This is the mount I used. http://www.leapers.com/prod_detail.php?mitem=mount&level1=Barrel_Mount&level2=&itemno=MNT-BR003XLS&status=&mtrack=11m
I used the un-railed half as a spacer by cutting off the flats with holes. When I tapped the stock, I held the railed piece against the rear of the gas tube. I drilled the tapping holes undersized to get as much thread contact as possible. The hex bolts included are 6-32 and I am engaging 6 threads where I drilled.
Is it Ideal. no. as I am mounted to the stock. I have to remove the rail to do a full cleaning. This is my H
I used a UTG mount, drilled the tapped holes for a tight clearance of the UTG hex cap screws and tapped into the Kush stock 4x 6-32. I can finally see with the addition of the Bushnell holo.
20 round drum from the shoulder wasn't ideal. I have to bend my wrist, I like my wrist straight like a punch. From the hip, no problem althought wrist is bent the other way, if that makes sense.