UTG® M LOK® Ultra Slim Handstop, Blue 14mm ccw Multiple adjustment points to control 2276344 Multiple adjustment points to control pre travel and over travel to shorten trigger pull and prevent damage to electronic switches on controller boards Semi Auto and safetyHopup: Yes • Compact and Slim Size Does Not Interfere with Other Accessories and Parts• Mounts Bidirectionally Tailoring to the User's Preference in Handstop Orientation• Lightening Cuts Reduce Overall Weight• Ergonomically Contoured and Serrated Front and Rear Handstop Faces for a Secure Support Hand Placement• Precision Machined from Aircraft Aluminum and Finished in a Matte Blue Anodize• Includes M LOK® Hardware and Installation Tool