how do I mount the Thrunite Catapult to my rifle

[NY bouncer]

i've been looking all around and trying to figure out how to moun the Thrunite Catapult to my rifle... it has a body diamter of 31mm. The closest scope rings available would be 30mm, 34mm, and 35mm.. I wonder if I could get the 30mm or 34mm to fit?? I don't see any mounts I could buy for a flashlight with this kind of body diameter. Does anyone have any suggestion?. Maybe I would buy 34mm scope rings and use some sort of shim or insert that could fit around the body to make up the 3mm like spare rubber pipe... idk.

 

[papajoe]

34mm rings with a tight, careful wrap of aluminum strips as shims should do the trick.

What kind of rifle ? Whatcha shootin' ?

 

[bstrickler]

30mm + heavy sand paper should do the trick. Only need to remove 0.5mm from either side of it, so it shouldn't take long.

~Brian