Details
M&P 2.0 4.0" models can use either a "flat" spring like this ISMI spring or a "round" spring like the Wolff spring. If using a captured guiderod, we recommend the use of a "flat" spring like this ISMI spring. These springs are excellent springs and can be used for all types of shooting.
XP Recoil springs are recommended for magnum and stronger than average factory ammunition. The XP springs are recommended for 10MM and .45 compact guns.
The ISMI can also be used with an uncaptured guiderod as well. Be sure that your guiderod was made for an ISMI recoil spring. The Wolff spring has a larger inner diameter.
This spring pack includes the following ISMI springs for your uncaptured CARVER uncaptured guiderods for your MP 2.0 (4") Model:
Qty 1: ISMI 18lb Recoil Spring
Qty 1: ISMI 20lb Recoil Spring
Qty 1: ISMI 22lb Recoil Spring
The stock recoil spring in your MP 2.0 4" is a 18lb recoil spring.
If you have any questions, please let us know.