Frame Name
 
 
SRTS Order Code
 
 Inserts 
MCU-2P
 
 Not authorized as a gas mask insert any longer.
Authorization is only for Navy training and Army "jumpers"

 
 
 
 
 
MC

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M-40
 
Authorized for Army personnel only.
 
 

 

 
 
 
 
M40

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MSOI
 
 
Replacement for the MCU-2P.
Offered with small, medium or large mounting frame.
Used for Navy personnel only.
      
 
 
 
 
 
 
MSOI

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M-50
 
 
Used for the M-50 or M-53 gas masks.
Currently authorized for Air Force and Marine Corps personnel. Being deployed at this time to Navy and Army units.
       
 
 
 
 
M50

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M-45
 
 
Specialty insert that is not widely used.
 
 
 
 
  
 
 

  

M45

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EAB-17

 Used for Navy Submariners only

 

 

EAB17

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Although all of these inserts are currently available, the M-50 insert will be the standard in the near future. ​ ​