Ryobi 18v Toolholder with retaining clip. Suitable for most Ryobi 18V handheld tools. 

Parts can be printed in place if using the same colour.

Minimal support needed under the clip and under the housing area where the clip assembles. You may be able to get away with the latter. If printed in place, support only needed under the clip.

Printed in PETG, 0.2mm layer height. Your choice of infill. Other materials such as PLA also should be fine.

Features designed in for a cap head screw and nut to strengthen the battery post if required, but I haven't needed to use it, even for a heavier brad nail gun.