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I would think that you could search part numbers to determine if they are the same. My guess and only my guess is no.
 

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Does anybody know if the 220 and 245 used the same breech block? Can I put a 245 breech block in my 220?
Being both are discontinued, due to changes in production, going to the Gun Parts Corporation / Numrich website, their parts listing show 2 different part numbers.
 

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What is the problem with your original?
 

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Discussion Starter · #6 ·
I don't have an original. Got a stripped slide as an extra during another purchase. Now just trying to complete it.
 

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Being both are discontinued, due to changes in production, going to the Gun Parts Corporation / Numrich website, their parts listing show 2 different part numbers.
I checked out Numeric earlier but came up empty. Was one of the P/Ns 34221540? I have seen two configurations of breechblocks in the P245; one had a straight/flat bottom on the cartridge pickup rail and the other had the ramp behind the breech face. They both functioned in my P245.

This P220 parts list shows the breechblock P/N as 34221540 but makes no reference to the P245. I haven't been able to find a P/N confirmation for the P245.
P220 Breech Block P:N.001.jpeg

The P245 was the original P220 Compact when both were carbon steel slides. I would be surprised if the P245 has a unique breechblock, but I wouldn't buy one for a P220 based on that. I'm sure SIG CS can answer the question definitively.
 

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I checked out Numeric earlier but came up empty. Was one of the P/Ns 34221540? I have seen two configurations of breechblocks in the P245; one had a straight/flat bottom on the cartridge pickup rail and the other had the ramp behind the breech face. They both functioned in my P245.

This P220 parts list shows the breechblock P/N as 34221540 but makes no reference to the P245. I haven't been able to find a P/N confirmation for the P245.
View attachment 127242

The P245 was the original P220 Compact when both were carbon steel slides. I would be surprised if the P245 has a unique breechblock, but I wouldn't buy one for a P220 based on that. I'm sure SIG CS can answer the question definitively.
ThnkFrst, they use their own numbering (sku), but as astute as they are in making a buck, if they were interchangeable, there would be an annotation, they showed the 220 as #467070B, and the 245 as #872620.
 

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Turns Out I'm Surprised...

The P245 was the original P220 Compact when both were carbon steel slides. I would be surprised if the P245 has a unique breechblock, but I wouldn't buy one for a P220 based on that. I'm sure SIG CS can answer the question definitively.
...and wrong.

SIG CS responded to my question are the breechblocks the same:
"The breech blocks for the 220 and the 245 are actually different."

EDIT: Got a followup email from SIG CS providing this info on part numbers; 34221540-220, 34221645-245
 
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