Store › Springfield Spring-Lock Replacement Post Bushing [2100013] Springfield Spring-Lock Replacement Post Bushing [2100013] $19.99 Spring-Lock™ Replacement Post BushingReplacement bushing for the top of the non-locking Spring-Lock™ post. Add To Cart Added! Spring-Lock™ Replacement Post BushingReplacement bushing for the top of the non-locking Spring-Lock™ post.