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Match Grade Hammer Set For TM M4A1 MWS  (UAC-TM-00156) 

Match Grade Hammer Set For TM M4A1 MWS


Match Grade Hammer Set For TM M4A1 MWS - Fully CNC with carbon steel construction and black titanium coating. Adjustable hammer lock allow tuning for crispy trigger pull. This can also prevent single fire problem that causing by tolerance on each gun. 


Tips and Guide: 

Lubricant is needed for all steel parts in order to smooth the mechanical operation but also to prevent getting rusty. Frequent maintenance with lubrication can keep the parts in good condition. 


** Socket set screw require low strength thread lock glue to set.


Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation / fitting. Fitting may be needed as the condition of each airsoft gun might be different.





Installation Guide: 

1. Punch down the 2 pin and remove the upper body.



 2. Unscrew on both side for the trigger guard.



3. Remove the selector. Push down the hammer first, then turn the select into the following position. Push the selector out from the right side until you hear it click. Then turn the selector anti clockwise while keep pulling out from the left.




4. Remove the mag release, push the button on the right then turn the left button to unscrew. 


5. Punch the pin and remove the screw. 



6. Use pin punch to punch the hammer box out. 








 7. Remove the bolt stop lever and bolt stop. Be careful don't loss the bolt stop's spring. 

Bolt stop spring: 3.5 x 11.25 (mm)



 8. Push the pin backward and pull it out. 


 9. Take the sear out and remove the long pin with spring.


10. Unscrew, take the 3 screws out.



11. Open the hammer box. 



12. Take the sear out. Sear spring size: 3.55 x 12 (mm) 


13. Then the trigger set. Be careful the thin trigger lever drop off from the back.


 14. Remove the hammer. Be careful of the hammer spring will pop out. 


 15. Finally remove the sear, fire pin and the spring. Be careful of losing the ring. Sear spring size: 3.55 x12 (mm)


 16. Remove the trigger plate and spring. Trigger plate spring size: 3.2 x 13.15 (mm)


 17. Press and hold the hammer lock and remove the cone. Then remove the hammer lock and spring. Be careful the spring pop out. 

Hammer lock spring size: 3.6 x 11.3 (mm)




Problem with the single fire. 

1. As our hammer lock is adjustable, for the first try out, reset the socket set screw and remain inside the hammer lock, (don't let it bulb out) then try the operation. see if it work properly. Use tiny drop of screw glue to the socket set screw before tuning. 

2. If you like to fine tune for more crispy trigger pull, adjust the socket set screw round by round, and try out, as it is very sensitive. It will become full auto if the socket set screw bulb out too much. 




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