Stuff and Things INC has introduced new magazine adapters for the Keltec P17, allowing the use of P17 magazines in firearms chambered in .22lr that accept AR pattern magazines, such as the Keltec Su22/16 and CMMG conversions.
Stuff and Things states “This adapter lets you use Keltec P17 magazines in your firearms that are chambered in .22lr and utilize AR pattern magazines, like the Keltec Su22/16, CMMG conversions, etc.”
SOURCE:https://stincusa.com/