The Sprinco Enhanced Power Blue M4 carbine buffer spring (Sprinco part no. 25007) is a moly-plated chrome silicon return spring for M4 and CAR-15 carbine platforms. Its design loads are approximately 15 percent greater than Sprinco’s White spring, which makes it the stronger step for owners tuning a carbine. Sprinco brought it to market at the encouragement of Mike Pannone of CTT Solutions. It is supplied in a hard plastic tube with Sprinco’s blue color code.

Key Specifications

• The power rating is Enhanced, with design loads approximately 15 percent greater than the White spring.
• The color code is blue, which identifies this spring among Sprinco’s power ratings.
• It fits M4 and CAR-15 carbine buffer tubes, the platform named in the maker’s listing.
• The wire is ASTM Grade A877 valve quality chrome silicon, a spring steel chosen for fatigue life under repeated cycling.
• The spring is heat treated, stress relieved and dual-stage shot peened after winding, which improves durability.
• The finish is moly-plated with a re-micronized molybdenum disulfide formulation that reduces friction.
• It ships in a hard plastic tube, which protects the spring until it is installed.

Frequently Asked Questions

How much stronger is it than the White spring? Sprinco states that the design loads of the Blue spring are approximately 15 percent greater than the White spring.

What platform does it fit? It is listed for M4 and CAR-15 carbine platforms.

How is it packaged? It ships in a hard plastic tube.

Buy the Sprinco Enhanced Power Blue M4 Carbine Buffer Spring

A carbine that needs more spring than the standard White gets it from this Blue step, with the rating named plainly. Order it with our other rifle parts from our Lubbock, Texas gun shop for fast, direct shipping.