Have had a few clones built from parts kits. They are good rifles and can be accurate if set up properly with a good barrel. Biggest drawback was the triggers, most semi auto triggers were rough with lots of creep, PTR may have better triggers now but not sure. They do toss your brass about 30 feet and beat it up a bit but I have reloaded some five or more times with no problems. Some love them and some hate them so I would definitely try one out before buying. There was a member over on militaryfirearm.com that was milling weld on scope rails that are IMHO the only way to go when putting optics on one.
