I used the oem release and added a 5.56 bullet. drilled and tapped with 10-32 stud.
The charging handle is from a 22magnum.
I machined a new safety button and knurled the ends.
A aftermarket straight leg trigger with stop.
Added a setscrew to the sear to control pre-travel.
Tried several different trigger return springs, ended up with a modified oem setup. Were the return plunger rides on the back of the trigger I added a steel setscrew, radius the face so I have a small contact area, steel on steel.
Trigger pull is a crisp 1lb 8 oz.
I jeweled the bolt, radius the end, set head space and added a roll pin above the firing pin for added control of movement.
I also added a setscrew to each side of the receiver that locks the trigger group in position.
I made a bedding pillar and bedded the stock with jp weld.
After selling the oem barrel and stock I had a hundred bucks in it. Two hundred for the Fajen stock and GM bull barrel off e-bay. One fourteen for the Muller AVP, forty bucks for Talley rings and about forty in miscellanies parts.
A fun build that exceeded my hopes in accuracy.