According to the Crosman web site the 1600 was made from 1979 to 1990. It is modeled after the Colt Woodsman. It appears that the 454 pistol made from 1978 to 1982 is the same pistol but unlike the 1600 the 454 has an adjustable rear sight.
The spring loaded magazine will hold 16 or 17 BBs and will empty the magazine as fast as you can pull the trigger. With a velocity of 350 fps and 80 shots per cartridge this pistol is a soda can killer.
The seal for the CO2 cartridge is worn out and leaking, luckily Crosman still stocks this seal and I have a replacement on its way.
I was able to slow down the leak by pulling the worn out seal and flipping it over. I managed to empty a magazine full of BBs before the seal started leaking again.
This shot group is encouraging, about half of the 16 BBs went int a nice small group. I was shooting at 5 yards, off hand.
Once I get it sealed up I'll find out if this group was a fluke or if this pistol is as accurate as it appears to be.
