I found a JM 336 not long ago (1979 build date by S/N) and today I finally got my MidwayUSA order with a new rear band with sling stud. I’ll add the rear sling mount also. For sights (buck horns aren’t for me) XS sight rail I’ll probably just use the peeps but I wanted the option to mount a scope or red dot. The XS was expensive ($162.00) but any other set up I looked at would have to come off to mount a optic later. I had the Williams peep sight ($45.00 I think) in the cart for a while but switched to what I really wanted.