Geissele triggers (non MPX) do work in the MPX, but they will not go the distance. Bolt carriage velocity during recoil is too high. Hence, SIG used a bridge over the disconnector on some MPX triggers to prevent distruction of the disconnector.

Several brands spec a different, non AR 15 trigger, for the MPX.

Bill

 

The Hiperfire PDI was designed for the MPX. It’s very robust and works really well with either the MPX or MCX.

I have an extra Hiperfire PDI and Eclipse i can sell if you’re interested.

 

Thanks, buy don't the hiperfires have an extremely low trigger pull (like 2#'s)?

 

If I were you I'd strongly consider the TriggerTech MPX specific package. I have no experience with Hiperfire's version, but the TriggerTech can be adjusted from 3.5# to 6# with a simple allen key.Break is crisp and reset very short. You also have the option of purchasing it with a traditional curved or straight trigger.

It really boils down to your intended purpose. 3-Gun or competition = Hiperfire, Home Defense I would go with TriggerTech.

 

X2..if anything like mcx-specific it’s very good..have it on my rattler and virtus

 

Sounds like a great trigger, but I generally prefer a single stage. However, after reading Triggertechs description of their MPX (two stage), It sounds like you get more of a
single stage feel. Any thoughts or feedback on that?

 

1st stage barely noticeable..super crisp break..