I have to say this is probably me putting two things together that I love which, like as not, have absolutely nothing to do with one another. But I couldn't resist posting here to ask FPW himself.
In the fifth book of the Repairman Jack series, Jack gives up his favourite sidearm (the infamous Semmerling) for a gun that his supplier (Abe) thinks is better for him.
In the fifth book of the James Bond series, James gives up his favourite sidearm (the beretta) for a gun that his supplier (M, or Q if you want to be specific) thinks is better for him.
Coincidence, FPW? I know a lot of people, being Bond movie buffs instead of Bond novel buffs, would miss the reference, but it's something I noticed on my most recent re-read.