I own a Ruger MK 1 and we have used it For 20 Years +. We went through many cases of shells instructing our clubs First Time Youth Shooters. It performed flawlessly, has been EXTREMELY accurate, and it has been taken apart and cleaned hundreds of times. BY HAND IN THE FIELD!! I recently purchased a Ruger MK111 for my daughter. WARNING,,, DO NOT PURCHASE A MK111 UNLESS YOU SEE THE DEALER TAKE IT APART AND PUT IT BACK TOGETHER BY HAND!! IT IS IMPOSSIBLE TO TAKE THIS MK111 APART IN THE FIELD WITHOUT A HAMMER!! THE DIRECTIONS SAY TO HIT THE BARREL WITH A PLASTIC/RUBBER HAMMER TO GET IT APART! YOU ALSO NEED TO HIT THE BOLT STOP PIN WITH A WOODEN DOWEL AND HAMMER. WHY ISN'T THERE A HAMMER SOLD WITH THIS PRODUCT??? I HAD TO PUT THE TRIGGER GUARD ON THE EDGE OF A WOODEN WORK BENCH AND HIT THE BARREL 3 TO 4 TIMES WITH A HARD RUBBER HAMMER TO GET THE BARREL OFF!! I Had to HIT THE BARREL MUCH HARDER, TO GET IT BACK IN POSITION FAR ENOUGH, TO GET THE BOLT STOP PIN BACK IN. (I had to hit the pin in with the hammer also) THERE IS NO WAY TO GET A MK111 APART IF YOU MOUNT A SCOPE!! EVEN A SHORT "RED DOT" WOULD STICK OUT PASSED THE BACK OF THE BARREL, MAKING THE BARREL IMPOSSIBLE TO HIT WITH A HAMMER. I SENT THIS RUGER MK111 BACK TO THE FACTORY FOR REPAIR OR REPLACEMENT. IT CAME BACK IN THE SAME CONDITION. WE CANNOT GET THE BARREL OFF WITH OUT A HAMMER. EVIDENTLY "FIT AND FINNISH" AT RUGER IS NO MORE! WELL WHAT SHOULD I DO,,, SELL IT TO ANOTHER SUCKER WHO WOULD NOT BE ABLE TO GET IT APART AT THE RANGE, WITHOUT A HAMMER?