Geissele Trigger Fitting Pin 02-313 is designed to assist with trigger installations, solving the awkward moment mid-swap when neither pin wants to cooperate. This Geissele trigger pins tool is sized identically to the actual trigger and hammer pins, which is what makes it useful in two different ways. When removing an existing trigger, it presses the original pins out cleanly rather than fighting a stuck or slightly deformed pin with a standard punch. When installing a new trigger, it works as a slave pin, holding the trigger and hammer roughly in position while the actual pins get driven through, instead of trying to align three moving parts by hand at once. This Geissele Automatics Trigger Fitting Pin earns its place in a builder's toolkit specifically because trigger installs are one of the few AR-15 jobs where alignment matters more than force — a good fitting pin turns a frustrating five-minute fumble into a clean, controlled swap. Key Features: Sized to match standard trigger and hammer pins Assists with trigger removal by pressing pins out cleanly Functions as a slave pin during new trigger installation Simplifies alignment during trigger swaps Compatible with mil-spec AR-15 trigger groups Compact, single-purpose design Reduces risk of marring pins during removal Made in the USA Geissele Trigger install work goes from a two-hand balancing act to a straightforward process once this slave pin is in the mix. Geissele Automatics Geissele Trigger Fitting Pin 02-313