I have owned several of each model, and have found both to be very reliable guns, with the SX1 probably being the most reliable semi-automatic I have ever used. The M-50 is one of the softest recoiling guns of any type that I have seen, and except for its odd balance, Would make one of the best target guns around. There was a lightweight version of the M-50 with an aluminum receiver that is even more oddly balanced. I have never owned or used one of the M-59s, which was the lightweight version with a fiberglass barrel, because they felt so butt heavy. The SX1 is probably too heavy to make a good upland gun, but that is part of what makes it such a fine target gun. Be careful to inspect the movable chamber of any prospective M 50 since I have seen some with chambers badly pitted on the outside of the neck ares. I would expect that pitting to cause reliability problems.
Last edited by Tom Martin; 10/23/11 11:18 PM. Reason: spelling correction
