24 inch AR-15 NR Side Charging 5.56 NATO Stainless Fluted BULL Barrel Upper Complete Kit - BLEM

Special Price $539.99 Regular Price $729.99
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)
BCA 24 inch 5.56 NATO Rifle Length 1/8 Twist 416R Stainless Fluted Heavy Bull Barrel (Blem)
Low profile STEEL gas block
Stainless Steel Rifle length gas tube
Guntec USA 16.5 inch Sharksmouth Keymod Slim Profile Free Float Rail
Target Crown Muzzle (Unthreaded)
PSA Full Auto Nitride BCG
Unbranded AR ELG Lower Parts Kit
Rogers Super Stock Kit
Optional: Upgrade to an Azimuth Technology Nickel Boron BCG

All parts are MADE IN THE USA.

This is a Non Reciprocating Side Charging Upper - keeps the charging handle forward during operation. No need to take your finger off the trigger or lose sight picture to charge the weapon. Can mount your optic as far back are you desire without difficulty in charging weapon. 

BCA makes very high quality barrels. Made out of premium 416R stainless steel for enhanced corrosion resistance and accuracy. Fluted for better heat dissipation and weight reduction. This barrel has slight blemishes which are only cosmetic in nature. Blemishes include small scratches and uneven fluting - blemishes does not affect fit and function.

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). Comes with a PSA Nitride BCG.

*Optional* - Upgrade to an Azimuth Technology Nickel Boron BCG.

More Information
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