I have a slightly used Sig Sauer p320 full sized caliber xchange kit with 2 magazines in 357 Sig.  I will include a medium replacement grip module and Sig holster with it. These sell for 400-429 at Sig with one mag!  Price includes shipping tyd.  Note, this does not include the FCU!  This is not an operable firearm, but works perfectly once the fire control unit is installed.

I take Venmo or PayPal.