Two affordable grips in stock rt now. One with a compartment (BCM), one very lightweight without a compartment (MFT).

Both are really very comfortable and... no finger grooves! I hate finger grooves.

https://www.opticsplanet.com/bcm-gfgmod-3-blk-pistol-grip-mod-3.html

https://www.midwayusa.com/product/1018123059