.750" Arkto Adjustable Gas Block
.936" Arkto Adjustable Gas Block
Includes allen wrenches for adjustment and installation, plus Vibra-tite threadlocker.
AT3™ AR 15 Gas Tube & Carbine Gas Tube Length
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Wojtek Weaponry Arkto Adjustable Gas Block + Gas Tube + Roll Pin Combo

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Wojtek Click Adjustable AR-15 Gas Block with Gas Tube and Roll Pin

Outfit your AR-15 with an overhauled gas system, with the new Wojtek Weaponry Arkto gas block, AT3 gas tube with roll pins, and all the tools you’ll need to install. The Arkto gas block features 24 gas settings with positive clicks for adjustment, and a NiPTFE finish to resist carbon lockup. Just choose the gas block diameter and gas tube length you need, and you’ll have the perfect package to upgrade your AR-15.

No matter what package you choose, it will include the following:

  • Wojtek Arkto Gas Block
  • AT3 Stainless Steel Gas Tube
  • 2 AT3 Gas Tube Roll Pins
  • Allen Wrenches for adjustment and installation
  • 2ml vial of Vibra-tite

Will this fit under my free float handguard?

The Arkto fits great under most slim free-float handguards. The AT3 SPEAR M-LOK Rail and Quad Rail, the Aero ATLAS S-One and R-One, and many more will work great with the Arkto underneath. If you’re not sure, feel free to consult the diagrams for the gas blocks in the image gallery, or reach out to us. We’ll be happy to help you get exactly what your build needs.

How do I install this?

First, you’ll need to remove your standard gas block and tube from your rifle. Slide the Arkto onto your barrel, align the top witness hole with your barrel’s gas port. Then, secure the set screws to clamp the gas block in place. Wojtek Weaponry recommends using the included Vibra-tite on the screws, and going no further than hand tight.

After the threadlocker cures, secure your gas tube to the gas block with a roll pin. For more info on how to set up your gas block at the range, check out this guide to installing and tuning your gas block.

Wojtek Arkto Specifications

  • Fit: AR-15/AR-10 Barrels
  • Material: 1018 Steel
  • Finish: Melonite
  • Weight
    • .625″ Diameter: 1.6 oz
    • .750″ Diameter: 1.7 oz
    • .875″ Diameter: 1.9 oz
    • .936″ Diameter: 1.9oz

AT3 Gas Tube Specifications

  • Material: Stainless Steel
  • Finish: Natural
  • Total Tube Length
    • Pistol: 6 3/4″
    • Carbine: 9 3/4″
    • Mid-length: 11 3/4″
    • Rifle: 15 1/4″

Other frequently asked questions

Q: How can I tell what size of gas block I need?
A: The gas block size is based on the outside diameter of your barrel. The most common size is .75″ (this is the military standard). If you aren’t sure – use calipers to measure  the diameter of the barrel, in the area where the gas block sits. Or alternatively, you can try looking up the make and model of your rifle online for more details.
Q: How do I know what size of gas tube I need?
A: Measure the distance from the front of your upper receiver to the gas port on your barrel, and compare to the list below. (Carbine is the most common length).

Distance to port

  • Pistol = 4 inches
  • Carbine = 7 inches
  • Mid = 9 inches
  • Rifle = 12 inches

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Wojtek Weaponry Warranty

  • We will gladly accept the return of products that are defective due to defects in manufacturing and/or workmanship.
  • Fulfillment mistakes that may be made which result in the shipment of incorrect products to you will also be accepted for return.

Contact Details:

Please send an email at returns@wojtekweaponry.com

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

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