Feedneck not clamping my hopper

[Carnage reigns]

I have a RPG SubZero and for some reason my feedneck is not gripping. I have it tightened all the way down.

[zondo]

Did you try another hopper?

Has it worked before with that hopper?

If the feedneck is narrow, you can try wrapping some electrical tape around the neck.

[Carnage reigns]

Yes it worked well with that feed neck before. I have not tried another hopper yet.

[ProblemKinder]

wrap a couple rubber bands around the feedneck.

[kwood]

wrap a couple rubber bands around the feedneck.

ill second this
if you use electrical tape (or any tape)
you will just end up with a nasty gooey leftover adhesive when you take it off
and no one likes to deal with a slimy feedneck