Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
SIG SAUER P320 9 mm 5.5in Pistol Barrels - Threaded
$229.99 $189.99 Save 17%
View Product
Compare (0)
Most Helpful Positive Review Used in a Flux Raider
Not a whole lot to say about this barrel other than it's OEM, seems to shoot as well as an OEM barrel ought to (I'm not shooting precision with it so can't weigh in on those fractions of MOA evaluations) and cycles and feeds like it should. I had it in a Flux Raider with a Sig Pro Cut 4.7 slide and ...
Read More...
Most Helpful Negative Review Sig Sauer P320 Threaded Barrel
It’s probably perfect for any other P320. For an X5 Legion, it doesn’t fit. Total waste of time and money for me. Also, Thankfully I was at a range that was also a registered Sig Sauer dealer. The Range Officer told me there that sir had sent out a memo that no other P320 barrels would fit the X5 Le...
Read More...
Show
Sort by
Filter by

Sig p320 threaded barrel

by Bacdoc, Verified Owner from AZ, United States Written on March 8, 2025
Excellent product, fit and finish is top notch. Worked really well in my flux raider build. I highly recommend it.
Would recommend: Yes
Was it helpful to you? Yes | No

Great product

by J B, Verified Owner from SC, United States Written on February 12, 2025
Once I received it I knew it was made for my P320. The threaded Barrel fit great and look great. at first I said it was not worth it but now I glad I made the decision to get this item it works and look like a difference Pistol.

Great Item.
Would recommend: Yes
Was it helpful to you? Yes | No

perfect fit

by steve, Verified Owner from AR, United States Written on February 6, 2025
Direct replacement ad a threaded barrel without any issues
Pros:
  • Direct Fit
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Sig quality

by Rod, Verified Owner from AZ, United States Written on October 10, 2024
Have a full size p250. Fits perfectly as sig said it would.
Best Used for:
  • Suppressor
Would recommend: Yes
Was it helpful to you? Yes | No

Full Sized Threaded Sig P320 Barrel

by Bob R, Verified Owner from TX, United States Written on September 21, 2024
I bought the Threaded Sig P320 Full Size Barrel. Both are awesome and as expected to be used to install a compensator or suppressor on the Sig P320 models. CAUTION to purchasers who wish to replace the Sig P320 X-Five Legion "bull barrel" with the full size threaded barrel as it doesn't fit properly. You must find a 3rd party manufacturer for a threaded "bull barrel" for the Legion.
Pros:
  • Works as advertised and reasonably priced
Cons:
  • Doesn't replace Bull Barrel in P320 Full Sized X5 Legion
Best Used for:
  • Compensators or suppressors
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Great barrel for suppressor or compensator

by Patrick Smith, Verified Owner from TX, United States Written on June 23, 2024
Great threaded barrel from Sig. Works great with a suppressor or compensator. Works with the stock slide or the pro cut slides.
Would recommend: Yes
Was it helpful to you? Yes | No

Great barrel

by NM guy, Verified Owner from NM, United States Written on February 22, 2024
Reliable option for a full size 320. Used in a Raider build. Used an M17 first and later a 320 VTAC slide. Few hundred rounds and no problems with the barrel in either slide. Obviously the LCI had to be removed from the M17 slide. Would recommend when pairing with OEM slides.
Would recommend: Yes
Was it helpful to you? Yes | No

Too long for RXP Full-size

by IronFusion, Verified Owner from PA, United States Written on January 23, 2024
Some expert answer on this or a compensator incorrectly stated the 5.5" barrel is needed for RXP Full-size. There was a half-inch or more barrel length than needed.
Pros:
  • None
Cons:
  • Too long for compensator with RXP Full-size
Would recommend: No
Was it helpful to you? Yes | No

Works great

by Mike, Verified Owner from AZ, United States Written on November 3, 2023
Works great just know if you have an M17/M18 version you'll have to remove the LCI... super easy just an extra step.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Junk barrel

by ecm, from MO, United States Written on October 30, 2022
Sig makes nice looking stuff. Just not stuff that functions with cans I guess. As far as I’m concerned might as well have thrown my money down a toilet. The p320 refuses to go back into battery after each shot with can on it.
Pros:
  • Nice machining
Cons:
  • function
Best Used for:
  • Paperweight
Would recommend: No
0 of 20 found the following review helpful.
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?