A Geissele trigger is a premium AR-15/AR-10 fire control upgrade known for crisp breaks, short resets, and high reliability. Offered in single- and two stage variants (e.g., SSA, SSA-E, SSP, S3G, SD-C), with curved or flat shoes for preferred feel. Works with mil-spec AR-15 lower receivers (0.154″ pins), safety selector, hammer/disconnector interfaces, and standard trigger/hammer springs; many models also fit AR-10/.308 lowers that accept AR-15 pattern triggers. Fully compatible with standard AR uppers/BCGs and buffer systems. Ideal for duty, competition, and precision builds.
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