Version 2.0: an updated version of the push knife, this version has a wider blade, sturdier construction, finger grooves(currently too small) and a beam through the blade to prevent breaking during (for prop purposes) use.
Version 3.0: an updated version of the push knife V.2, this version has a second intersecting flathead arrowhead to form a broadhead arrowhead along with updated finger grooves that are more roomy, this version is not as compact or concealable, but offers a cooler look and more ergonomic grip. The support cross beam from V2 is unchanged.
Note: I have not tried printing these without a raft, a .3mm raft seems to be perfect for the V1 and V2, I have not printed the V3 yet.
Again these are PROPS and, while they are of sturdy design, should be used accordingly.