utg l96 cocking bolt.

First thing is to make sure everything is seated properly in the cylinder. Check the piston sear for any abnormal wear as this could be a culprit. In addition check to see there is no wear on the piston. If that doesn't work, check to see if the cylinder slides smoothly by itself inside of the receiver.

Fixed it!!! Turns out the bolt handle wasn't screwed on securley and kept wobbling.

Try teflon tape or blue loctite to keep that screw from sneaking out.

Thanks!