to expand on horseman, the guns remington produced were by and large garbage. stripped screws, barrels with sights at the 11 or 1 o'clock positions, poor wood to metal and metal to metal fit, poorly finished internals, dings and scratches on the metal from assembly, it was a mess. They stopped production, the demand for actual marlin made marlins skyrocketed and prices doubled and tripled.
The marlin made marlins have JM stamped on the back of the barrel on the drivers side. The remingtons have REP in an oval on the rear passenger side. Ironically though, the remingtons shipped with better wood. It wasn't finished as well, but by and large it was a higher grade of wood with more figure.