Radical Firearms 10.5" 5.56 NATO 1:7 Carbine Length M4 Barreled Upper - 10" Primary Arms Exclusive M-LOK Rail
Out of Stock
This barreled upper does not include a bolt carrier group or charging handle.
The Radical Firearms 10.5” 5.56 NATO M4 Barreled Upper is a law enforcement grade, drop-in solution for your next AR build. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. Arrives at your door with the hard work done. Complete this build with your favorite lower receiver, bolt carrier group, charging handle, and sights, then head for the range!
Includes the Radical Firearms/Primary Arms Exclusive M-LOK Handguard. Crafted from 6063-T6 aluminum and hardcoat anodized a deep black, this tough, durable rail offer a slim, modular profile. Large cooling holes along the rail reduce weight and aid in rapid cooling. Take advantage of M-LOK positions along the 3, 6, and 9 o’clock of the rail for all your favorite gear. An uninterrupted M1913 Picatinny top rail offers space to mount optics, sights, and other accessories with ease.
- 10.5" 41V50 chrome moly vanadium steel M4 contour barrel with Melonite finish
- Chambered in 5.56 NATO with 1:7 twist rate
- 1/2x28 A2 flash hider
- 10" free float Radical Firearms/ Primary Arms Exclusive M-LOK Rail
- Made in the U.S.A. in Stafford, Texas!
Ratings & Reviews
Two different uppers with the same problem.
Had to send the first one I got back for an exchange due to the upper receiver not allowing magazines to fully seat in the lower (the problem followed when trying this upperon different lowers). Got my replacement and it had the same issue as the first with the addition of the pin holes being ever so slightly off. I wound up picking up an Anderson stripped upper from a local shop and swapped the barrel, forward assist and rail onto it. I think Radical needs to look at their QC process a bit closer.
by Travis -
Extremely fast shipping. Nice fit and finish and runs out great. Hella good buy.
Fit and finish
by Andrew -
I just switched from the 10.5" 300 blk out with the moe rail to this one. The fit and finish of the primary arms exclusive m-lok rail is much, much nicer than the moe version. It really streamlines the profile. Will report back after shooting it
Outstanding Service, Good Product
by Mark - From Orlando,FL -
What a deal. Got this in the mail today and my initial inspection and reaction were excellent. Well made, solid, well packaged, free of dents, blemishes, and imperfections. For the price you can't ask for more. This is an excellent buy for the financially responsible gun enthusiasts. I'm sure it will perform well at the range.
<br>Where Primary Arms gained 5 Stars (I'd give them 10 if I could) was in customer service. I ordered this Sept 12th, they processed, packaged, and shipped it the same day. It was at my front door Sept 14th despite them being in Houston (Hurricane Harvey) and me being in Orlando (Hurricane Irma). THAT speaks volumes of a company. Primary Arms is now my go to dealer for all things guns. You can't go wrong with this company.