Springfield M2
Built by the Springfield Armory in the 20's and 30's for training purposes. It simulated the weight of the 30 caliber rifle, while consuming the much cheaper .22 ammunition. To keep the weight in line, Springfield used a 30 caliber barrel, underbored to .22, and in the process accidentally created an extremely accurate rifle.
I got this one partially out of sentimental attachment. I was shooting my father's M2 at the age of 13 - when I was younger, I couldn't hold it up. M2's have become quite expensive in the last few years, with pristine examples bringing upwards of $1,000 these days. I got this one much cheaper ($500) because the stock had been refinished. Or so I thought... read on. Was offered $700 for it before I could get out the door of the gun show, but I bought it to shoot, not to make money on.
This is a later M2, with the small peep sight on the rear. I'd love to find the larger peep sight, as this one doesn't really blank out the background. But, it shoots well, even if the clip doesn't feed correctly.
Update - I have been able to trace the serial number on this particular M2, and it's origins explain the shiny stock which I had previously attributed to an ill advised refinish. This particular rifle began its service life at the US Coast Guard Academy, which tends to explain the shiny finish - put on for the cadets to agonize over.