Hell even some of the "Saturday night specials" out there could be considered IED's!!!! IMO. I even saw a guy bring a 1960's vintage RIG 22 revolver to a gun shop to sell the other day,,LOL !!!! Talk about a time bomb!!
I kinda feel the same way about Hi Points and the other plastic framed and "pot metal" stuff out there,, ya ya I know,,,, a firestorm about this will ensue. I just don't like or trust plastic or pot metal guns,,, period. And improvised,,,,,OMG,,,,,to scarey to even think about unless you got "real gun parts" and knowledge to use them! Don't think I'd be making something out of a piece of water pipe any time soon,,, I prefer my body parts right where they are,, even though most don't work anymore
Hell,, It took years before I even trusted aluminum frame guns,, so give me a break. And Plastic and pot metal guns may be fine,,, but just not for me.
This topic brings to mind a story I saw years ago on u-boob, or some place like that, with a guy doing a AK build,,,
It might's just as well have been "improvised",,,, He beat this poor thing apart and back together with a 3 lb hammer,,,, literally!!! Head spaced it by putting in a empty case and driving in the barrel till the bolt wouldn't close , then "bumped it back out a bit",, with a huge punch,,,,(made out of a 3/4" shoulder bolt off a lawn mower) ,,,,,,,,OMG!!!!!! He also used a cement pad for a back up dolly to park the trunnion on,, with a piece of carpet,, "to keep from damaging anything" ,,and of course a 29 caliber galvanized framing nail stuffed in the end of the barrel to keep from buggering the barrel up,,,,


then he commenced to beat this poor barrel into submission into an obviously undersized trunnion or over sized barrel !!!!

NOT PRETTY!
Wait,, it only gets better,,,,,Held together all with aluminum Pop rivets, YES TRUNNIONS TOO!,,, sheet metal screws,, not even good ones, and what to hell ever else was handy in the shed. A nail for a trigger pin,,,, no pin for the barrel so they spot welded it in place with a stick welder,,,,,painted with Krylon,,,, Very Classy,,,,True craftsmanship,,,

Long story short ,,,IT WAS A THING OF BEAUTY!!!!
Surprisingly ,,In the 2nd video it sorta worked,, fired,, but barley functioned,,, FTF ,,,,FTE,, jams,,,ect. At the end of the video there was a picture of the gun sitting on an old wire spool shooting bench,,, you could see where the rivets had been sliding around on the receiver and in the slow motion clip you could see the gun visibly "hunch up" in the middle,, with the recoil spring cover popping off a couple times!!! Looked like the front and rear trunnions were BOTH loose. I know there is some movement in AK platforms,, but that thing was ,,UNREAL!!!! The front trunnion must have moved an inch at the muzzle end and quite a bit more on the rear trunnion end when they fired it. OMG!! I flinched every time they fired it ,,,,, expecting the worst !!!!
I'd seen this quite awhile ago and can't find it again for the life of me,, It was really something to watch,,But from what I saw,,,,,,,,,,,
I'm sure by now there a statistic !
When I was looking for that video, I ran into a couple others that test fried some of the "zip guns" police had impounded. Some worked,,, some just blew all to Hell!! This one particular,,,12 ga one I saw,,, especially so!! A classic cartoon curled up flower pedal looking barrel!! Both ends!!!

Found one video with a "real gun" doing that too, a hunting rifle some guy was taking a shot on some game with from a ledge, looked a bit like in Montana . Kinda looked like a stainless Browning, but not sure,, they didn't really say what kind. So I guess nothing is infallible.
Check out test firing zip guns on a general google type search and it will scare ya what you'll see !!! 50 cal round shot in a single shot shot gun,,,,, ARE THESE PEOPLE NUTS??? OMG !!! At least they had enough sense to hook it down to a plank and use a VERY LONG string to touch it off with !
Kinda makes ya wonder if something used like that, might be found at the next local fun show ??