I got my MKII in a trade in 1995. Serial says 1986. It always shoots better than I can. I hand it to other, usually younger, shooters at the range, and they all shoot 1" or so groups at 25 yards. Any 22LR ammo I've bought for the past nearly 40 years seems to shoot the same in it. I've shot Mk III's and IV's, and they are not the same.

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Heavily armed old man.