Needed one for a boneyard Tippmann I'm working on and couldn't find any. Opened up my working Tippmann and designed this based off the original bucking clips.
First time designing anything 3D, I'm sure centre alignment of notches could be better (kind of winged it).
Have included the Fusion file for any one who knows what their doing, feel free to remix.

Print as low resolution as you can, there are some small details on this.
100% infill
Tested with PLA+