Rankin Industries SP4 Trigger Group

Product Description

Rankin Industries SP4 Trigger Group

The AR-15 SP4 Trigger Group.  SP4 is a hybrid DLC type coating that is the hardest, slickest, and most flexible coating on the market.  It makes for a super nice trigger pull.  Silky smooth with no grit at all.  The trigger group is made of stainless steel and undergoes a special polishing process prior to getting the SP4 coating applied in an extreme vacuum.  This is the latest and greatest coating for trigger groups and bolt carrier groups.