Hatsan Blitz Barrel Screw Size?

[DevilsLuck]

So I'm attempting to remove the barrel from my Blitz. Or rather, reseat it. It seems to have slid forward a little bit, and no longer engages the magazine properly, and thus the mag moves, and causes jams. The two screws on the top of the receiver, take a 2.5 mm hex head. But I don't know the specifics as to the thread pitch, length, and all the details needed to order new ones from McMaster Carr. I'll likely be needing at least one new screw as it is seemingly clogged with Loc-Tite, and my attempts at picking it out of the head seem to be doing as much harm, as good. So can anyone tell me exactly what screw I need to order to replace this with? And if you could drop a link, that would be even better! Thanks in advance!

P.S. Any tips on dissolving blue Loc-Tite, so I can get this thing free?

 

[DevilsLuck]

Also a torque spec would be handy if anyone knows..?

 

[DevilsLuck]

Update: While I was unable to contact anyone who knew the answer to my question; I instead ordered a variety pack of metric set screws from Amazon. After a brief trial, and error I've discovered the screw size to be...

While this specific screw is a tad longer than OEM, it is otherwise a perfect fit. In fact I think the longer screw is somewhat better, in that it should offer more surface area to grip the the threads.

These set screws hold the barrel in place, and are the center, and right most holes in the receiver, as pictured.

The left most hole is a smaller screw size, M4 X 8, and for what it's worth, my rifle came with this hole being empty. I don't know why. But I will be adding this set screw as well. Perhaps that will keep my barrel from shifting in the future.

I just wanted to take a moment to update this post, incase someone in the future has the same, or similar question regarding the Hatsan Blitz.

 

[DevilsLuck]

Adding this photo to illustrate what I meant by the longer screw offering a better fit. The new screw is in the center hole, and the original is in the right.