The J P Enterprises AR-15/M16 Alternate 5-Spring Pack is a tuning accessory from J P Enterprises (brand part no. JPSCS-PACK15) built specifically for owners of the JPSCS-15 Silent Captured Spring system. It supplies five alternate action springs of differing rates so a shooter can match spring tension to a specific load, gas system length, or shooting discipline without buying a whole new captured-spring unit. Swapping springs inside the JPSCS-15 changes bolt carrier velocity and felt recoil, which is why competitive AR-15 shooters keep a set on hand.

Key Specifications

• It supplies five alternate springs of different rates for retuning a JPSCS-15 Silent Captured Spring assembly.
• It is built specifically for the JPSCS-15 system, matching J P Enterprises’ AR-15/M16 captured-spring platform.
• Changing spring rate lets a shooter adjust bolt carrier velocity to match a given load or gas system length.

Frequently Asked Questions

Does this include a new buffer or spring tube? No, this pack contains only the alternate springs; it is meant to retune an existing JPSCS-15 Silent Captured Spring assembly.

Why would I want different spring rates? Different loads and gas system lengths cycle the action at different speeds, and swapping to a lighter or heavier spring lets you dial in reliable, softer-recoiling function.

Buy the J P Enterprises AR-15 Alternate 5-Spring Pack for JPSCS-15

Order the J P Enterprises AR-15 Alternate 5-Spring Pack for JPSCS-15 through our rifle parts selection at Schaefer Defense and we will ship it fast, fully insured, from our Lubbock, TX gun shop.