WC has offered the flatwire springs since 2014.

 

My 2018 5” .45 CQB and my 2017 Commander 9mm CQB both have round wire recoil springs and I kind of prefer them in Commander and 5” guns. I do need to change springs more often than my 4” Wilson’s with flat wire springs. I don’t think there is a great deal of difference between the two other than the lifespan of the spring. Guess I just like the original round wire design and GI guide rod in those guns. Round count of those two guns together is almost 40,000 so it seems the round wires work fine for me.

Some people prefer flat wires, some don’t. It is hard to say if your CQB was made with the flat wire or someone “upgraded” to the flat wire system. Wilson sells both and if you prefer the round wire it would be fairly easy to order the parts from Wilson and go to the round wire.

Perhaps a call to Wilson with your serial number could get the info on how it was when shipped out.

 

Great info, thanks. And I really dont have the trigger time to know if there is any difference. I only care about reliability across the broadest loads possible. If the flat wire = longer service time, so much the better.

 

My CQB in .45 was built in 2012 - 2013 (it took about 1 year to build it) and has the flat-wire recoil spring; it was ordered with that in 2012. Like David said, call Wilson to find out how it was originally configured.

 

I’ve read Wilson’s flat wires will last 10,000-40,000 rounds. Not too sure I buy the 40,000 and have never let mine go beyond 6,000 or so without changing (they did still seem to be functioning fine). I typically change out my round wires about 2,000-2,500 but I’m also not shooting full power loads at the range often. Always thought recoil springs were disposabl, pretty inexpensive and easy to swap

 

Just an FYI tidbit fun fact on round vs flat wire recoil springs. (Some here may know) The FWRS uses a smaller diameter guide rod compared to the RWRS.
I discovered this when I converted my CQBE. At the time, I wasn’t converting it for the spring but to fill the open hole below the muzzle in the pistol which has a Bull barrel. Not a big deal, but it just requires a few extra parts.

 

Wilson builds some fine pistols. The parts the offer are top shelf. I prefer Flatwire springs. I don't know if I'm unusual (Probably So) I can tell the difference in how the gun performs under recoil. Its smoother to me. The added longevity is a factor. I would really like to see a 40k round flat wire noting how the gun was performing requiring the change. Maybe one day in the distant future. Give Wilson a call as David suggested. They will guide you (See what I did) to a proper decision.

 

You most likely are able to feel the difference. The flat wire recoil springs don’t stack while compressing like a round wire spring and a 17# flat wire does not feel the same as a 17# round wire.