Put the rings and scope on the rifle,position it where you want it.Take scope off and center mark right behind the rear ring.Take rings off and tear down gun to the reciever.Lightly center punch center mark,not to hard its aluminum.Drill a straight hole through the reciever(AT center mark)using a #25 drill bit(.1495 of an inch).If you dont or cant find a #25 drill bit you can use a 9/64 drill bit(.140625 of an inch) because the reciever is soft aluminum,I used the 9/64 with no problems.Tap the hole with a 10-24 Tap,if you drilled the hole with the 9/64 bit it will be a little tight at first,but it will go with some perswasion.Use a little oil on the tap,and about every turn back the tap out a quarter of a turn(this breaks of the shaving).After you got your hole tapped take a 10-24 allen head bolt run it all the way down tight to the reciever.Look on the inside of the reciever and count the number of threads protruding through the reciever,take the Allen head bolt out,count the treads and mark(you want the Allen head bolt to fit flush on the inside of the reciever{thread side}).Run a thin nut up the bolt,and using a hack saw cut off excess threads.Take nut off(cleans the cut)refit bolt and make sure its flush on the inside,if not finish it with grinder or sand paper(IT MUST BE FLUSH WITH THE INSIDE OF RECIEVER).Once your bolt is at the right length paint it black(you'll never know its on the gun).Put a little "BLUE" loctite thread sealer on the threads and install. Dont over tighten Its Aluminum remember(just snug it good.Clean the inside of reciever of any metal shavings and loctie.But rear ring to bolt,problem solved.Sound to complicated try the bkl rings.
