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

(18 reviews) Write a Review
Stock Status: In Stock
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***

18 Reviews

  • 5
    Good product

    Posted by James on Oct 13th 2016

    Good m4 style sight and block. Need to buy pins for it.

  • 5

    Posted by Carlos Herrera on Oct 1st 2016

    Fits perfectly

  • 5
    Correct FSB

    Posted by anonymous on Sep 22nd 2016

    Well made, works well. Fast and positive buying experience.

  • 5

    Posted by Wesley Palmer on Jul 11th 2016

    Picked up an F marked front sight base and received it quickly. Have not installed it yet but will shortly. Love it so far

  • 3
    Good base but no post or detent

    Posted by scott arney on Feb 1st 2016

    I was hoping it came with the front sight post, spring and detent. Not the case. May have said it in description and I missed it, but I would assume it came with it. Good excuse to buy a thinner sight post and spring and detent are only a couple dollars each. Sight base itself has an decent smooth finish better than I expected being a generic mil spec part.

  • 5
    Good stuff

    Posted by Ian Breske on Jan 25th 2016

    I can always count on bcm to deliver the goods.

  • 5
    Front Sight Base... Milspec

    Posted by ALAN BEZIO on Jan 9th 2016

    Great product. ..

  • 5
    Sight dilemma solved!

    Posted by J R on Nov 11th 2015

    This sight base was the answer to my front sight headache! Couldn't figure out why I had such large elevation on the front post until BCUSA turned on the lights with the sight base for flat tops! I just tapped for two set screws in the base and the job was done! Thanks BC!

  • 5
    Great FSB !

    Posted by anonymous on Mar 30th 2012

    Great quality Milspec FSB. This is my first purchase, and I will buy again. You guys really sell good products and the delivery was super fast. Thank you!