Pre-buy inspections
About two years ago, a good friend bought a new U.S. made P226 and came by for me to show him how to field strip it.
As I slipped the slide off, I sliced my finger clear to the red meat with a sharp sliver of aluminum on the frame rail left from machining.
It is pretty hard for me to imagine anything like that would have made it past the first German guy sweeping the factory floor.
Let alone the German machinists & quality inspectors!
...
That is the key.. pre-buy "inspection"
There are many good, German made frames w/ made in USA slides, Sigs in the older P-series still out there, the older, the better. But inspection for such, as mentioned, is key. IF you don't know how (easy) it is to open a Sig up and inspect it have the gun dealer do it for you on the spot.. watch and learn
Chk for, while gun is still together - slide tightness or play, side to side, up or down and back and front.. You want it "even" front and back as much as possible if limited of selection/s of same model.. Chk trigger pull smoothness in DA mode and chk SA trigger break for clean/lighter, crisp break w/no felt creep (trigger movement prior to break of hammer drop)
With gun still together and slide locked closed, chk muzzle/barrel lock-up for evenness, as you look at it, then tightness by putting the tip of you pinkie finger or index finger into barrel opening and chk for movement by light/pushing up and down and side to side.. should be tight and even. Then if it passes those test and just physical exterior inspection, no scratches, marks, mags pop out freely and go in with no problems, then proceed to have it taken apart and chk interiors as mentioned.. below
Once inside, feel for burrs along frame rail guides and inspect slide with barrel out for same..
IF more than same gun on display - chk both out, be patient, find the best all around gun in your opinion such as:
chk for metal guide rod vs plastic, those can be swapped right there IF you want gun A over gun B..
Sights, some come with 3 dot Sig night sights, nice, but some come with standard 2-dot combat sights, also nice IMO, but those remain on gun at sale, no swapping there. Not gonna happen
And sure, IF they have a Pure, older, German gun there, I wouldn't hesitate long and I'd take it, quick, as they have a lighter, more balanced, less top-heavy, pressed slide and they look a bit different to the same USA made heavier milled SS slides.. but either gun, if chked out and nice, tight, clean, and price is good/right, is a winner.. I have both types.
Few and far in-between of any NIB all German Sigs of late.. but
There ya go, luck
Ls