Gunstruction is working on version 5.0 as you read this. The biggest news that will likely come out f that new version will be the inclusion of the AK family of rifles. Version 5.0 will feature AKMs, AK74s, M70s, M92s, Veprs (RPKs), and milled AKs with a variety of chamberings at launch along with AK specific products from manufacturers like ALG Defense, Magpul, RS Regulate, and more.
That is actually pretty cool. The AK market hasn’t softened like the AR, so this makes good sense.