jamesavery22 54 Posted February 27, 2011 Report Share Posted February 27, 2011 My IZ109 with 4 ports. Even on setting 1 it will cycle low-recoil 00 and bird shot. Only shells I've ever fired that need setting 2 are Ranger low recoil slugs. If I shortened the barrel to 16" and permanently attached DPH's phantom (so overall barrel length would be a hair over 18") would the ports need resizing? Quote Link to post Share on other sites
Battosaii 99 Posted February 27, 2011 Report Share Posted February 27, 2011 most people dont mess with the gas system if its working fine untill they are under 12.5" Quote Link to post Share on other sites
gremlinx 20 Posted February 28, 2011 Report Share Posted February 28, 2011 I've read that if you go 12.5", no more Walmart rounds. High brass only Quote Link to post Share on other sites
csmw 98 Posted February 28, 2011 Report Share Posted February 28, 2011 I've read that if you go 12.5", no more Walmart rounds. High brass only Not so, If you modify the ports and tune the gun, 12.5 will run low brass all day long. Quote Link to post Share on other sites
Trickey99 10 Posted March 1, 2011 Report Share Posted March 1, 2011 My IZ109 with 4 ports. Even on setting 1 it will cycle low-recoil 00 and bird shot. Only shells I've ever fired that need setting 2 are Ranger low recoil slugs. If I shortened the barrel to 16" and permanently attached DPH's phantom (so overall barrel length would be a hair over 18") would the ports need resizing? That is something that you would find out once its done. Do it then test fire and you will have your answer. I had my barrel chopped and added JTE comp brake to come up w. a total barrel length of 18.2", but since the brake is 4" l only have 14" of solid barrel. My gun that always ran everything started to FTE everything. It had 3 ports so l opened those 3 to 3/32, still didnt run. Polished internals, rails, bolt carrier etc, & it still didnt run. Went back added a 4th @ 5/64, still FTE'd. After adding a 5th port @ 5/64 gun runs like a machine. So l now have a total of 5 ports, 3 @3/32, and 2 @ 5/64. But it has shot everything lve fed it since. Its not over-gassed, & runs perfectly. Its just something that you won't really know the answer to until you do it. Good Luck! Quote Link to post Share on other sites
csmw 98 Posted March 1, 2011 Report Share Posted March 1, 2011 I had a 3-port gun that I chopped to 16" and it wouldn't even extract the spent shell out of the chamber. You might be alright, since you have 4 ports. If not, you can always enlarge them. Quote Link to post Share on other sites
jamesavery22 54 Posted March 1, 2011 Author Report Share Posted March 1, 2011 Was guessing this would be a case by case basis type thing Thanks Quote Link to post Share on other sites
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