PRI Gas Block With Top Picatinny Rail

Stock Status:

Out of stock

PRI Gas Block for AR15, M16, M4, M4A1, for .750 barrels. Same plane as flat top upper receiver!!
This Barrel mounted gas block has a 2 1/2" top rail same plain as the receiver. The rail is constructed of light wait hard coat aluminum. This gas block weights 2.5oz. Gas block fits over a .750 diameter barrel. Block locks into place with 2 crossbolts the same as the original PRI gas block front sight.
This gas block is compatible with the use of a milspec rear sights and the following RAIL MOUNT front sights: PRI, Troy Ind, BCM®/Troy, MI-FFR, MBUS
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit***

13 Reviews

  • 5
    Gas Block

    let me start off with damn! this thing really blew me off my feet when i first held it! things the perfect weight, no flaws and perfect gas block. havent used it yet since im still building the rifle but i have no doubt in it. Fitment was great. its stylish and it IS flush with the flat top rail on my Anderson lower and Aero Precision Upper build. only issue i had was that my Del Ton gas tube was a tight fit into the hole and the gas holes didnt quite line up after throwing the roll pin by a few 32's it looks like...but that could be the tube. either way im hoping it doesnt let me down! good product and great shipping and handling!

  • 5
    Great gas block

    This gas block rocks! No complaint here.
    It's fit a glove. Awesome product.
    I am planning to buy more for future builts.

  • 4
    Very good product

    This gas block performs as advertised. Stays in place with provided hardware. I would recommend this to anyone looking to install a gas block with rail.

  • 5
    Nice machining

    Fits very close to the barrel when slipped on. Nice, sharp machining. Tightens up nice with about 1/4-turn of the allen screws. Worth the money.