Sam1911 said:
the legal questions would be moot as on those guns the upper receiver (which stays attached to the barrel during disassembly) is considered the serialized firearm, not the grip frame.
I actually knew that, but had forgotten the details as I observed the similarities to the unit pictured by the OP and the prototype I'd seen elsewhere. I suppose you don't remember the same item?
Sam1911 said:
If by "junk impossible to assemble ruger .22 pistols" you are referring to the very accurate and classic Ruger Mark I/II/III series
Actually, I'm referring to the helpless ninnies who take a simple mechanism like a finely designed Ruger mkIII/II/I and turn it into a pile of what they think is junk, then bring it in in a bag/box to a gunshop looking for sympathy.
Personally, I like the Ruger mk__ series enough that I own two and can't picture owning any other target pistol ... with the exception of yearning for a BuckMark-style carbine version or conversion.
I'm continually amazed by the complaints about takedown and re-assembly on the mk__ guns being "impossible" and "stupid" ... I've often offered to buy the "junk" pieces for $50, one of these days I'll get a taker within a reasonable drive/ride and have at least a parts donor if not another entire pistol.
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Here's a thought for you ATF regulation experts ... so what if I design a replacement upper assembly for a Ruger mkIII that resembles the Mech Tech upper shown in the OP? It would be mechanically similar, using the lower's trigger group and magazine for fire control and a source of ammunition, and using an upper with a captive reciprocating internal bolt rather than a recoiling slide, we'll call the two halves the grip frame / fire control group and the barreled receiver for the sake of argument (OK, I'm lazy, I'm calling them the G/FCG and BR from here on out)
So, why is that BR unit the "gun" on a Ruger autoloading rimfire pistol (MKI/II/III) but not on the carbine conversion for a 1911 frame?
And, if I made something like the 1911 carbine unit as a non-serialized component (Ruger BR with shoulder stock and "legal" length barrel), and attached it to a non-serialized component like a Ruger mkIII's G/FCG ... would I have just made a non-serialized rifle? And since the Ruger mkIII's lower half isn't a firearm according to the ATF's regs, wouldn't I be able to swap parts around all day long, since I can't make a rifle out of a factory BR anyway?
Good thing we have these regulations from the ATF keeping us all safe, I sure hope there's nobody in my neighborhood with a pistol made from a rifle, or a 13" barrel on a rifle, or a shoulder thing that goes up!