Ok all, many thanks, will invest in some loctite, and give it a bash, will let you know how I get on

Hi, the only screw I can see is the one straight behind, was told online to use a loctight product, but does not seem right

Hi all, my guns bolt has gone all floppy and come loose, I have taken it off and tried to reset it, but now the grub screw won't go all the way home, hence it not being tight, any ideas please