This part is for the JG M4 RIS Airsoft AEG w/ Hurricane Type Crane Stock (AEG-JG-6624-L), though it might fit your stock as well.
Quite the niche part, but many of the reviews on Evike have said their stock's butt tabs had broken off and were useless. Included are 2 parts, one deep for longer/nunchuck style batteries (20mm deep, 24mm overall thickness), and one with a thinner profile (6mm deep, 10mm overall thickness) to not waste space or print time.
I've not printed or tested the 20mm deep version as I no longer use the massive stock batteries. Print 20mm deep at your own risk. (Though I'm sure it'd be fine, if not, leave a comment)
!!! IMPORTANT !!!
This part must be printed in an upright position, I've included an image to better describe the proper orientation. If printed in the orientation that makes sense, the tabs break super easily because of layer lines.
The author hasn't provided the model origin yet.