Posted here a few days ago about my inhereted P226.Upon closer examination the numbers on the slide and frame do not match.The pistol came in a blue plastic sigarms box,the label on box says "used".Slide ser#U379792 frame#U550257.What gives?Can someone please enlighten a newby.I know my friend ordered the piece online and sent to a local FFL for transfer.Under what circumstances would this happen,outside the military of course.Thanks for any info.

Sounds like a “frankensig”.
Sig put a few together out of spare parts, or refurbished guns sent in for repair with parts with different detail numbers.
Not unheard of at all.
How does it shoot?

Shoots great,the barrel numbers match the frame.This is my first SIG,wont be the last.

might have been one of the SIG's CPO guns, which started out as a great deal for getting lightly used LEO trade in guns that's been refurbished and refinished to new, but eventually SIG started assembling guns out of used parts, often from mismatched parts which they tried to mill off the original serial number to hide the fact.

Yours sound like an example that was assembled before they started this practice (or maybe after they stopped doing it?)

Well it is no collectors piece but it is reliable and accurate.Thanks for the info.

I have a 228 that had a rail get damaged replaced the frame with an AL serial number as opposed to a B 228 number. It was sent to sig. Frame was probably a 229.

This message has been edited. Last edited by: spunk639,

Years back had the frame SPLIT on an HK Tactical.

Sent it back and ended up with a MISmatched gun.

Maybe your s suffered something similar?

I bought a P225 awhile back and the frame and slide s/n matched but barrel was different. All I could think of was maybe the owner had two and put the wrong barrel in.

I had a red box cpo that had different serial numbers on the slide and frame. Sig does all kinds of crazy things from time to time but the pistols work like a fine watch.

It's not unheard of for police departments to do this as well.
For instance, if the armorer was replacing the sights on a pistol and gacked up the dovetail, he might grab a slide off another from the armory that was red tagged for a frame issue and send the officer out to qualify with it - fully intending to put everything back together someday, Only someday never comes.

I have a S&W 6906 that's an early model with the square trigger guard, but is sporting a later model 6906 slide with the larger sights. You can tell that the slide isn't original, because the machining doesn't quite line up. However, that's how it was issued to me and I bought it when we transitioned to Sig 229r's years later.

quote:

The pistol came in a blue plastic sigarms box,the label on box says "used".Slide ser#U379792 frame#U550257

Does the Part Number label start with "UD"? If so, it's a factory refurbished CPO. Not at all unusual.

The part number label does start with UD it says UD226-9-B1 Sigarms,226,9mm,used.

^^^ For sure that's a CPO.
"UD" is SIG factory code for CPO. Typically, CPOs come in the red plastic box, but it can be any other boxes. In your case, it's the blue plastic one.

We had a 'UD' marked P229 transferred in through our shop a couple of weeks back. Also in a blue box similar to what SIG used for civilian commercial guns a decade or so ago. Definitely a used gun that had been cleaned up, presumably by SIG.

things happen at gunshops too,


had an instance in one shop I know of where the tactical teds behind the counter had a handful of pistols apart and got the slides and frames mixed up,

and sold a couple that were mixed,


the idjits did not seem to realize the big parts were numbered, and matched, when they took them apart

My CPO 228 is a FrankenSIG too.
Slide is marked KA -(1990), but the frame SN range is from '97/'98.

Rollmarks are different and the slide has when can best be described as a parkerized finished.

Old pic...

The CPO 226 I bought 15 years ago is a mismatch. Came in a blue box, gun works just fine.

I seem to recall that when SIG initially started the CPO program, it was mentioned that the red box CPO pistols were supposedly the better pistols compared to those that came in the blue boxes.
This may simply have referred to the overall cosmetic condition which may have included matching numbers vs non matching.
My red boxed CPOs purchased back then all have matching numbers (frame, slide, barrel).

I used to be a SIG and Glock LE armorer and I want to say in the SIG course you took all the instruction guns apart and put everything into piles and you took random parts to make your class gun. They may have had us keep, frame, and slide together, but there were always a share of idiots in the class who screwed things up. And I'm sure different instructors, armorers, and users mix things up before the guns were excessed. I'm aware of one guy who broke his slide and replaced it hoping no one would notice.

In the Glock course we used our own guns, and if they found any problems they just gave you new parts. Also the Glock course they fed us and the SIG course they didn't.