Precision CNC machined 6061 aluminium construction Compensator can be removed and installed in seconds. No set screws = no worries about your compensator loosening. The inter threaded design is compatible with M11 threaded adapter Available in silver, black and gold. For TM G17 & G18cAluminum Fast Lock Compensator & Barrel Set with a threadless solution. In many cases a threaded on compensator becomes loose or the set screw(s) become loose. This then causes a problem, it either loses timing, or you have to re-tighten set crews. Another issue is the use of a thread protector when not running the compensator. In most cases, people take them off or run a O-ring and keep checking the protector after a couple of rounds to check tightness. Or it gets lost while shooting. Aluminum Fast Lock Compensator & Barrel Set does not require any thread protector simply remove the compensator and you are done. *PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation/fitting. The fitting may be needed as the condition of each airsoft gun might be different. Regular maintenance is needed for all airsoft guns in order to keep it in good working condition and reduce wear out the issue on parts. The actual performance is based on the overall setting on your airsoft gun. Please consult your airsoft gunsmith for advising. Strong Screw glue is needed for installation. Use a drop of screw glue when installing the screw and wait for it to dry out overnight. Damage could be caused to the screw thread if screw glue was not used.