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Radical Firearms 16" 6.8 SPC II 1:11 Mid-Length HBAR Complete Upper - 15" KeyMod FHR Rail

Manufactured by Radical Firearms
3 Reviews


In Stock

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In Stock


Barrel Length16
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRadical Firearms
Caliber Gauge6.8 SPC II
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in Radical KeyMod FHR Rail
Muzzle DeviceA2 Flash Hider
Twist Rate1:11

Ratings & Reviews

3 reviews

  • 4 stars
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  • 3 stars
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  • 1 star
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Buyer Beware

by -

I’ve gone through two of these uppers now and I’m calling it quits. The first one was horrible with failure to eject/extract malfunctions due to what I believe and researched as being a gas issue. Most likely undergassed. Exchanged it for a new one (Primary Arms’ customer service is top notch btw) and while it is smoother and ran better than the old, I still had 4 of the same issues in ~50 rounds I shot through it. I’m cutting my losses. Do your research on Radical Firearms’ QC and you’ll find it wasn’t good a couple years ago and it still isn’t it appears. Wish I would’ve before I bought it. You may get a perfectly functional one or a lemon.

So far so good. After 200 rounds no problems or warnings

by -

The key-mod are placed in reverse/backwards. I believe this was done to aid in attachment not being able to be knocked off. There are no sharp edges, but there can be a little bite to the hand guard. The picatinny rail has the usual sharp edges. There are key-mod holes along the entire sides and bottom of hand guards, less the picatinny sections.

<br>The gas system appears to be sturdy and completely serviceable. After 200 rounds, no short stroking, no failures to feed. I see very small amounts of carbon deposits, no more than what I have seen with other quality gas systems.

<br> I would say it is over gassed (as most ARs) by the brass ejection pattern. Using S&B and AE eagle 110gr FMJ, I am seeing 2 o’clock ejections.

<br>The price has come down, I hope this is due to usual reasons. I cannot find reviews for this upper anywhere. I hope this one helps.

<br>I stripped a barrel screw by using the wrong allen wrench. E-mailed CS and within 24 hours they mailed out replacement screws free of charge!

Bargain price for quality upper Part 1 of 2

by -

If this barrel is made up of and surface treated as stated in the description, then this upper is a STEAL at either price I list above. 4150 steel, MELONITE treated, 1:11 twist, mid-length gas system, free float barrel...are you kidding? These are ideal specs. Melonite/salt nitride is without question has better corrosion control, does not add material to the barrel, only treats existing materials, and is very hard.

<br>Better than chrome (do not know why higher end uppers till use chrome).

<br>The hand guards hybrid has picatinny where you need: full rail at top, 3" sections placed where light and sling can be attached (end of guard, both sides). There is a 5" picatinny section from muzzle end, bottom of the hand guard.