I found this group shot of a few of the rifles. Some were always on display at my FFL's shop....so never together. I also have to dig thru my old 35mm pictures. I have a picture of one of my safes, with 5, 550's and 3, 551's in it. I had the SIGness.
below L to R.... 510-4, AMT, PE90, 551, FSA/540, CSA/542
View attachment 427
Wonderful representation of classic SIG's.