Inland Mfg M1 Carbine. Jam o matic!!! Sent back twice. Still a piece of crap jam o matic. You tube videos show the same results. Wasted $1,049.00.
What gun have you purchased that has garnered the most regret.
Bersa Thunder .380. It was ok for about 200-300 rounds (whatever their official "break in" period was) and then started jamming almost every other mag. Then the trigger went from a relatively normal DA to a 30+ pound DA. It took more than considerable effort to just thumb cock the gun.
After 3 trips back to their authorized repair center (and 3-4 months to do it) the gun still couldn't make it through a box of ammo. Sold it at a pretty considerable loss and was happy to see it go.