SIGforum
When did the MCX stop accepting standard AR triggers

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/630601935/m/6850032194

April 14, 2022, 06:47 PM
bigarms
When did the MCX stop accepting standard AR triggers
Does anyone have the serial number range for MCX’s being able to function reliably with the standard AR trigger?
April 15, 2022, 06:22 PM
nhracecraft
I don't think they ever 'really' did. My understanding is that the MCX is particularly hard on triggers. In fact, everyone offering an MCX specific Triggers does so due to the issues associated with trying to use a std. AR Trigger in one.


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April 16, 2022, 07:51 AM
Lefty Sig
Gen 2 added the firing pin safety which needs a hammer that can hit the FPS lever. There was a different FPS lever that would work with Geissele triggers - the "G" lever.

Sigs hammers work, Geissele's MCX trigger works, and various others do as well. Timney's two-stage DH3, Trigger Tech has an MCX trigger too.

Or you can remove the FPS and use any AR trigger.