel Boron BCG

All parts are MADE IN THE USA.

Guntec makes very high quality barrels. Made out of milspec 4150 CMV and melonited for enhanced corrosion resistance and durability. 

The Guntec rail is very high quality and comparable to many other higher end rails that cost 2x or 3x as much. Barrel nut and screws are hardened steel and the mounting system is rock solid.

Gas Block diameter is 0.936 and is made out of steel (not aluminum).

Optional - Upgrade to an Azimuth Nickel Boron BCG.

More Information
FDE Color Magpul FDE Receiver & Handguard
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