The Hair Pin Trigger Kit is designed to make any electronic, manual, or response Tippmann trigger faster and more sensitive. Tippmann Hair Pin Trigger Kit fits all  markers. The kit comes complete with 5 different pin sizes which will allow you to fine tune your trigger and sear positions for maximum performance. Overall the pins make any trigger shorter and easier to pull. This makes for less time between shots, and for people using e-grips...less battery use with each shot.