I looked this up and apparently the front has an adjustable bore which is done by a dial. Almost certainly a gimmick but kind of a neat idea. This barrel was made for FSR only but there is also a roundball version.
https://www.kijiji.ca/v-paintball/mi...rel/1649776994
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https://www.kijiji.ca/v-paintball/mi...rel/1649776994
Sent from my Pixel 4a using Tapatalk
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