The vast majority of FNCs are registered sear guns - the host dies, you replace it. Viable repair/reconstruction that doesn't exist for $1k guns where you can just replace them does in fact exist for higher-end guns - receiver rebuilds and major repairs are something you can find done a lot more regularly on NFA stuff.
That said, stuff wears out, and stuff can often be fixed. It's the economic feasibility of the fix that matters. On irreplaceable items, that feasibility often goes out the window.
Finding ranges to shoot NFA stuff vary from region to region; here not being able to use NFA stuff would leave me scratching my head. They may not like it personally, any more than the Title I semis...but it's 100% kosher. Then again, I left Communist Illinois for a reason. And chances are your local SOT can tell you where you can shoot them - most people who can't find a range or location to shoot haven't asked the right person.
That said, stuff wears out, and stuff can often be fixed. It's the economic feasibility of the fix that matters. On irreplaceable items, that feasibility often goes out the window.
Finding ranges to shoot NFA stuff vary from region to region; here not being able to use NFA stuff would leave me scratching my head. They may not like it personally, any more than the Title I semis...but it's 100% kosher. Then again, I left Communist Illinois for a reason. And chances are your local SOT can tell you where you can shoot them - most people who can't find a range or location to shoot haven't asked the right person.