Sig Sauer Pro-Cut Slide Assembly for P320 9mm, 3.9" Barrel, X-Ray 3 Suppressor Sights, R2 Optic ReadySig Sauer$412.50
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Sig Sauer
The Sig Sauer P320 X-Series 9mm slide assembly with 3.9" barrel gives your P320 a factory-engineered upgrade path. This is the slide only—barrel and recoil assembly sold separately—so it's ideal if you're building a custom P320 or replacing a worn component. It's milled optic-ready from the factory, comes dressed in suppressor-height X-Ray 3 sights, and wears a durable DLC matte finish over stainless steel that'll stand up to hard use.
The optic-ready cut accepts Romeo 1 Pro, Romeo 2, Delta Point Pro, and RMR footprints (RMR install requires the included sealing plate), giving you flexibility to mount your preferred red dot. The X-Ray 3 day/night suppressor sights stay visible behind a mounted optic—a real advantage for shooters running cans or planning to. The removable flush-fit optics plate features top-accessible screws, so you're not fumbling with the gun upside down at the bench.
This 3.9" slide pairs with standard 9mm sub-compact, X-Compact, and Compact P320 grip modules. It's 9mm only—not compatible with .40, .357, or .45 frames. Because it's a factory Sig Sauer part, it won't void your warranty, and it's built to the same tight tolerances as the complete guns.
| Brand | Sig Sauer |
| Product Type | Slide Assembly (slide only) |
| Caliber | 9mm Luger |
| Barrel Length | 3.9" (non-threaded); also fits 4.6" threaded barrels |
| Slide Finish | Nitron DLC (Durable Luster Coating), matte black |
| Slide Material | Stainless Steel |
| Sights | X-Ray 3 suppressor-height day/night |
| Optic Ready | Yes (PRO-cut footprint) |
| Compatible Optic Footprints | Romeo 1 Pro, Romeo 2, Delta Point Pro, RMR (requires sealing plate) |
| Loaded Chamber Indicator | No |
| Fits | P320 sub-compact, X-Compact, and Compact grip modules |
| Not Compatible With | .40 S&W, .357 SIG, or .45 ACP |
| What's Included | Slide assembly and removable optics plate |
| Not Included | Barrel, recoil spring assembly, grip module |
No. This 3.9" slide is designed for P320 sub-compact, X-Compact, and Compact grip modules. It is not compatible with full-size grip frames.
This assembly is designed to pair with standard 9mm barrels. The 3.9" non-threaded barrel and 4.6" threaded barrel will work with this slide. You'll need to source your own barrel and recoil spring assembly if you don't already have them—they're not included.
The PRO-cut slide accepts Romeo 1 Pro, Romeo 2, Delta Point Pro, and RMR footprints. If you're mounting an RMR, you'll need the included sealing plate.
No. This is a factory Sig Sauer part, and using it as a replacement or upgrade will not void your warranty.
Sig Sauer
The Sig Sauer P320 X-Series 9mm slide assembly with 3.9" barrel gives your P320 a factory-engineered upgrade path. This is the slide only—barrel and recoil assembly sold separately—so it's ideal if you're building a custom P320 or replacing a worn component. It's milled optic-ready from the factory, comes dressed in suppressor-height X-Ray 3 sights, and wears a durable DLC matte finish over stainless steel that'll stand up to hard use.
The optic-ready cut accepts Romeo 1 Pro, Romeo 2, Delta Point Pro, and RMR footprints (RMR install requires the included sealing plate), giving you flexibility to mount your preferred red dot. The X-Ray 3 day/night suppressor sights stay visible behind a mounted optic—a real advantage for shooters running cans or planning to. The removable flush-fit optics plate features top-accessible screws, so you're not fumbling with the gun upside down at the bench.
This 3.9" slide pairs with standard 9mm sub-compact, X-Compact, and Compact P320 grip modules. It's 9mm only—not compatible with .40, .357, or .45 frames. Because it's a factory Sig Sauer part, it won't void your warranty, and it's built to the same tight tolerances as the complete guns.
| Brand | Sig Sauer |
| Product Type | Slide Assembly (slide only) |
| Caliber | 9mm Luger |
| Barrel Length | 3.9" (non-threaded); also fits 4.6" threaded barrels |
| Slide Finish | Nitron DLC (Durable Luster Coating), matte black |
| Slide Material | Stainless Steel |
| Sights | X-Ray 3 suppressor-height day/night |
| Optic Ready | Yes (PRO-cut footprint) |
| Compatible Optic Footprints | Romeo 1 Pro, Romeo 2, Delta Point Pro, RMR (requires sealing plate) |
| Loaded Chamber Indicator | No |
| Fits | P320 sub-compact, X-Compact, and Compact grip modules |
| Not Compatible With | .40 S&W, .357 SIG, or .45 ACP |
| What's Included | Slide assembly and removable optics plate |
| Not Included | Barrel, recoil spring assembly, grip module |
No. This 3.9" slide is designed for P320 sub-compact, X-Compact, and Compact grip modules. It is not compatible with full-size grip frames.
This assembly is designed to pair with standard 9mm barrels. The 3.9" non-threaded barrel and 4.6" threaded barrel will work with this slide. You'll need to source your own barrel and recoil spring assembly if you don't already have them—they're not included.
The PRO-cut slide accepts Romeo 1 Pro, Romeo 2, Delta Point Pro, and RMR footprints. If you're mounting an RMR, you'll need the included sealing plate.
No. This is a factory Sig Sauer part, and using it as a replacement or upgrade will not void your warranty.