S&T M1903 Steel Upgrade Cylinder Set
●Stainless Steel Cylinder.
(sandblasted & electroplated with black chrome)
●Steel cylinder tail.
●Steel cylinder head.
●7mm Steel spring guide.
●Aluminum CNC lightweight 6 holes piston.
(sandblasted + anode red)
●O-ring x3.
●T-N.T.custom save effort spring.
S&T M1903 Steel / CNC Upgrade Sear Set
●For S&T M1903
●Steel trigger sear
●Steel piston sear
●Steel spring guide stopper (with adjusting screw x1)
◎Significantly increase the service life.
◎Reduce the trigger pressure.
◎Bolt action so smooth & save effort！
S&T M1903 TR-HOP S+ 517mm RETROFIT KIT
●For S&T/SW M1903
●Aluminum/CNC one-piece HOP chamber set
●TR-HOP bucking.
●T-N.T. S+ inner barrel 517mm
S&T M1903 HOP CHAMBER
●For S&T M1903
●T-N.T. TR-HOP bucking x1
●CNC / One-piece HOP chamber x1
●CNC / HOP lever x1, PIN x1
●O-ring x1, jimi screws x2, sleeve x1