Yep I run a UTU 2 (rectangular) and it's surprisingly quiet with the subs. Though using it wet makes it movie quiet... seriously. Either some lube or wire pulling gel mostly gets rid of that first round pop, and doesn't tend to run out or evaporate quickly like water does.
Running it on a G17 in a KPOS Scout chassis gets filthy quick though. After 2-300 rounds my trigger pull feels doubled and starts to get fte/ftf malfunctions, as well as the trigger not resetting. I have to detail strip the pistol to scrub the carbon off trigger components.
HOWEVER the chassis adds to the unreliability even with no suppressor and I have reduced weight springs installed which is likely the issue. I imagine it's designed for factory specs. Also running cheap and nasty ammo adds to the filth.
How about we vote someone in who'll let us import semi auto pistol caliber carbines like MP5s/Scorpions, since they're fulfilling the EXACT same role as a glock in a chassis, and not have to deal with the chassis dramas.
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