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Questions & Answers
Does this item include the gas tube roll pin? Expert Answer

Yes. The CMC Triggers AR-15 Low Profile .750 Gas Block includes the gas tube roll pin and is fully compatible with Mil-spec gas tubes and hardware.

by Ethan, Gear Expert, March 30, 2022
What is the spacing for pre drilling with a dimpling jig? I don't understand why they wouldn't have that in the specs. .400, .425, .450, .470, .500 ? Expert Answer

Unfortunately CMC has not provided that information even on their own site. We recommend contacting them directly, they should be able to provide you with that information. You can reach them here: https://www.cmctriggers.com/contacts/

by Ethan C., Gear Expert, November 22, 2019
Customer Reviews
Helpful Negative Review cmc gas block by Matt Blaisdell, Verified Owner, August 2, 2022
i have 2 of these gas block and there tolerance where the gas tube goes in to the gas block is horrible. these gas blocks get a lot of blow by causing shot strokes. CMC needs to tolerance check the gas block.
2/2 found this helpful
Most Recent Reviews Best bang for your buck by AJ, Verified Owner, March 19, 2025
Always been a fan of their triggers. The gas block is now added to that list. Simple, sleek, and does the job!
Most Recent Reviews CMC Gas block by Gas block, Verified Owner, March 18, 2025
Works as intended. Comes with necessary parts. Install was as intended. Quality product
Most Recent Reviews .750 Gas Block by Huntersssss, Verified Owner, February 26, 2025
Once order processed shipped in only a couple days very happy with this company
Most Recent Reviews SBR gas block by LG, Verified Owner, March 1, 2023
I used this to replace a faulty adjustable block on a 10.3 colt mk18. No issues at all when installed. A bit gassy with the silencer attached but has no issues with cycling. Added a h2 buffer and it’s perfect.
Most Recent Reviews Loose tolerances but super nice build quality. by flashgross, Verified Owner, August 20, 2024
As I stated in the title, this gas block's fit and finish is great. It's made of 17-4PH steel which is an astoundingly strong steel, one of the strongest probably on the market. It's a much better steel than say the BCM gas block... but the BCM is a ...
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Read All 11 Reviews

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Color: Black Gas Block Journal Size-Diameter: .750 inSize: 1.35x1in Gun Model: AR-15 Weight: 0.66 oz

Code: 1TA-RGB-ARGB-81611

MPN: 81611

UPC: 859464006291

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$30.59

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Product Info for CMC Triggers AR-15 Low Profile .750 Gas Block

Unique, all-steel gas blocks expand the versatility of your rifle by providing a variety of accessory rail and hand guard mounting options. Especially helpful in customizing short-barreled tactical rifles. Designed Specifically for AR15 s with a barrel .750" O.D. at gas port.image

Low Profile version is a low and narrow, one-piece block designed to fit inside most free-float hand guards; allows use of rifle length forearms on carbine length barrels for a clean, streamlined look and added gripping surface. Securely attaches to the barrel with included dual hex head set-screws.

Works in conjunction with all CMC Triggers AR-15 Nitride Gas Tubes or standard Mil Spec gas tubes and hardware.

WARNING: California`s Proposition 65

Specifications for CMC Triggers AR-15 Low Profile .750 Gas Block:

Manufacturer: CMC Triggers
Color: Black
Fabric/Material: 17-4PH Stainless Steel
Gas Block Journal Size-Diameter: .750 in
Size: 1.35x1in
Gun Model: AR-15
Weight: 0.66 oz

Features of CMC Triggers AR-15 Low Profile .750 Gas Block:

  • Machined from 17-4PH Stainless Steel
  • Weight: 0.66 oz
  • Dimensions: 1.35(ht) 1(ln)
  • made in specialized factories

Package Contents:

  • CMC Triggers AR-15 Low Profile .750 Gas Block

CMC Triggers AR-15 Low Profile .750 Gas Block Orderable Models

List of Orderable Models

CMC Triggers AR-15 Low Profile Gas Block, .750, Nitride Finish, Black, 81611 , MPN: 81611 , UPC: 859464006291 , Code: 1TA-RGB-ARGB-81611
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