TTI INFINITY TDC Hop-Up AAP-01 Black

Top Dead Center (TDC) HOP-UP pressure adjustment
CNC 7075 aluminum one piece deign
. HOP-UP bucking warp-around design, makes a better seal
C-Clip with screw design provides stable inner barrel fitment
Spring guide pin is threaded and remove-able.
Suitable for Action Army AAP01 and AAP01C