I am selling a NIB Sheridan Engineering Slotted Ammunition Gauge in 9mm x 19. I received two of these for Christmas and Sheridan has a very heavy restocking fee for returns.
Sheridan gauges are machined to SAMMI minimum chamber specs, so you can use the gauge for a plunk test rather than disassembling your pistol. Here is a link to their website:
https://sheridanengineering.com/product/9mm-ammunition-gauge/$42 plus $8 shipping, check, MO, or PayPal.