>>10917313Okay spoon feed time. You can soundproof a small container for when you're building it. Think like a bucket full of a bunch of shit like insulation buried in the ground you shot into. The cartel uses this method all the time.
As for practice you just need to find a secluded enough place. With a slamfire shotgun it's nothing more than a few pieces of pipe. Something that's completely legal when disassembled.
So you go out of the city limit to somewhere nobody will see you, blast whatever shells you have on you at the time and then leave with the pipes in your bag that if you really need to ditch you can put in a trash can and nobody will think anything of it.
As for a homemade firearm look into truly soundproofing a room and making a home range. A closet can be converted for a very short range with the assistance of a container of water like a fish tank.
Have fun anon but remember this is all satire.
>>10917323I really want to see that. Show it. Do it. POST IT.