The Sprinco M4/CAR-15 Enhanced Power buffer spring and 5-coil extractor spring kit (Sprinco part no. 25008) pairs a blue Enhanced Power buffer spring with an Extra Power 5-coil bolt carrier extractor spring. Sprinco packs the buffer spring in a hard tube alongside a chrome silicon extractor spring so both wear parts of an AR-15 carbine can be refreshed in one order. The Extra Power 5-coil extractor spring carries a heavier load than an OEM spring, and Sprinco says that removes the need for a D-Fender ring. It is a straightforward reliability refresh for a carbine that has seen a few thousand rounds or a build that needs its recoil system tuned.

Key Specifications

• The buffer spring is Enhanced Power, color coded blue so it is easy to tell apart from the other loads in the line.
• The buffer spring is moly-plated chrome silicon, a material chosen for durability under repeated compression.
• The extractor spring is a Extra Power 5-coil chrome silicon bolt carrier extractor spring, which holds the extractor against the case rim.
• The buffer spring is made for M4 and CAR-15 carbine buffer systems, so it fits an AR-15 carbine buffer tube.
• The extractor spring fits M4, M4-A, AR-15 and M16 bolt carriers, the common pattern across AR-15 rifles and carbines.
• The buffer spring ships in a hard tube, which protects the coils in transit and on the shelf.

Frequently Asked Questions

What is in this kit? One Enhanced Power moly-plated chrome silicon carbine buffer spring, color coded blue and supplied in a hard tube, and one Extra Power 5-coil chrome silicon bolt carrier extractor spring.

Is the 5-coil extractor spring right for every rifle? Sprinco notes the 5-coil spring can be aggressive on case rims in rifles with 18-inch and longer barrels and may be too strong for bolts with very tight face tolerances. Its 4-coil spring is the alternative for those builds.

Where does Enhanced Power sit in the buffer spring line? It is the blue spring, heavier than the white standard and the Hot White intermediate springs and lighter than the red Extra Power spring.

Buy the Sprinco M4/CAR-15 Enhanced Power Buffer Spring and 5-Coil Extractor Spring Kit

Two springs, one order, and a carbine that cycles the way it did when it was new. Sprinco builds these for AR-15 shooters who would rather replace springs on a schedule than chase a stoppage. Browse more rifle parts and order from our Lubbock, Texas gun shop for fast shipping.