5-Coil Extractor Spring manufactured by Sprinco USA
 
These springs eliminate the need for the Crane O-Ring found in virtually all BCG’s now a days. Which are necessary for operation in 300BLK platforms.
 
Although they work identically to the standard 4-coil with a rubber insert and o-ring, by eliminating the o-ring we thereby eliminate a crucial wear item. And therefore increasing reliability and longevity.
 
Disclaimer: These springs still require the use of the rubber insert. Please transfer your original rubber insert from your previous spring to this one when performing the install.