So what is the best way to get that stock screw out. It appears to need a special wrench with a blade about 5/8" long X1/8" wide, non tapered with guide pin holes at each end. I cannot budge it with a screw driver or impact gun and I am fearful of tearing out the slot trying.
My method that I posted in a thread last year. To remove a fixed stock . It would work for a folder too.
1. Remove buttplate
2. Remove receiver cover
3. Stuff a paper towel into back of receiver
4. Liberally spray WD40 into stock. Create a pool of it around the screw. It will find it's way down to the threading.
5. Lean rifle barrel down for about 1.5 hours, or 2 beers.
6. Lay rifle on floor, straddle it, and hold it in place with your knees
7. Jam a 12 inch 3/8 screwdriver into the screw and give it a few solid whacks with a hammer
8. Put 3/8 wrench on screwdriver shank
9. Twist until prolapse is imminent, or you start seeing bright lights. Yelling while doing this step helps.
10. Revel in your triumph
Warning: Do not skip step 3. That screw has a hole in it and you will make a mess. The paper towel not only absorbs the mess, it holds the wd40 against the end of the screw and lets it soak a little. I could've probably sprayed the end of the screw, but didn't want to make a mess of my clean rifles. This was neat and tidy.