Huma air has caliber change kits i think for about 80 bucks plus shipping which i think is pretty steep but that kit a probe and liner would change it to what caliber you want for under 300 i thinkThank you for posting this, so it’s literally just the different barrel liners they use for everything else? How much did it cost to change barrel length from 700 to 600? Looks like a caliber change of same length would be $400 + mags. Sorry I’m pretty unfamiliar with FX rifles.
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