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AR15.COM
2/8/2026 12:19:15 PM EDT
I’m pretty sure I know the answer. I have an Sig P228R that I wanted to throw an optic on. I think I am unable to cut the slide because of the “breach block”. The Reddit community recommends buying an already cut 229 slide. Do y’all agree with that? Trying to find the most cost effective way to do this.

Thanks!

Frank-
2/8/2026 12:40:07 PM EDT
[#1]
As I understand it, that's a P229 frame, so a modern optic cut P229 slide should work, which is what I did for my M11A1.





Picked up the slide with a 6 MOA Sig Romeo1Pro and suppressor height sights for $500 at Proven Arms and resold the optic for $250. Sadly, they don't seem to have any in stock now.
2/8/2026 1:24:30 PM EDT
[#2]
Originally Posted By FPodo:
I’m pretty sure I know the answer. I have an Sig P228R that I wanted to throw an optic on. I think I am unable to cut the slide because of the “breach block”. The Reddit community recommends buying an already cut 229 slide. Do y’all agree with that? Trying to find the most cost effective way to do this.

Thanks!

Frank-
View Quote


https://www.sigsauer.com/p229-9mm-3-9-slide-assembly-optic-ready-black.html
2/10/2026 11:09:52 AM EDT
[#3]
Swap the slide, it will be much easier.  Plus the 228 has some collector interest.  Cult is more like it.
3/25/2026 10:39:49 PM EDT
[#4]
Dont you have to have the matching barrel assuming all the available 229 slides are -1?

Im asking because i have a 2008 P228R that id love to toss an optic on. The only ones currently available are legion 229 slides.  Im new to modding pistols.
3/26/2026 8:58:52 AM EDT
[#5]
Yea, you best not mess with the 228R.  Got a little bit of rarity there.  Best off just getting a used 229 and go from there.

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