This is a TALON Grips Inc Grip known as the Rubber, model 001R.
TALON Grips for Sig Sauer P250 and P320 9mm/.357/.40./45 Compact with the medium module. This rear wrap grip is in rubber texture and offers full side panel coverage including the thumb rest area" full coverage under the trigger guard" and high coverage on the backstrap. This grip has a graphic cutout for the Sig Sauer emblem.
Features:
Black finish
Durable single piece firearm specific design provides maximum coverage
Proprietary material is less than 0.5mm thick
