TTI INFINITY TDC Hop-Up UMRX/VFC Glock GEN.5 Series BLACK

Suitable for UMAREX / VFC Glock 17 Gen 5, G19 Gen 4 and Gen 5, G19X and G45
Top Dead Center (TDC) Hop Up Adjustment System
CNC 7075 aluminum one piece deign
HOP-UP bucking warp-around design, makes a better seal