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Posted: 8/15/2026 1:29:16 PM EDT
[Last Edit: Core][Edited]
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Milspec AR15 Lower Partisan FCG with Extra Power Hammer Spring Spear LT Upper 5.5.6N no FPS Latch/ with PMM Trip The FPS Latch and factory Disruptor hammer spring was causing light strikes. After replacing the hammer spring it is producing the milspec hammer pop on the FRT function check. So given the specs of the AR15 lower work with the Disrupter is there a tolerance issue that will conflict with the Spear LT upper? It's the late model milspec upper with adapter and the newer military weight recoil springs. The Partisan was working in SA mode fine for a while and then the hammer spring just stopped getting the hammer past the FPS Latch. I'm thinking it should run well now if the Disrupter geometry is good with the trip. Any feedback on the gas settings? I have factory valve, seems to be quite well gassed over gassed if anything. A shoutout to the Partisan Disrupter experts here appreciated! |
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