Backup Tactical Threaded Barrel for SIG P320 Compact 9mm | Black Nitride
Not Yet Rated | Write the First Review SKU: 222-BAC-S320TB-BLK-FS
UPC: 686696690376
MFG#: S320TB-BLK-FS

Backup Tactical Threaded Barrel for SIG P320 Compact (9mm)

If you want a straightforward way to add 1/2x28 muzzle threads to a standard P320 Compact build, this barrel is the simple answer—no fluff, just solid materials, clean machining, and a finish that holds up.

This model is intended for the standard SIG P320 Compact that uses the 3.9" factory barrel, and it is not for the P320 X-Series Compact.

Key features

• Caliber: 9mm Luger (SAAMI spec)

• Thread pitch: 1/2x28

• Material: 416 stainless steel

• Finish: Black nitride

• Twist rate: 1:16

• Rifling: Pulled-broach

• Overall length: 4.52"

• LCI: Cut for LCI, compatible with P320s with or without LCI

• Thread protector: Included

Fitment and compatibility

This barrel is designed for the SIG P320 Compact (3.9" barrel length platform). If you’re not sure what you have, check your model name and factory barrel length before ordering.

• Fits: Standard P320 Compact that uses the 3.9" factory barrel

• Does not fit: P320 X-Series Compact

What you’ll receive

• Backup Tactical threaded barrel (Black)

• Thread protector

Product identifiers

• Manufacturer part number: S320TB-BLK

• UPC: 686696690338

Notes on use

For best results, follow manufacturer guidance and consider professional installation if you’re not experienced with pistol parts. Always verify function and safety before live use.

FAQ

Will this fit a SIG P320 X-Compact or X-Series Compact?
No. This model is for the standard P320 Compact that uses the 3.9" factory barrel, not the X-Series Compact.

What thread pitch does it use?
1/2x28.

Does it include a thread protector?
Yes, a thread protector is included.

Is it compatible with an LCI setup?
Yes. It is cut for LCI and is listed as compatible with P320s with or without LCI.

What is the barrel made from and what finish is it?
416 stainless steel with a black nitride finish.

Is it a drop-in barrel?
Many users treat it as a drop-in replacement, but fit can vary by pistol. If you run into resistance or cycling issues, stop and consult a qualified gunsmith.

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