The S&W Adjustable Main Spring Tension System gives the shooter the ability to adjust main spring tension to suit their needs. Final adjustment is locked in with a brass tipped set screw that acts as a jamming system. The adjustable main spring screw is not marred in any way. Total trigger weight flexiblity. The entire competition revolver is needed for the modification.

$125.00 Installed Plus return Shipping of your finished S&W revolver.


Adjustable Main Spring Set Screw Adjustable Jam Set Screw Adjustable Main Spring System Holes / Set Screw Locations