Grayguns Sig Sauer P-Series Master Spring Set

And one kit to tune them all... The Master Spring Set includes both their 17X (17-Pound RED) and 19X (19-Pound BLUE) mainsprings and their competition sear spring. Fit Guide The kit is fully compatible with the following, modern DA/SA SIG SAUER P-Series pistols: P220 P224 P225A1 P226 P227 P228 P229 P226 X-Five Allround