Bore up kit for the M4A1/SR16/M733 TM standard replicas

  Bore up kit for the  M4A1/SR16/M733 TM standard replicas

A set of a cylinder, a cylinder's head and the piston's head is made especially for the TM M4A1/SR16/M733 replicas so that their capabilities can be increased by increasing the diameter of the main air system what will result in a greater muzzle velocity without changing the main spring for a stronger one. This also influences the replica's lifespan.

Each part that is included in the set was additionally reinforced. That is why the set is perfect for the cooperation with stronger springs.

The double sealing of the cylinder's head allow to acquire a very good sealing. In composition with the reinforced sealed nozzle which is also included in the set we gain a better sealing than the one represented by the standard parts.

The ball bearing directional piston's head has a special shape and ensures a quiet operation.

A M120 or stronger main spring is required for a proper operation of the set

   The set includes:

- a cylinder's head with double sealing and increased diameter,
- a directional piston' head with increased diameter,
- an increased diameter cylinder,
- an increased diameter sealed nozzle,