Tokyo Marui stock adjustment guide NGM4-39

[SWS86]

Hi, I’m trying to remove the stock adjustment guide on my TM M4 NGRS. It’s been converted to deans but I’m really struggling to remove the two screws that keep the guide in place. I believe they may have used Loctite and I’ve applied heat but still can’t get them lose. Unfortunately the screws aren’t the best quality and they’ve nearly disintegrated.

 

Ill have to use other means to get the screws out to remove the buffer tube (i want to install a sling plate) but I’ll need new screws.

 

On checking the part number NGM4-39 many of the suppliers are out of stock and I can’t find any other places to buy a new guide (that most importantly come with screws) meaning my only other option is to find new screws. 
 

My question is, does anyone know the exact screw size?

 

Cheers!