My son is going to purchase a Ruger MKIV 22/45 Lite, as soon as he can find one locally. He and his fiancé have shot mine and really enjoyed it. It will be his first 22 handgun. Today I went on VOLTQUARSEN's website and purchased a 5.5 inch MKIV 22/45 barrel new and complete with bolt and sights. They have them in the clearance section for $40 with free shipping. Once my Son gets his LITE he will now have basically two MKIV,s. With a push of the release button on the lower he will be able to go from the Lite to the Standard Target 5.5 inch in a matter of seconds. Ruger really has a winner with the MKIV,s design and in the meantime I'll loan him one of my lowers (I have three MKIV 22/45's) and he'll have a 22 to plink with until a LITE becomes available. Two of my lowers also have a Voltquartsen hammer, sear and disconnector so he'll be able to feel the difference between the modified lower and the stock one. Ruger really designed a great gun with the MKIV's.