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  1. P250, P320, P320 X-5, M17, & M18 Pistols
    I see a lot of exchange kits for the SIG P320 in 9mm, 357 SIG, and .40 Short & Weak, but it seems the .45 ACP in carry or compact are a entity of their own. I thought there was the Fire Control Group (aka FCG) that was interchangeable between ALL calibers. Surely you don't tell me that there...
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