UPDATE 12/21/23
criterion looked at my pics and are sending a new barrel. i keep trying to get the blob out and that thing is being tenacious,, i recently poured boretech eliminator thru the muzzle so i flowed over copper and down gas hole and let it sit for a couple days, got some blue stuff out but blob is still there.
new criterion barrel, 16" rifle length gas tube, about 50 rds thru it. i had just cleaned and rechecked with borescope and found this blob on the exit side. is this somewhat normal?
i will remove with some boretech or similiar copper remover but it seems to shoot ok.
just wondering. these are 2 seperate pics
criterion looked at my pics and are sending a new barrel. i keep trying to get the blob out and that thing is being tenacious,, i recently poured boretech eliminator thru the muzzle so i flowed over copper and down gas hole and let it sit for a couple days, got some blue stuff out but blob is still there.
new criterion barrel, 16" rifle length gas tube, about 50 rds thru it. i had just cleaned and rechecked with borescope and found this blob on the exit side. is this somewhat normal?
i will remove with some boretech or similiar copper remover but it seems to shoot ok.
just wondering. these are 2 seperate pics
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