SLR Rifleworks AR Gas Block Dimple Jig

SLR Rifleworks AR Gas Block Dimple Jig

Product Code:
Calculated at Checkout
$29.99 $28.49

MPN: DJ6 / DJ7


  • 5 spacing for gas block with .400" .425" .450" .470" and .500" center to center screws
  • 5 position flats for Vice mounted drilling to keep barrel stable
  • For .750" and .625" barrels
  • Use 5/32" drill bit


  • Material: 7075-T6 Billet Aluminum
  • Finish: Anodized


  • 1x Dimpling Jig
  • 1x Hardened Centering Screw
  • 1x Custom Hardened Drill Bushing


If you want a secure gas block mount that you can count on, you want to equip a set screw mounted gas block. Unfortunately, not every manufacturer pre-dimples every barrel and we all know you’re not installing a set screw mount without those dimples. Fortunately, SLR Rifleworks offers a product that makes it easy for us to dimple our own barrels without worrying about screwing up and expensive barrel. The SLR Rifleworks AR Gas Block Dimple Jig is an easy to use gas block jig that will make short work of readying your barrel for the gas block of your choice.

.750 and .625 Diameter Gas Block Dimple Jig for AR Barrels

When you’re ready to dimple your own AR barrel, simply choose the correct size gas block dimple jig for your barrel and get to work. Choose the correct dimple spacing for your chosen gas block. This barrel dimple jig offers 5 options in one tool: .400”, .425”, .450”, .470” and .500” spacing. You’ll mount the jig to your barrel using the jig’s centering screw to secure it to the barrel’s gas port. Once the gas block jig is securely mounted to your barrel, clamp it in your bench vice and apply the hardened drill bushing to one of the guide holes in the top of the jig. Five position flats help you to secure the jig and barrel while you work and the bushing will guide your drill making dimpling a simple procedure. If you’ve got a feel for it already you may only drill each spot once. If you’re not quite that confident a light touch and alternating between pilot holes may make you more comfortable as you seek the correct depth for your dimples.

Wing Tactical Knows You Want It Done Right

And you want to do it yourself. Firearms are all about precision, good enough isn’t all it’s cracked up to be. When you need to prep your barrel for a set-screw gas block, choose an SLR Rifleworks Gas Block Dimpling Jig from Wing Tactical and give yourself an edge.

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12 Reviews

  • Makes life much easier

    Posted by David Barr on 4th Nov 2019

    Well made and takes the guess work out of lining up the gas block. Wing Tactical shipped it quickly. Will be back!!

  • Fast, easy, accurate.

    Posted by HARTFORD BOOTHE on 23rd Oct 2019

    While not rocket surgery, placing a set screw gas block accurately on an AR barrel can be done improperly. It's possible to mis-align the hole either with the gas block clocked improperly (rotated) or fore-aft (like if the shoulder is not a perfect reference for it but the installer rams the block up to it). This tool makes it super easy to drill a precisely-placed dimple on the bottom of the barrel so that the set screw has a target which, when used, means the gas port in the barrel is aligned with the gas hole in the block. I'm not a professional gunsmith, I don't work on firearms all the time, but this was still worth buying for the convenience even on only a couple of barrels.

  • Dimple jig

    Posted by Thomas Daniel on 5th Oct 2019

    Excellently engineered, did my own gasblock set screw dimpling. Results were machine shop quality and better than the Smith I had simple my last barrel.

  • SLR dimpling jig

    Posted by Christopher on 4th Oct 2019

    5 stars for me , would definitely buy another one, used it once so far, but plan to use for future builds.great service also.

  • Dimple jig

    Posted by David on 26th Sep 2019

    The jig was shipped Fast and was easy to use once you watched the "how to" video again and pay attention. Great tool, good price

  • Awesome Dimple Jig

    Posted by Steve C on 30th May 2019

    Product is just as described and easy to use. Bought a barrel a while back and it sat on my bench for the longest time before I looked it over. Well, it wasn't dimpled for the gas block and the first place I looked was Wing Tactical. Just measure the gas block, match up the desired jig and done.

  • Worked Like A Charm

    Posted by Brett Andengaard on 28th May 2019

    I bought this jig to dimple my Ballistic Advantage stainless barrel. This was my first time and I was told by a few people to have this done professionally. I bought the jig anyway and a 5/32” cobalt bit. I used my DeWalt cordless drill and did the job no problem. I was the most worried about doing this part of the build and it turned out to be one of the easier parts. The only way to do this run is to drill too deep into the barrel. As long as you go slow and keep checking to see how deep you have dance, you will be fine.

  • Easy, Worthwhile Dimpling

    Posted by Coyote on 12th Apr 2019

    This tool makes dimpling a breeze. Easy setup, with an alignment screw that’s makes sure everything is right on the money. Don’t hesitate to buy this.

  • Excellent tool!

    Posted by Mike on 13th Jan 2019

    I watched a number of videos on how to do this procedure and this tool looked like a nice one. It’s very simple to use, pretty much self explanatory and very versatile. There’s a hex bolt that you twist into your gas port. This likes up where the holes need to be drilled on the other side. Then you tighten the guide bolt into where you want to drill. The guide bolt keeps your bit drilling straight. A 5/32” bit was a perfect fit through the guide bolt. This was my first time performing this procedure and I couldn’t be happier with the results.

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