This design does not include a grub screw, so it will not leave any mark on your gun.
Please, note the thread is 1/2" UNF !
A thread protector and replacement (longer) fixing bolt are included.
Available in silver too, just drop me a note about it, the default will be black.
Contact me for advice on silencer.
Note to eBay:
This item is an accessory for airguns only and is allowed to be listed.
It's NOT a silencer or a firearm part or accessory - Please don't end this listing in error.