Guarder M4 Bore-Up Cylinder Set

The Guarder M4 Bore-Up Cylinder Set can be installed as an upgrade in your M4 and replaces the original set present in the airsoft replica.

A Bore-Up set uses a larger air volume and is usually used in combination with a wide bore barrel (6.05mm and above). You can also use this set when, for example, you want to use a longer barrel than the standard one in your airsoft replica.

Please note, standard parts can never be used in combination that are present in such a set. This is due to different internal dimensions of the cylinder, for example.