The Geissele 2 Stage (G2S) Trigger 05-145 is a non-adjustable two-stage trigger designed for compatible AR-platform configurations. Manufactured by Geissele Automatics, the G2S uses tool-steel construction and a two-stage design that provides a defined first stage followed by a distinct second-stage release. The Geissele 2 stage trigger is configured at the factory rather than offering user-adjustable pull settings. This fixed configuration keeps the trigger assembly straightforward while maintaining its specified characteristics after installation. The two-stage arrangement provides a clearly defined sequence through the trigger pull for users who prefer this style of trigger operation. From the exterior, the Geissele G2S trigger has an appearance similar to the SSA when installed. The two assemblies differ in their internal construction and manufacturing details, however. The G2S uses a different method of retaining the hammer pin, distinguishing its internal design from the SSA. The trigger is manufactured from the same tool-steel material used in the SSA. Its components are produced for use as a dedicated AR-platform trigger assembly, with the design focused on consistent fit and operation within compatible configurations. Another distinguishing characteristic is the marking and inspection process. The G2S does not feature laser markings, and its components are spot checked for magnetic-particle inspection. These details differentiate the G2S from other Geissele trigger assemblies while maintaining its distinct two-stage configuration. For those looking for a Geissele trigger with a fixed two-stage design, tool-steel construction, and a familiar AR-platform configuration, the G2S provides a purpose-built option within the Geissele Automatics lineup. Features: Non-adjustable two-stage design Tool-steel construction Designed for compatible AR platforms SSA-style external appearance Distinct hammer-pin retention method No laser markings Spot-check magnetic-particle inspection Factory-set configuration Geissele Automatics Geissele Geissele 2 Stage (G2S) Trigger 05-145