【S&T M1903 HOP-UP Chamber set】
Contents:
●Aluminum / CNC HOP-UP chamber *1, O-ring *1
●Aluminum / CNC HOP-UP arm *1, PIN 1
●Positioing HOP nub 6*6mm / 70° *1, 80° *1
●TR-HOP bucking for M1903 *1
●bronze spacer *1, screws *2
