Ultrasonic cleaning MPX

[Nitro1]

I am looking to use a ultrasonic to clean my MPX. My question is does anyone know if there are any MPX parts that would not be safe in the ultrasonic cleaner? I am primarily worried about the BCG and the tappet and piston along with the o-rings on those parts. I am keeping this question broad to get good conversation going.  

 

Thanks. 

Edited February 12, 2019 by Nitro1

[alanm]

My brother ultrasonic cleans everything on his MPX minus stock and forearm. No problems at all. He cleans it that way after every weekend of competition. He has the heated ultrasonic cleaner. 

[alanm]

Oh, and he takes everything apart. He doesn’t throw it in there without complete disassembly. 

[Nitro1]

Thanks for the info. I figured it was all safe to US but I was not sure.  

[Nitro1]

What do you think of putting the upper receiver in an ultrasonic? I am only worried about the finishing really.  Figure it will make my life much easier to just drop it in the US and walk away. 

 

Thanks

[Smithcity]

34 minutes ago, Nitro1 said:

What do you think of putting the upper receiver in an ultrasonic? I am only worried about the finishing really.  Figure it will make my life much easier to just drop it in the US and walk away. 

 

Thanks

Done that a dozen plus times, not a problem. Just dont run it more than 3minish