Front Sight Base F - FSB (ID .625) - Milspec for Flat Top Uppers

Stock Status:
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. (.625")
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***

16 Reviews

  • 5
    "F" stamped A2 sight pillar .625"

    Great quality, exactly as advertised.

  • 5
    F marked sight base

    This was forged and machined well, finish was good.

  • 5

    Fit as described
    Arrived ahead of schedule
    Lives up to the BCM Reputation I have come to expect
    The SWAG tossed in was a welcomed addition I did not expect

  • 4
    Good fit, rough finish (not a bad thing, though!)

    The sight fits well, as needed, and has a little weight to it, so it seems sturdy. I also like that there is a roughness to the ramp and verticals. This should prevent glare and provide “toothing” for the paint if I decide to camo this rifle.

    I am very pleased.

  • 5
    Front Sight

    You had when nobody else did....

  • 5
    Hard to find FSB

    I looked at several other suppliers for a .625 FSB for a flat top lightweight build and most were cast , this was a no brainer, Bravo comes thru once again, with a quality forged FSB. Just what I was looking for, thanks guys for still caring about quality.

  • 5
    Quality Parts

    This is a great company, with fantastic quality parts. I will be buying from them again.

  • 5
    .625 FSB

    The FSB I ordered is what it is advertised to be. Steel construction and a precise fit on a .625 barrel. I highly recommend this product.

  • 5
    Milspec FSB

    Perfectly finished in phosphate. BCM is the only place I could find one in stock at a very reasonable price.