Scratched my head for a while figuring this out. There is no good way to glue a cup into the hollow stock (at least that I would trust a $4000 rifle and scope swinging off of). So I came up with this, the location allows sling use on either side of the stock, and mimics the way I sling my AR carbines with a combat sling.
This is on my AR10 stock, I haven't got to pull my AR15 stock apart yet, but they should be identical in this area.
First, go to Lowes and buy a couple of 1/4" X 20 TPI x 1/2" long button head cap screws and a 2 pack of 1/4" x 20TPI coupling nuts. Sand or file off the zinc plating on the nut and weld the coupling nut to the flush cup as shown......
Disassemble your stock completely (you can leave the 2 pressed in nylon detent cylinders), mark the location for the 1/2" hole, bolt the 2 bare stock halves back together and drill it out, (note the reinforcing rib and miss it)...
Measure the depth of your stock recess, double it and file/grind the length of the coupling nut to fit (mine measured .740") make sure to remove the same amount on both sides.
Put the ass'y in place and mark your holes to drill in the side of the stock (make sure the cup is slightly higher than the surface or your swivel will not seat correctly), drill the 1/4" holes, assemble one bolt in one side to hold the ass'y in place, put your stock back together and put the other bolt in the other side.
Looks factory!!
This is on my AR10 stock, I haven't got to pull my AR15 stock apart yet, but they should be identical in this area.
First, go to Lowes and buy a couple of 1/4" X 20 TPI x 1/2" long button head cap screws and a 2 pack of 1/4" x 20TPI coupling nuts. Sand or file off the zinc plating on the nut and weld the coupling nut to the flush cup as shown......
Disassemble your stock completely (you can leave the 2 pressed in nylon detent cylinders), mark the location for the 1/2" hole, bolt the 2 bare stock halves back together and drill it out, (note the reinforcing rib and miss it)...
Measure the depth of your stock recess, double it and file/grind the length of the coupling nut to fit (mine measured .740") make sure to remove the same amount on both sides.
Put the ass'y in place and mark your holes to drill in the side of the stock (make sure the cup is slightly higher than the surface or your swivel will not seat correctly), drill the 1/4" holes, assemble one bolt in one side to hold the ass'y in place, put your stock back together and put the other bolt in the other side.
Looks factory!!
