What is the "Blue Line" Sig Pro?

The "Blue Line" Sig Pro is a special line designed for law enforcement that includes three full-capacity magazines and only one grip insert (the thinner/smaller/stippled one). SIGLITE night sights also seem to be common among "Blue Line" Sig Pros. The Sig Pro pistol itself is identical to civilian Sig Pros except for a "Blue Line" crest on the top of the slide, between the rear sight and ejection port, like in the photo below:

Non-LE individuals can purchase and use "Blue Line" Sig Pros. Prior to 09/14/2004, it was common practice for dealers to replace the three LE magazines with (at the time) legal 10-round magazines. However, this is no longer necessary because full-capacity magazines can now be purchased, regardless of any markings that would suggest otherwise. Please check with local and state laws to make sure that you are not in a jurisdiction that has its own ban on full-capacity magazines.

The product codes—as indicated on the sticker attached to the outside of the case—are different that standard Sig Pros, as follows: