The Sprinco USA Enhanced AR-15 Hammer Spring (brand part no. 84486) replaces the factory hammer spring with a stronger wound spring built to deliver a harder hammer strike, improving ignition reliability with harder military-crimped primers, steel-case ammunition, or suppressed rifles that see reduced bolt carrier velocity. Sprinco is known specifically for these enhanced-power spring kits used by competition and duty shooters chasing more consistent primer ignition. It’s a direct drop-in replacement for the factory spring in any standard AR-15 fire control group.

Key Specifications

• Built as an enhanced-power hammer spring for a harder strike.
• Fits any standard AR-15 fire control group.
• Installs as a direct drop-in replacement for the factory spring.
• Sold as a single replacement spring, not a full spring kit.
• Installs into the existing factory fire control group with no other parts changed.

Frequently Asked Questions

Why would I want a stronger hammer spring? A stronger spring can improve ignition reliability with harder primers, steel-case ammunition, or suppressed setups where bolt carrier velocity is reduced.

Does a heavier spring affect trigger pull? Yes, a stronger hammer spring will typically increase trigger pull weight somewhat, which is a trade-off for the improved ignition reliability.

Buy the Sprinco USA Enhanced AR-15 Hammer Spring

Get more consistent primer strikes with this Sprinco USA spring from our rifle parts lineup. Order it from our Lubbock, Texas gun shop for fast, direct shipping to your door.