Kratos Gas Block .750″ | Kratos Design Group


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-Witness Hole to Verify Gas Port Alignment
-Machined Shelf for Pinning To Barrel
-Front of Gas Block Drilled For Gas Tube Removal
-4140 Steel
-QPQ & Heat Treated
-.750″ ID
-(3) Knurled Set Screws Included
-(2) Gas Tube Coil Pins Included
– Made in Texas
-Lifetime Warranty

(30 customer reviews)

252 in stock

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Price: $33.56

The Kratos Design Group Gas Block is CNC machined from precision ground 4140 steel bar stock. Featuring a .750 gas journal and a QPQ finish it is an incredibly robust low-profile gas block.

Several features throughout make the installation and maintenance easier.

  • Located directly opposite the gas port hole is a small witness hole that you can use to verify proper alignment of the gas block over the barrel’s gas port. Jordan B. is responsible for providing Kratos Design Group with the idea for this hole. It’s a simple and effective way to visually confirm proper alignment.
  • On the front of the gas block, there is a small hole that can be used to aid in the removal of the gas tube when needed for replacement or inspection. A 1/16″ punch can be used.
  • Our gas block also features a built-in shelf to make drilling easier when pinning the gas block to the barrel. A ⅛” drill bit and ⅛” x ⅝” steel pin is recommended.
  • Included are (3) 10-32 black oxide knurled set screws with a Rockwell hardness of C-45. We include an extra screw because they are easy to lose. Also in the package are (2) stainless steel gas tube coil pins.
    Set screw spacing: .400” Screw size: 10-32 (3/32” drive)
    Weight: 1.4oz

100% made in Texas from US-made steel.



Gas block:

4140 Precision ground US steel. Heat treated and QPQ’d. Honed to 0.750″ID. Machined in TX.

Set Screws:

10-32 black oxide alloy steel knurled cup-point set screws.  Rockwell hardness of C-45. Allen key drive size: 3/32″. Made in the USA

Gas Tube Coil Pin:

420 Stainless Steel coil pin. 550 pound breaking strength, Rockwell hardness of C46. Chamfered at both ends. Made in the USA


-Witness Hole to Verify Gas Port Alignment-Machined Shelf for Pinning To Barrel
-Front of Gas Block Drilled For Gas Tube Removal
-4140 Steel
-QPQ & Heat Treated
-.750″ ID
-(3) Knurled Set Screws Included
-(2) Gas Tube Coil Pin Included
– Made in Texas
-Lifetime Warranty

Additional information

Weight 5 oz
Dimensions 3 × 3 × 1 in

30 reviews for Kratos Gas Block .750″ | Kratos Design Group

  1. Jason (verified owner)

    Excellent design, easy installation. This is THE gas block you should be using.

  2. dbrownmc (verified owner)

    This will be the only gas block I will use going forward. Everything is well thought out on this gas block. The tampered roll pins make it easy to install a gas block using gas port witness hole makes it easy to make sure you have it all lined up. Trust me buy it and use it and you will love it.

  3. samna808 (verified owner)

    Easy to install. Fitment is good, and the low profile is a plus to fit under tight handguards.

  4. russell_cochran (verified owner)

    Bang for your buck this is the best. I love buying made in Texas products and this is no exception. Not your average gas block.

  5. msu313 (verified owner)

    Simple design, wonder why no one has done that before. Nice finish and fit. The extras are always a bonus

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