This started out as a used Gen 3 G20SF which I paid $600 for. It came with about 80 rounds of ammo, and extra LWD barrel and 2 holsters. After I shot the gun, I knew I had to do the Long Slide conversion so I sold the complete factory slide assembly and the extra barrel for $525. So I really only paid about $75 for a Gen 3 G20/21SF frame. I eventually used the Gen 3 frame on a Gen 2 G-21. I did this because I wanted the Gen 2 frame for the G20L project. The first phase was getting the long slide, for that I went with Bobby Carver. He built the slide from the following parts for less the $630: Lone Wolf 10MM Long Slide, Blind Marked Lone Wolf 6.61" Threaded Barrel CARVER Custom 10MM Comp Glock Internal Slide Parts Engraving CARVER Custom SS Guide Rod Assembly Once I received the slide from Bobby I realized that the Bull Nose profile on the front of the slide looked horrible with a comp sitting in front of it. Here is a picture of it: So I had a friend fill in the bull nose with TIG weld and then I machined it square. After I got that staright I ordered a C-More STS scope for $302 shipped. I was a perfect fir for this wider 10mm slide I did really know who I would pay to do the final mods but after a little research I went with Mark at L&M Precision Gun Works. He did all of the following work: Timed the comp to the barrel Machined the sides of the comp to match the barrel Machined the rear of the slide for the C-More STS Scope Ball milled the grove on the top of the slide that goes from the front of the slide and extends into the comp. Machined the top hole to make the ends round instead of square-ish Chamfered the bottom edges of the slide and the comp to make them match Drilled 2 additional holes on the bottom of the slide, one on the comp and one behind the factory front sight hole Machined the top of the barrel to remove the last traces of the LWD logo and then he polished it Cerakoted the slide graphite black Mark was very easy to talk to and I was amazed at the turn around time and price I am extremely happy with it and the pictures do not do it justice. I can not wait to shoot this thing. Unfortunately all of the ranges are closed for Christmas but hopefully I be able to get to one after the first of the year.