https://www.dictionary.com/browse/modding Nothing to do with modding subs. Anything to do with modifying something into something different and/or new. Please keep it legal is all I ask (within reason at least). 2nd Amendment type stuff as an example - gray area since the government and citizens conflict heavily alone at times. Not here to tell you how to live your lives either though. ----- Edit: Adding in (even though DIYGUNs is around) - someone might post there to as well. Modified weapons - not persay "DIYGUNS" More clear example? 1. AK47 (my modified version) https://tube.poal.co/watch?v=_eQLFVpOYm4 Modifying the clip / chamber / barrel and such to be able to shoot .50 cal rounds fully automatic if not in single shot just fine. 2. Recoil Reducer - this does it 90% for a .50 cal BMG http://bulletin.accurateshooter.com/2013/01/taming-the-beast-mcmillans-hydraulic-50-bmg-recoil-reducer/ Build in 4-8 (smaller) ones on the left and right side of the AK47 - going up the weapon on the right and left side. Could do metal plates on both sides to as well for protection. The metal plates go 2 inches above the weapon. 3. Then add in lightweight kevlar type stuff to go around the plates on both sides that come up 2 inches which helps in covering the face and/or etc. So you have face protection from the hydraulic system / spring system on both sides of the weapon. The armor is incorporated into and/or within the hydraulic system to as well to help protect the face when they are looking down sights. The hydrualic system which is 5 inches high in total and extends out as it gets nearer and/or closer to the face helping to give body armor cover for the face while the hydraulic system inside reduces the recoil by 95%-99% while the AK-47 shoots .50 cal rounds. Something more or so simple for now and that's if someone could do this to as well, but like heavily modded firearms and/or weapons. It's fine to post and say why aren't they legal and such and/or discuss them, but I'm talking about working real world models more or so for now and posting pics. I need to figure out the rules here better to as well with time. Something over the top for now at least to give a more accurate / true / better idea of it all.