SIG Caliber X-Change Kit P320 M18
$511.27
Swap your P320-M18 into a full-size 9mm configuration with this SIG Sauer Caliber X-Change Kit, featuring a 3.9″ Coyote-finished slide assembly. The kit comes with a 21-round magazine, giving you extra capacity right out of the package. Designed specifically for M18 owners looking to expand their platform without buying a complete second pistol.
14 in stock
Sig Sauer Caliber X-Change Kit, 9MM, P320-M18, Coyote Finish, (1)-17 Round & (2)-21 Round Magazines, 3.9″ Configuration 8900268
| Weight | 2.813 lbs |
|---|---|
| Dimensions | 13.000 × 12.150 × 2.250 in |
| Manufacturer | Sig Sauer |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.
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