I have a Wolf conversion barrel for a Glock model 22 in Sig .357 Caliber. This allows you to change calibers from S&W .40 to Sig .357 by just switching out the barrel of you Glock 22. Everything else the slide and magazines is the same. It is like having a second Glock for less than $100. I bought it a month ago for $100.00 by mistake thinking it would also fit my Glock 23 and just stick out the end of the slide. (I was wrong It does not fit the Glock 23.) The seller did not misrepresent it in any way, I just didn't do my homework or ask before buying it. I have since bought the correct conversion barrel for my Glock 23 and have no use for this one. My loss is your gain. First $80.00 takes it. If you want a picture PM your email address as I can't seem to get my pictures to upload to this website. Thanks for looking.