The 620 isnt being made anymore because of the enjoyment of gun owners having a great time with the 686+ which is a 7 shot or the just plain 6 shot. The 686+ is made in 4 different barrels. 2.5,3,4, and 6 inch barrels. I have the first 3 of them for about 8 years now along with my M10s. The 620 had a 2 piece barrel on it along with the IL lock. The same lock that I have on my 686+s that I own and carry and shoot. I havent had so far any problems with the lock because,I leave it unlocked. CCW carry holster that I have for them is an iwb Uncle Mikes for the 4 inch with velcro strap on it and it fits well and is comfortable. But,,,,,,,, because S&W pricings on revolvers have shot thru the roof, I will and have been buying rugers and used smiths when I can find them. So if you decide,here is my own opinion of them. I,right now would stay with the Ruger GP100 if you want a new one. If you want a S&W, find a good used one that isnt priced out of line like. rz625-8