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I too have been intersted in the model 1 sales 300 fireball. I emailed them regarding gas port location, it is in the carbine position. I also asked them if they would build one with it in the pistol position but got no reply. What I am understanding from this thread though is that a couple of people have been able to make the M1S carbine relaible with 220 grain subsonic by only drilling out the gas port to a larger size. I haven't read anything that says this will mot work. Is there something I am missing?
I am also considering having something built but there is a significant cost difference that I am sure will be apparent in the quality of the two but the M1S is an attractibe low cost was to start shooting this round.
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