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Sig Sauer P320 Compact RX Caliber X-Change Kit - 9mm

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Sig Sauer P320 Compact RX Caliber X-Change Kit - 9mm



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Sig Sauer P320 Compact RX Caliber X-Change Kit - 9mm


P320® Caliber X-Change™ Kit The modular P320 allows you to select any of several centerfire calibers. Just disassemble the pistol and reassemble it with the X-Change Kit’s barrel/slide assembly, grip module, and magazine.

The ROMEO1 features a molded glass aspheric lens with high performance coatings for superior light transmittance and zero distortion. Manual illumination controls remember your last used settings. Three MOA Red-Dot with multiple intensity settings ensures rapid target engagement under a full range of lighting conditions. The readily available CR1632 battery is top-loading, allowing for quick battery replacement without having to remove the sight from the firearm. Extremely strong and lightweight aircraft grade CNC Magnesium housing ensuring a lifetime of reliable service. Dependable waterproof (IPX-7 rated for complete immersion up to 1 meter) and fog-proof performance.

Additional Information

UPC Code No
Caliber 9mm
Manufacturer Sig Sauer
Trigger Pull SA No
Trigger Pull (DA) No
Overall Length No
Overall Height No
Overall Width No
Sights (detailed) Contrast Sights + Romeo1
Sight Radius No
Weight Empty No
Grips Polymer
Frame Finish Black
Frame Material No
Slide Finish Black
Stock Material No
Barrel Length (in) 3.9 in
Rifling No
Number of Grooves No
Mag Capacity / Rounds 15rd
Number of Mags 1
Sound Reduction No
Accessory Rail Yes
Features No
Safety (detailed) No
Competition Approval No
Magazine Well No
Additional Info No
Bullet Type No
FFL Requirements No
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at

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Product Questions

when will the 9mm p320 compact conversion kit with the red dot sight be back in stock

Referenced product: WCALX-320C-9-B-RX

Response date: 10-9-18

We don't have firm delivery dates but Sig has been averaging about one to two months for deliveries on these. We hope to see some in the next few weeks.

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Customer Reviews

  • RX Change kit.
    Review by Jerry308on 9/20/2019
    Buying from Osage County Guns is so easy the web site is easy to use, and find what you are looking for. I have only use the RX one and the bullet goes where the red dot is. make hitting your target so much faster.
  • Great upgrade for the P320
    Review by Randy Kon 11/12/2018
    I bought the compact RX x-change kit from Osage County Guns and service was excellent. I love the fact that you can get so many options for the P320. I now have a sub compact, compact and full size options for 2 fire control groups. The only problem is that they are addicting.... I also just picked up the Lima frame and an X5!!
  • Happy with Purchase
    Review by Robon 11/12/2018
    I've got about 2k rounds through the RX so far. The dot is very visible in bright sunlight and there are no issues with zero shift. The anodizing (or whatever it is) has started to come off the front right edge of the housing. Not sure if brass is hitting the optic or if I scraped it against something. I've run the gun fairly hard in two Steel Challenge matches and the dot has worked perfectly. The pistol had one failure to eject (stove pipe). I did not lube the gun after its initial wipe down/lubrication. The iron sights are white dot only and NOT night sights. I did have the front sight drift on me. I used a punch to re-center it (it was very easy to move) so I dabbed some blue Loctite under it to hold it until I talked to SIG about getting a new front sight or sending the slide back for repair. The battery that came with the dot didn't last very long but who knows how long it sat in a warehouse. I would estimate I got about a hundred hours out of it. Replacing the battery was very easy as it is top loading. I've only had the new battery for about an hour of use.