For anybody interested;
Using 5slot picatinny rail, theoriginal sling stud was a bit too short. It was grabbing but, it was sitting in the rail so low that it became unusable as a sling stud. With a spacer, to make it usable, it wouldn't grrab the threaded insert in the forearm. No problem. It got replaced with a M5 screw. Than, I match drilled the forward mount screw for a helicoil. Naturally, I screw up and put in a M4 helicoil ony to realize that I didn’t have a proper M4 screw on hand... No problem, I thought, I put the project aside thinking that I finish it on Monday. Than... I got impatient. I removed the stock to find out that the forward hole was in a perfect void offering plenty of room to use another M5 screw and a simple nut on the inside. I removed the M4 helicoil and used M5 screw without drilling out clearance hole for it. Lo and behold, I didn't even need a nut! I'll add a nut if it ever straps but it tightened so nicely that I doubt I will ever need it!
Now, I have 3 slots avaliable for the tripod (perfect) and 1.5 slots for a thingy to attach a classic a classic 2 point qd sling...