Front Sight Base F - FSB (ID .750) - Milspec for Flat Top Uppers

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The "F" marked forged front sight base is a hard product to find. Mil-Spec for rifles issued to the troops require taller front sight bases on all flat top AR rifles. (.750")
Designed to match the height of Mil-Spec height rear iron sights.
These are new and are not yet drilled for taper pins, and should be installed by a qualified gunsmith.
This includes front sight base only. (Not included are front sight post assembly, sling swivel assembly, and taper pins.)
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit***

27 Reviews

  • 5
    Great quality

    Posted by Michael Thacker on Dec 6th 2020

    This is absolutely as expected. Shipping was great and they always throw in swag which is awesome as well. Who don't love stickers. Will be ordering again.

  • 5
    Fit Great!

    Posted by Robert French on Nov 3rd 2020

    I needed a bayonet lug for my 7.62 AR. I bought this in hopes of this working. I didn't need the sight portion of this item so I had to cut it off. The 3/4 inch hole that has to fit over the barrel was perfect. It worked out perfect for what I need. Now my bayonet fits perfect and I am ready to face any of those communists that I might encounter in the streets.

  • 5
    Fits like it should

    Posted by Serg on Oct 25th 2020

    I shaved off the bayonet lug, drilled, reamed and taper pinned. I was able to walk a target at a hundred yards using a DSG front post, and an Armalite A2 rear handle sight, so good to go as far as sight in. It was a cosmetic addition to a pistol length gas system so I can’t speak to the gas functionality but I’m sure it runs just fine. This piece is a solid beauty.

  • 5
    Front sight base

    Posted by Mike S on Aug 28th 2020

    Nice item. Fast shipping

  • 5
    Order Purchase

    Posted by Vince Cruz on Aug 8th 2020

    Timely and great Customer Service. I don’t know all identifying part names so if you would show all illustrations aspects of the product it would eliminate confusion. Thanks again.

  • 5
    Front sight

    Posted by Donald Childers on Aug 7th 2020

    Great fit and finish

  • 4
    pretty basic but it was what I was looking for

    Posted by Jeff on Jul 13th 2020

    Its a good product but I wish the hole on the bottom was threaded and it came with a set screw also no sight post detent and spring is one thing but not having any on sale was a bit disappointing

  • 5
    Great looking

    Posted by Luis Sanabria on Jul 9th 2020

    Have not started my project just yet but is definitely what I was looking for.

  • 5

    Posted by jeffrey shapiro on Apr 27th 2020

    item was drilled out to barrel with brdm guide and reamed came out perfect