Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Glfa Gas Block For Ar .875" Dia. Barrel Low Profile Black
Currently Unavailable View Product
Compare (0)
Show
Sort by
Filter by

Well, I haven’t had the best luck with this gas block.

by Nick, from MI, United States Written on February 27, 2019
So I bought this gas block because it was a fair price and from a locally based company. After attempting to install it on a .450 bushmaster barrel, I found it was too small to fit over with any sort of ease. I was able to lap the gas block and barrel together, but have found the gun to function very poorly. I believe, between my experience of firing almost 2 boxes of .450 with every shot but one or two being a failure to cycle, as well as reading the other review, that the hole which the gas tube is installed in allows gas to leak due to the pass through design.
Would recommend: No
Was it helpful to you? Yes | No

Great Lakes .875 gas block

by Mike, Verified Owner from WY, United States Written on December 9, 2018
Hole for gas tube is to large. Let’s gas leak past tube. Installed but leaked to much to run BCG. Thought would be ok after roll pin was installed but no leaks to much. Guess you get what you pay for. This block was half the price of others.
Would recommend: No
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?