Radical Firearms 10.5" 300 BLK AAC 1:8 Pistol Length Medium Taper Barrel

Manufactured by Radical Firearms
SKU: B10.5CV300HBAR-18
MPN: B10.5CV300HBAR-18
Manufactured by Radical Firearms
5 Reviews

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



NOTE: The National Firearms Act regulates the configurations of some firearms assembled with barrels under 16” long. This barrel is intended for use in AR-15 pistols or legal short-barreled rifles. Other configurations may violate Federal law.

Radical Firearms produces quality precision made barrels perfect for your next build or replacing an old barrel. Machined from 41V50 chrome moly vanadium steel and finished with a corrosion resistant salt bath nitride. This exceptionally durable barrel has a bore that is harder than traditional chrome lining without the accuracy robbing side effects.

This 10.5" barrel is perfect for your next AR pistol or registered SBR build! Chambered for the 300 AAC BLACKOUT cartridge, with a button rifled 1:8 twist rate, this barrel will yield superior performance throughout the full range of 300 BLK ammunition. The pistol length gas system allows for reliable cycling with your favorite loadings whether suppressed or with your favorite muzzle device.
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium Taper
Barrel Length10.5
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRadical Firearms
Caliber Gauge300 Blackout
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthPistol
Manufacturer.Radical Firearms
Thread Pattern5/8 X 24
Twist Rate1:8
Weight22.2 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

5 reviews


Great barrel for the money.

by -

I’m actually very impressed with this barrel for the price! Couldn’t find much of a review on its accuracy when I took a chance of buying it. I figured Primary Arms would take care of me if it wasn’t any good with their great reputation they have. But I’ll tell you with subsonic 208 to 220 grain rounds I’m getting under MOA with this at 50yards and right at MOA at 100yards. Not bad for a short barrel! Can’t say the same for 7.5 to 8” barrels I’ve tried in the past unfortunately. Best I ever would get with those were 4MOA in all sorts of different brands shooting subsonic ammo. This one is a winner though! Especially for the price of it.

Not Suppress-able


Decent quality barrel. Accurate out to 100 yds for sure. However, the description is misleading... This barrel cannot be suppressed without machinist modification. There is NO shoulder for a brake or suppressor to thread up to. A giant (.093") tool nose radius must be turned off at the base of the threads before you can mount anything reasonably square.

I like it

by -

Great Barrel. Accurate to a 100 yds like said before. Had no problem with a suppressor. Highly recommend.

Excellent barrel

by -

Finish on this barrel is top notch, youd think it was done by Glock. Fits solidly in the upper i used for this pistol build and the gas block tolerance was spot on at .7503. Accuracy at 25 yards was less than 1/2 inch. Extension is cut properly and matches up perfectly. I had zero issues with supersonics with and i dont run subs.
<br>Overall....excellent. Im betting another this week.

Can't be used as a suppressor host


I bought an upper last fall that comes with this barrel installed and after getting a can for it, I pulled the bird cage off and found that there is no shoulder for a suppressor or attachment device to index against. If you care about using a suppressor this isn't the barrel for you.