Card Sleeve Reference . The following list is intended to assist in what has become a common question on most games forums what card size? This wiki page was based on an original Geeklist by NorDier, as listed below in sources.A caliber conversion sleeve or adapter sleeve is a device which can be used to nonpermanently alter a firearm to allow it to fire a different cartridge than the one it was originally designed to fire. The different cartridge must be smaller in some dimensions than the original design cartridge. Alternative names sometimes imply the type of dimensional difference.
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