So thats not as serious as you said earlier, is it.
To a mechanic and someone who isn't "very mechanically inclined" it would pose a very different challenge.
A similar thing to this happened at work recently. A guy bought a new AR-10 pattern rifle (scaled up AR-15 that shoots .308/7.62) and wanted to upgrade a few things. He wanted to put a set of free-floating hand guards on it, add flip-up front and rear sights, and a scope. The folks at the hand guard company, YouTube, and an internet forum, convinced him it was easy as can be....everything bolts right up. Yeah, not so much. I had to bring in several of my AR tools, show him how to take the old barrel nut off, change the gas block to one that would fit under the new hand guard, get him to buy two different tools specific to the new barrel nut, hand guard and jam nut, bring in my torque wrench and torque the barrel nut properly, take his new hand guard home and use my milling machine to cut a slot in the appropriate place to access the new gas block set screws, show him how to index the gas tube through the new barrel nut, show him how to measure for scope bases, etc, etc, etc. It's an "easy" job for somebody that knows what they're doing, and has the tools, but almost impossible for somebody who isn't familiar with them, and hasn't done this sort of thing before....even after watching lots of YouTube videos
In fact, for the same cost as buying the tools (not to mention borrowing several), my buddy could have paid a gunsmith to do the work and had it done in a couple of days, rather than the month it actually took (backordered tool, and one where he ordered the wrong version of a tool).