I have managed to get hold of some genuine SMK mainsprings. Ideal for the majority of SMK rifles. The springs will have to be cut to suit your power needs to keep them below 12 ft lbs
Spring sizes are as follows.
Length 295mm
Outside diameter 19.7 +/ - mm
Inside diameter 13.9 + / - mm
Wire thickness 2.9mm
I have managed to get hold of some genuine SMK mainsprings. Ideal for the majority of SMK rifles. The springs will have to be cut to suit your power needs to keep them below 12 ft lbs
Spring sizes are as follows.
Length 295mm
Outside diameter 19.7 +/ - mm
Inside diameter 13.9 + / - mm
Wire thickness 2.9mm