Brownells list 2 carrier springs for the m2. Are they the same thing? Which one do i get?
1. http://www.brownells.com/shotgun-parts/trigger-group-parts/carrier-parts/carrier-springs/carrier-spring-prod23569.aspx
2. http://www.brownells.com/shotgun-parts/trigger-group-parts/carrier-parts/carrier-springs/carrier-spring-prod6193.aspx