Rossi RS22 Wombat

This is not a firearm.  This model is merely a replacement stock / dress-up kit.  It does not and cannot fire bullets without a legally-acquired barreled action / receiver.

This is a remix of a stock originally designed by Kevin Jasionowski.  I modified the pistol grip to be much more comfortable, changed the mag release so it works reliably, and replaced the fake-buffer-tube stock with a picatinny rail and a modified version of Mussy's folding stock.  I also made an optional M-Lok/rail combo version of the handguard.  If you plan to use an optic, I definitely recommend a riser.  I've included a model for a simple one I found on thingiverse by haphazardlynamed that works perfectly with my cheapo red dot and matches the style of the rifle.

The mag release is still a bit janky and could do with some improvement, but it does function more reliably in its current configuration than the original.  Rotate the lever down to insert a magazine.  Rotate it ~90 degrees towards you to release the mag.  It takes a bit of effort, but it does work.  The mag release cannot rotate up without a mag inserted.

Print the two body halves laying flat and the handguard standing up.  A 300x300 or greater build plate is required.  I used normal supports on buildplate only for the body, stock, and stock button.  Tree supports for the hinge and mag release.  ABS is highly recommended for the mag release, and you will need to print it slow with 100% infill.  

You will need a bunch of M2 hardware to assemble the shell - I didn't really keep track of what specific sizes I pulled out of the bolt bin.  The handguard bolts are M3.  You'll need a M4x25 bolt and nut for the stock mount, and a couple of M3 bolts to attach the hinge to the stock itself.  For the hinge button, I used a couple short pieces of silicone tubing in place of a spring, and a finishing nail as a button retainer.

Unless you have very short arms, I recommend using the “thicc” butt pad version.  Print it in TPU (if you can) with low infill for best results - not that a 22 has a ton or recoil that needs absorbing or anything. 

The original file included no licensing info, so I'm assuming it's PD / copyleft / free-use / whatever.  Do whatever you want with this.