what are these holes for in the rail?

[sideshow99]

I can't put push-pin sling adapters in there, nor screw-in swivel studs like on the RRA rails, so what are they for??

thanks

[bdavison]

Asthetics...i guess.

The mil-spec ones had a allen screw mounting option for mounting the rifles on a swivel mount like in a vehicle...im thinking this was a carry over that nobody ever realized was useless to civilian versions. And somehow it went from being only tapped on the bottom rail to all four.

Ive never seen anything that required their use other than that mount.

There are a few of them out there that are threaded to accept a sling swivel mount, which again is kinda useless because they make picatinny swivel stud options that dont need to be threaded. Same goes for the harris bipod...they make a picatinny mount for that as well.

[techmike]

I have seen some bolt-on rail risers that utilized those holes, but nothing else.

TM

[rodent.22]

Perhaps after the rail is sized for length, the hole is put thru to be able to move the part on the CNC machine to finish off the grooves, etc.

[sideshow99]

thanks, good to know I'm not crazy.  :o