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AR15.COM
4/22/2026 12:04:05 AM EDT
I have a W. German P228 and I found someone selling a P228 slide (not sure what model or if it's W German or US made) that I was thinking of buying and and having a slide cut to mount a optic on. Any idea if they are all interchangeable?
4/22/2026 8:08:11 PM EDT
[#1]
I don't think an early P series SIG with folded steel slide can be cut for an optic. Here's a thread I was able to find on SIG Talk discussing the question.

https://www.sigtalk.com/threads/does-anyone-mill-a-p228-slide-for-an-optic.451615/

One of the responses mentioned that this legacy P229 slide should work on a P228 frame and can be cut.

https://osagecountyguns.com/firearm-parts/pistol-rifle-parts-kits/handgun-slides/sig-sauer-1204193-01-r.html
4/23/2026 5:45:44 AM EDT
[#2]
For a few dollars more, you can get an optic ready P229 slide.
https://desertdepotarms.com/product/p229-9mm-3-9-slide-assembly-optic-ready-black/
4/23/2026 6:45:14 AM EDT
[#3]
Quote History
Originally Posted By NonTypical361:
For a few dollars more, you can get an optic ready P229 slide.
https://desertdepotarms.com/product/p229-9mm-3-9-slide-assembly-optic-ready-black/
View Quote
I haven't tried myself, but from my understanding, a current P229 slide like that will only work on a P228 frame if the OP also purchases a P229-1 locking insert and a current P229 barrel at additional cost. The legacy slice would work with OP's current parts, and just require milling for the optic.

Switching between slides would require a few extra steps.


4/23/2026 8:48:08 AM EDT
[#4]
You are correct. A P229-1 locking insert and barrel would be required.
4/23/2026 9:08:07 AM EDT
[#5]
I built one off a 228 ebay parts kit.  Pretty easy.  Just need the block and slide.

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