Diamondhead USA Low Profile Gas Block - .750" - Set Screw Style

Manufactured by Diamondhead USA
SKU: 3131
MPN: 3131
Manufactured by Diamondhead USA
8 Reviews

In Stock

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Diamondhead USA is a leading design innovator, manufacturer, and distributor of top quality accessories for the tactical weapons industry.

The Diamondhead Low-Profile Gas Block installs quickly with a dual set screw design. It is precision bored to .750” diameter and has a parkerized finish.


  • Parkerized finish
  • (2) set-screws
  • .750” gas seat diameter
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BrandDiamondhead USA
FinishManganese Phosphate
Manufacturer.Diamondhead USA
Size.750 in
TypeLow Profile

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

8 reviews

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Great fit and finish


I've used this before and at this price point I'll use it again.

Well built


well built and very low profile to fit under the V-RS "T" hand guard

Looks good.


Pretty solid, looks good. As a lot of AR components I've received in the mail, it had a few little finish issues and blemishes… Nothing a little bluing couldn't fix.

Good gas block


Does what it's supposed to under a BCM Alpha 13" handguard. Finish was solid.

Low-pro free float is the way to go.

by -

I didn't purchase this at $33.25 (I got it on sale) but I'm very happy with the part and it does the job exactly as advertised. The screws for install have small teeth so they bite into the metal inside the dimples you'll be drilling in your barrel. It's a very easy install that can be done by anyone who has basic knowledge of handheld tools. Multiple instructional videos on the internet can walk you through the process easily.

Great product.

by -

This gas block has worked great and functions as it should. Can’t beat it for the price.

all gassed up an ready to go !!!

by -

fit and finish are amaaaaaazing...haha. i would definitely recommend this guy to anyone... will be buying again for sure.


by -

I got this while it's onsale...I am cheap, no doubt. I am a noob on this new hobby and my view of this product could be different than any pros out there. This fit well on my free flow handguard of 16" AR15and it does its job which recycle and pew pew.
<br> Primary Arms customer service + shippin and handling are excellent....Thank you.