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Raymondo · February 19th, 2006, 22:11

HFC 134 is what the USP Compact is designed to run in stock configuration. it is a much lower pressure gas than propane.

If your gun is leaking on HFC 134, then you definitely need to have a look at the valves on your mags.

February 19th, 2006, 22:11	#4
Raymondo Trader rating Join Date: Oct 2003 Location: Calgary Alberta	HFC 134 is what the USP Compact is designed to run in stock configuration. it is a much lower pressure gas than propane. If your gun is leaking on HFC 134, then you definitely need to have a look at the valves on your mags.