greg Posted December 27, 2009 Report Share Posted December 27, 2009 I've been having a play with my 5-7 & wonder if the firefly cylinder valve is worth getting. Any one have any experience with this? Greg. Link to post Share on other sites
Wingman Posted December 28, 2009 Report Share Posted December 28, 2009 I have two of TM Five Sevens and other than adding a stainless steel outer barrel, I've found this pistol to shoot just fine in the stock mode. It's one of those pistols that just doesnt seem to need anything. While I use green gas every now and then, I've found that I'me getting really good performance with 134A and even Duster (loads of shots from a gas fill and about 250 fps). My opinion would be to just leave it alone and replace the part if and when the stock one gives out. Link to post Share on other sites
greg Posted December 28, 2009 Author Report Share Posted December 28, 2009 I have two of TM Five Sevens and other than adding a stainless steel outer barrel, I've found this pistol to shoot just fine in the stock mode. It's one of those pistols that just doesnt seem to need anything. While I use green gas every now and then, I've found that I'me getting really good performance with 134A and even Duster (loads of shots from a gas fill and about 250 fps). My opinion would be to just leave it alone and replace the part if and when the stock one gives out. So, you haven't tried it then? Greg. Link to post Share on other sites
Firefly0 Posted December 28, 2009 Report Share Posted December 28, 2009 From what i have heard they don't seal very well, i think you should get a PDI piston head instead. Link to post Share on other sites
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