Marlin M45 carbine. Bought one when they first came out, put a folding RamLine stock on it and an under-barrel Mag Lite. Shot 15 rounds thru it in the first year. Yep, 15. The polymer trigger block wouldn't stay together and would crack after the 3rd or 4th shot. Did it three times. Marlin replaced the assembly each time, with me paying shipping. After I got it together the last time, I fired two rounds thru it to be sure it was together right and immediately sold it. I wouldn't have another if they were giving them away.