Another one of my more obscure rimfires. Ar7 Explorer II pistol. Offered by Charter Arms for a limited time in the 1980's, it is the pistol version of the Ar7 rifle.
Came with two barrels, a 4" & 6" and two magazines. One mag fits in the grip.
Ramline made some 25 round mags for the Ar7s which worked most of the time until the plastic feed lips wore out. Now they don't work most of the time.
I bought a full length Ar7 bbl off of ebay back in the day and cut it down/threaded it at 10". I had to cut another notch in the receiver to make it fit as the rifle and pistols couldn't share barrels to prevent the pistol bbls from being put on the rifle. Rifle barrel on a pistol is okay though. Turned it into a crew served weapon.
While it was mostly reliable with factory mags, it largely depended on the mag you fed it with. The mags had a built in feed ramp, some worked, some didn't. It was fairly accurate as well. I had a side mounted scope mount for my Ar7 and could put a pistol scope on the pistol. Kind of a poor mans Charger take down.
It was big and awkward to carry and nobody made holsters for it. Subsequently I cut a slot in the back of the grip to carry it with a strap. I bought a couple of them on clearance after they stopped making them for less than $100/ea and gave one to my brother.