This is a replacement post assemble for PRI gas block base. Post will work with Cross bolt version or set screw base. Part numbers 05-0025 or 05-0027
Replacement Gen I front sight post assembly to get the original front post look. This post will work on PRI's 750 and 625 diameter front sight gas block bases. The post comes full assembled, all you need to do is remove old post by tapping pin out of the bottom of the base from the front to back. Be careful to catch the tension spring in the pivot pin housing.