Colt M4 / AR15 Semi-Auto Fire Control Group — 2021 Updated Hammer
Factory-new Colt parts or new take-offs from Colt lower receivers, inspected and repackaged at our shop.
This is the full Colt semi-auto fire control set — trigger, hammer, disconnector, and associated springs and pins — with the updated 2021-spec hammer that Colt transitioned to across its LE6920, LE6920MPS, and M4 Carbine production lines. SKU CO997950. 100% genuine Colt, sourced directly from Colt's Manufacturing and packaged for installation in any mil-spec AR-15 lower.
The updated hammer is the detail that matters for Colt clone builders: the geometry was revised to address disconnector wear and improve reset feel without changing pull weight or legal configuration. If you are assembling a correct Colt SP-series, LE-series, or M4 Commercial Carbine, this is the fire control group Colt is currently installing on the factory floor. Any other "mil-spec" kit is close; this one is the real thing.
Parts may arrive with factory oil — that is correct and should not be wiped dry before installation. Drops into any standard AR-15 / M4 lower without modification.
Order yours today and finish your Colt build with genuine Colt fire control.
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