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This is a Mock Compensator for the G17 Airsoft replicas. It was desgned from an Elite Force G17. It has internal 14mm- (counterclockwise) threading. This allows it to attach to any G17 with a 14mm- threaded outer barrel. It will require two M4x5 .70 pitch grub/worm screws in order to secure it to the barrel. These can easily be found at many hardware stores. The two side holes for the worm screws are pre-threaded for easier install. This gives the G17 a very aggressive look and feel without adding a lot of weight to the barrel.
Buy one!! Take a pic and let us know how you like it.
The install video for the G19 compensator is exactly the same for the G17