Originally Posted by jakeball
Mpx isnt a gas gun though. And without the sleeve is the normal operation. Adding the suppressor sleeve would only increase the pressure.
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But the sig mpx is a gas gun uses a short stroke piston system...
The SIG MPX employs the SIG SAUER® battle-proven gas-operated short stroke piston system for unequaled reliability in the field, even under the most adverse conditions.
Its their modified ar15 piston gun designed for pistol ammo.
If its got holes in the barrel to bleed gas for integral suppression its going to lose velocity regardless of sleeve presence. I would like to see good close up pics of the exposed barrel.
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