View Full Version : Sig Caliber X-Change on Standard Gun?

02-22-2012, 8:51 PM
I KNOW I've seen something on this before, but a search didn't help much. Is the standard sig frame any different from the "two-step" 22lr frame? I have the 226 in 9mm. If I saw one for cheap, is there any reason not to pick up a caliber exchange kit for 22/357/40?

02-22-2012, 9:16 PM
There is no difference between the regular 226 frame and the one that comes with the two-step

02-22-2012, 11:16 PM

I shoot a .40S&W slide on my standard 9mm P226 (circa 2010), no problem. I also have a .357Sig barrel for the .40 slide, also works fine.

02-23-2012, 9:47 AM
From the link:
Frames are identical between P226's in 9, .357SIG and .40 S&W except for the ejector.
While in general the frames are identical and switching the slides on a frame is usually accomplished without any issues, it's not unheard of running into problems between different vintage frames. There is also a potential issue with tolerances, in that each part (slide machining vs frame machining) has a specific set of tolerances it must meet before there are no malfunctions/problems but it is possible to find 2 speciments that are at the edges of the tolerance level and will NOT work together. Additionally, as previously mentioned the ejectors are different between the two frames, however there does not appear to be any issues using 9mm ejectors in a .40S&W setup, I have not done much testing with a .40 S&W ejector in a 9mm setup.

02-23-2012, 2:00 PM
You might also check and see if you'll run into issues with the locking block. I can't remember off-hand is the looking block for the .40 and the 9mm are the same

02-23-2012, 3:59 PM
Thanks for the replies, fellas. I am not familiar with the term "locking block" do you mean the large insert that is slotted in around the trigger pin?

02-23-2012, 6:35 PM
Yes, it is the part that determines when the barrel locks and unlocks from the slide

The SIG 220 has different locking blocks for the different length slides and different chamberings