Old tread ?? I bought a chipmunk about a month ago. Still the same gun ,stilled chipmunk but with the keystone logo. I put a 2 to 7 power scope on it and it will shoot 25yard groups in a ragged whole and 50 yards around 5/8 for me. It does not extract cci and will call tomorrow and ask about that but federals work 100%. I payed 167 bucks for a blue finish. Odd gun but fun to shoot. Add some bench rest bolt lube to the trigger and it will light'n the pull . Keystone does have scope mount for 12 bucks,