KAK Industry AR-15 LPK Spring Kit Silver. These new springs are manufactured by KAK using the best materials. Every spring in the lower receiver is included. Get one for new builds replacement parts or spares. Specifications for KAK Industry AR-15 LPK Spring Kit: Manufacturer: KAK Industry Color: Silver Gun Make: AR Platform Gun Model: AR-15 Features of KAK Industry AR-15 LPK Spring Kit Fits AR-15 Silver: Compatible with AR-15 Package Contents: KAK Industry AR-15 LPK Spring Kit KAK Industry AR15-KT-008: AR-15 LPK Spring Kit Silver