This is a non-safety fcu, fire bronze Icarus Precision Ace 365 X Macro grip module. Used for 6 months as daily edc. This grip module fits macro length mags, and is a flush fit with a P365 x macro or 365 xl length slide. See link below for full price item/description.

https://www.icarusprecision.com/online-store/A-C-E-365-X-MACRO-p742882599