【T-N.T. CUSTOM】
S&T / M1903
UPGRADED SPRING POWER RIFLE

【T-N.T. CUSTOM】S&T M1903 modified detail : 
1.Full disassembly & cleaning & relubrication.
2.Correct the HOP lever & adjust the HOP-UP force average.
3.Make up the tolerances.
4.Cylinder sandblasting and electroplating black chrome.
5.Correct piston airtight.
6.Reduce the trigger pressure.
7.S+ 520mm Precision double I/D air-cushion inner barrel & TR-HOP bucking.
8.S&T M1903 Steel Upgrade Cylinder Retrofit kit.
9.S&T M1903 Steel Upgrade Sear set.
10.Outdoor ballistic adjustment.
10.Muzzle speed 0.2g /120~160 m/s
​(Customized according to customer needs).

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【S&T M1903 Steel Upgrade Cylinder Retrofit kit】
●Stainless Steel Cylinder. (sandblasted & electroplated with black chrome)
●Steel cylinder tail.
●Steel cylinder head. 
●7mm Steel spring guide.
●Aluminum CNC light weight 6 holes piston. (sandblasted + anode red)
●O-ring x3.
●T-N.T. save effort spring.

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【S&T M1903 Steel Upgrade Sear set】
●Steel trigger sear
●Steel piston sear
●Steel spring guide stopper (with adjust screw x1)

◎Significantly increase the service life.
◎Reduce the trigger pressure.
◎Bolt action so smooth & save effort！