I have a barrel I've purchased that was a stripped PSA CHF barrel. It originally had a pinned on FSB, but was sold to me stripped. I have a FSB with set screws. Is it ok to use set screws on a barrel drilled for pins? It will line up vertically and the set screws go partially into the drilled holes.

I can post pics this evening, just curious if anyone has dealings with something like this.

Pics up:

I would not try it on this barrel UNLESS you do a complete set screw mod. with two more set screws coming in from the bottom of the FSB.

If you only use the side set screws (a method I've never been a fan of), the set screws will be engaging those little webbed areas where the former pins were. It will probably be nearly impossible to keep the FSB from canting and I don't think it will be secure enough.



Do it like this and you'll have a better chance of it working.



http://acatholicmechanic.blogspot.com/2016/02/diy-a2-front-sight-base-install.html



I've only ever used this method on fresh stripped barrels so I'm not sure of the results you'll get with yours.

Thanks for the reply. Sadly I may have to abandon the FSB idea and go with a free float rail and lo-pro block.

Only option I've seen is the JP clamp on adjustable one. For $150 it's kind of insane to put in a M4 style non-free floated upper.

Here is another a4 sight
http://shop.deztacticalarms.com/A2-Fixed-Front-Sight-Clamp-on-750-w-Bayonet-Lug-DEZ-1035-GB.htm

You can add a threaded pin from the bottom.  There is a thread on here telling you how.