The Custom No4 in .22LR

I could not convince myself to strip apart my No4Mk1* LB with a junk two groove barrel.  I thought about putting a 2A1 7.62mm barrel on it but instead, chose to put a .22LR liner in the junked 2 groove and permanently afix it. I still need to clean up the grinding marks at the muzzle but, it is what it is now. The scope pictured will be swapped for a 3-9×32 Parker Hale. Being that this is now a single shot only, I intend to use it for target work. Should make for a fun little shooter...

The bolthead has had the center drilled out to 1/4" and then plugged with a 1/4" piece of steel. I then drilled an offset hole from front to back at .080". From back to front and only drilling 1.100" down i used a .100" drill. The final bit of work was to cut the firing pin off flush with the striker contact area and reform it to fit in the newly created offset firing pin hole in the bolthead. I did have to trim the boltface down to 0.595" to get proper headspacing too...

Nice! Was your liner thick enough to fill the chamber area? Most of the liners I see are 3/8. How did you address the chamber ?

Very nice!

Goosic wrote: The bolthead has had the center drilled out to 1/4" and then plugged with a 1/4" piece of steel. I then drilled an offset hole from front to back at .080". From back to front and only drilling 1.100" down i used a .100" drill. The final bit of work was to cut the firing pin off flush with the striker contact area and reform it to fit in the newly created offset firing pin hole in the bolthead. I did have to trim the boltface down to 0.595" to get proper headspacing too...

i saw a fellow on the evil tube platform that made a #4 into a .223 with i think what he said was a ruger magazine,  anyway it turned out pretty neat and the magazine made it look kind of like an Ishy rifle.