Picked up a new P225A1 and when the slide is forward in battery there is a “shimmy” forwards and backwards about a 1/32 of a inch or less the slide moves back and forth on the frame. Sort of a front and rearward rattle when shaking it. Is this normal? All my other Sigs the slide does not move forward or rearward and is tight on the frame. Could it be a recoil spring not exerting enough tension backward? Advise please...thanks
Brian87

Is the slide moving independently of the barrel, or are they both moving together? My X5 doesn't rattle, but both my 226 and 229 do to some degree. If the barrel and slide are locked up tight, I wouldn't worry about it.

Barrel and slide stay together.

Unfortunately, IMHO, looser slide/frame fit is not unusual with American made SIGs. My M11-A1 and MK25 didn't have 1/32" play, but were not fit as precisely as my German guns. Most SIG owners now seem to accept this looseness as normal. Function is not impaired, and anyone questioning this looseness will soon be schooled by someone that barrel/slide fit matters, but slide/frame fit doesn't matter much. I have only owned one American made SIG displaying the precise fit that was common with German SIGs, and that is the P210A....

Just checked mine, no slop there whatsoever.

That doesn't sound right to me. Recoil spring too short or hung-up on guide rod?

I’d probably call Sig regarding the movement backwards and forwards.

My P229 and P226 both have a little play left and right between the frame and slide but not backwards and forwards. My other Sigs seem to be tight enough that I don’t notice any real play between the frame and slide.

Sig says everything normal, shimmy is
ok. They said to take it out and shoot
it, then if issues, call them back. So
I will take it out and see if I can ascertain
any problems. The rattle however drives me
nuts. Hard to believe its within tolerance.

Did you ever get any more info on this? I have this same issue on a 1989 W. German P226. Very slight movement back and forth while locked up. Appears that the slide and barrel stayed locked while they move forward and back just a small amount. Trying to figure out what could be causing this? Maybe the locking block is not fully engaging the barrel lug? It’s weird because I would think the recoil spring tension would force the slide as far forward as possible. Kind of stumped. It does shoot fine though, so maybe it doesn’t really matter.

have not got a clue about your P225 but back in 2018 I was taking a 4 day class for the 4th time and my buddy and I went to the range gun smith to see about him getting better sights for his Glock and I asked about my Sig P320compact and the smith with a big Glock tattoo on his arm proceeded to show me why my P320 would never be accurate because the slide wiggled..... the next day we shot for qualification and my buddy did not pass... here is my scored target with the 'inaccurate' Sig P320c: