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
    Perfect fit

    Just what I was looking for, wanted to put on flip up sights for use with hologram sight. Fit perfect, no problems installing!!!

  • 4
    Gas block

    Have not used yet , a stock item.

  • 5
    Precise Fit

    Perfect fit and alignment , just the right amount of clearance for a snug precise fit. Quality Part.

  • 5
    DIY Build Projects

    Great quality gas block. Will use on all my builds.

  • 5
    PRI Gas Block With Top Picatinny Rail

    works very well and is rail height

  • 5
    Good stuff

    Shipped quickly. Easy to install. Works great.

  • 5
    Excellent gas block look

    If your looking for a different type of look for your gas block this is an excellent option.. Great fit.. Tightens down nicely, no wiggle. Hi quality manufacturing..

  • 5
    This is a great piece

    Just the right part I was looking for, and lines up great with a BCM upper.

  • 5
    PRI Gas Block With Top Picatinny Rail

    Outstanding product, perfect machining and easy to install and aligns well with the top rail of the handguard, it also comes with 1 shim if needed. I am having an issue with gas port alignment with the barrel/gas block port due to having the handguard cap on. I might have to remove the cap and buy a free float handguard. Fast Order confirmation and quick shipping. Great job BCM!!