Armory Craft Sig P220 P227 (226 in 40sw) Recoil Tuning Kit
 
Sig Sauer P220 P227 (or P226 in 40sw) Complete Recoil Tuning Kit  - 4 Parts
Fits all P220 models (DASA, SAO, Elite, Legion, etc.)
 WILL NOT FIT P220 Carry
 WILL NOT FIT P226 S (i.e Gen I X5/X6)
 
Stainless steel polished guide rod made out of hardened steel and guaranteed for life.
Guide rod weighs 32g (vs. 14g stock SIG stamped hollow guide rod)
Color coded 16, 18 and 20 lbs recoil springs for optimal tuning of recoil impulse with various types of ammunution.