About two years ago, I walked into a local small bait shop/grill/gun shop (great combo, huh?) and saw a pretty clean XP 100 in 221 Fireball. He was asking $175 for the gun, which was clean with but a bit of freckling on the bolt and bolt knob, complete with a Weaver base installed. He let me take it out back and pop one off to "see if it worked" then threw in the rest of the box Remington .221 with the deal. I put a nicer base and rings and a Weaver 1 - 4 X 20mm pistol scope on it and it shoots great. (LOUD
) Nicest thing was the gun dates to the first year of production, 1963. I'm glad I picked it up, even though I sure wasn't looking for one