VZ58 side mount screws

[salmonriverfire]

I am having trouble removing the small plug screws in the receiver where the side mount goes on my VZ58. I can't seen to find an Allen key that fits it. 2.5mm is to small and 3mm is to big. Same goes for 3/32 and 7/64. I have stripped 3 torqs bits and a couple of Allen keys attempting to get them out and have so far only moved one out one turn.

Any help on the proper size?

 

[leebuilder]

You may have to modify one to fit. If they are that tight it may have been loctited use a heat gun to melt it.
be well