Radical Firearms Low Profile Gas Block - .750" - Set Screw Style

Manufactured by Radical Firearms
Manufactured by Radical Firearms
12 Reviews

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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The Radical Firearms Low Profile Gas Block is a lightweight set screw design machined from high quality steel, sized for .750” barrels with a Melonite finish. Perfect for a new build or to replace your fixed front sight post, allowing for the installation of a free float rail.

NOTE: Gas tube roll pin not included.
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BrandRadical Firearms
Gas Seat Diameter.750
Manufacturer.Radical Firearms
TypeSet Screw
Weight1.2 Oz

Ratings & Reviews

12 reviews


Great product.


Nice finish, works great, good price. Super fast shipping as always. Thank you Primary Arms!



Gas block came without gas tube roll pin

Fit Well, No Roll Pin

by -

Fit seemed fine. Didn't end up using this block on my build, threw it in a draw for later use or a spare. I too was disappointed that it did not come with a roll pin for the gas tube. As a first time buyer/builder I was kind of expecting it to come with one. Without a roll pin, and not getting some or one with the order this gas block becomes expensive if you need to reorder roll pins and pay shipping on a $0.50 item. Luckily I needed to purchase some other items later and added on a few gas block roll pins so I have them and didn't need to spend extra on solely shipping roll pins.

Fitting concern

by -

Well, I just got this in. I do have concerns. First, let me say that I have had a good experience with Radical products. This block is finsed well and, while not the lowest price out there, would seem to be a good value. I do like that it is melonite, rather than the phosphate finish on most others. My concern is that it seems to be too loose when it slides into place at the journal. It can easily spin on the barrel. Even when the set screws are tight, I’m afraid it will lose too much gas around the block.

Concerned about fit

by -

Looks great but will spin easily on barrel. Even after tightening, I’m concerned about gas escaping.

Love this gas block

by -

I've used this gas block on 6 builds and have never had a problem with fit or gas escaping. I noticed some comments about "no roll pin" but the roll pin should come with the tube. Thanks, primary arms for having what I need at great prices.

How to info on gas block, from a Armorer.

by -

Got these when it was on sale. As an army armorer I have no problem using these gas block. They are good to go. I have built more than 2 dozen ARs and I sugest dimpling your barrel so it doesn’t spin. Also for you new builders.. roll pins comes in gas tubes. Only a few gas blocks have roll pins with them. These gas block has the sets of screws underneath, causing the gas block holes to solidly flush with the hole on your barrel. Remove the screw right under that hole on the has block. 1/8” bit, drill the gas tube hole just enough for a dent. This allows for helping allign that hole with your barrel. Easy peezy!

No roll pin.

by -

Great price, product looks great missing the roll pin...

Good Gas Block

by -

This gas block was finished well and installed easy after dimpling my barrel. It does what it was designed to do without issue. My gas tube pins have always been included with the gas tube not the block.

Good quality for cost

by -

Function fine through 350 legend. Roll pins usually come with gas tube not gas block