Included in our calibration kit is a Full-length, stainless steel guide rod to help prevent spring bind and improve cycling. But best of all it allows you to quickly swap out various springs weights to fine tune your pistol to the ammo you are feeding it for the best performance. You can keep your factory guide rod assembly intact.

15 Round Sig Sauer 220 22LR Conversion Magazine upgrade turns your 10 round magazine into a 15 round magazine.

Included in our calibration kit is a Full-length, stainless steel guide rod to help prevent spring bind and improve cycling. But best of all it allows you to quickly swap out various springs weights to fine tune your pistol to the ammo you are feeding it for the best performance. You can keep your factory guide rod assembly intact.

Kimber 1911 22LR Replacement Magazine Spring.

13 Round Sig Sauer 220 22LR Conversion Magazine upgrade turns your 10 round magazine into a 13 round magazine.

Included in our calibration kit is a Full-length, stainless steel guide rod to help prevent spring bind and improve cycling. But best of all it allows you to quickly swap out various springs weights to fine tune your pistol to the ammo you are feeding it for the best performance. You can keep your factory guide rod assembly intact.