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FAXON MATCH SERIES FLAME FLUTED® BARREL FOR P320 FULL SIZE 9MM
Faxon
$126.00
Description
Pistol Barrels › For SIG® › For P320 Full Size
Fit and Compatibility
This barrel is a direct replacement for the factory barrel in SIG® P320 Full Size slides. It is machined to tight tolerances for consistent lockup, and it drops into factory-spec slides with no gunsmithing. On some aftermarket slides, minor fitting may be needed.
Compatibility: Not compatible with M17 or X Series pistols (including the X5 and X5 Legion).
How It’s Made
Every Faxon pistol barrel starts as a long 416-R stainless barrel blank that Faxon rifles in-house before it is ever cut into pistol barrels. That way the whole blank gets the same rifling, inspection, and stress relief, and every barrel cut from it starts from a qualified bore.
- Drill and ream: 416-R stainless bar gun-drilled and reamed as a long blank
- Button rifle: Button rifled 1:10, six grooves
- Air gauge: Bore and rifling air gauged
- Stress relieve: Stress relieved in-house after rifling, just like Faxon rifle barrels
- Cut and qualify: Blank cut to length and qualify-turned true to the bore
- Turn and mill: Hood, lugs, and Flame Fluted® profile turned and milled; 9mm SAAMI chamber and target crown cut
- Heat treat: 416-R heat treated to pistol-barrel hardness; 416-R isn’t hard enough for a pistol barrel as bar stock, while 4150 is
- Finish: Salt-bath QPQ nitrided inside and out
- Mark and inspect: Laser-marked and final inspected
Six-groove button rifling is land-and-groove rifling, not polygonal, so it runs jacketed and cast lead bullets. Salt-bath QPQ nitride is a diffusion treatment, not a plating: it hardens the bore and exterior and adds corrosion resistance and lubricity while adding virtually nothing to the dimensions.
How We Inspect It
Faxon pistol barrels are built to a written control plan, and each run is logged on inspection sheets. Here is what this barrel goes through before it ships.
| Burr check | Every barrel inspected for burrs under 10x magnification |
| Hood fit | Every hood run through a go/thru gauge |
| CMM | First and last barrel of every run checked on the CMM |
| First article | Full CMM first-article inspection after any machine maintenance, tool change, or part change, and at least every 30 days |
| Certifications | Material certs checked at receiving; stress relief certified by lot |
Flame Fluted® Profile
Faxon’s patented Flame Fluted® design cuts weight and adds surface area for faster cooling, with the distinctive Faxon look.
What’s in the Box
INCLUDED
P320 Full Size 9mm barrel
416-R stainless, salt-bath QPQ nitride, inside and out, 4.72″
NOT INCLUDED
Slide, recoil assembly
Uses your factory recoil assembly.
Specifications
| Caliber | 9mm Luger (9x19), SAAMI chamber |
| Fits | SIG® P320 Full Size slides |
| Length | 4.72″ |
| Series | Match Series |
| Profile | Flame Fluted® |
| Material | 416-R stainless, heat treated and stress relieved |
| Rifling | Button rifled, 1:10 twist, 6 grooves (land and groove) |
| Inspection | Bore and rifling air gauged |
| Finish | Salt-bath QPQ nitride, inside and out |
| Muzzle | Non-threaded, target crown |
| Made in | Greater Cincinnati, Ohio, USA |
| FFL | Not required |
What Owners Say
“I built a full sized Sig P320 pistol using a Sig Sauer FCU as the basis. The Faxon barrel fit perfectly with no modifications and its flame fluting looks great as the slide of the pistol has side cuts.”
Patrick M. Simpson, verified buyer
“I purchased for my Sig 320 M17. I did not realize the M17 version was different.”
John Schrader, verified buyer
“Fit and finish is far superior to factory. I was having issues with the accuracy of my factory barrel (it just wasn’t grouping as well as I thought it should).”
John B., verified buyer
Average rating: 5.0 out of 5 stars from 4 reviews on FaxonFirearms.com.
What Reviewers and Dealer Customers Say
“The barrel shoots the rounds really accurately and the coating holds up beautifully.”
hanuman, Midwest Gun Works review • Read it ›
“the Faxon barrel out shoots OEM barrels. ... I’ll take that kind of accuracy every day of the week.”
Brownells reviewer, Brownells review • Read it ›
“The barrel has better fitment than the OEM barrel. It drops in and locks with zero play. The fliers disappeared with this barrel.”
dmz, OpticsPlanet review • Read it ›
Quotes from third-party reviews and dealer listings; some cover the same barrel in another finish or threaded configuration.
Every Faxon Barrel for the P320 Full Size
| Barrel | Steel | Muzzle | Finish | MSRP |
|---|---|---|---|---|
| Match Series Flame Fluted® (this barrel) | 416-R stainless | Non-threaded | Black nitride | $126 |
| Duty Series | 4150 CMV | Non-threaded | Black nitride | $98 |
| Duty Series | 4150 CMV | Threaded | Black nitride | $99 |
| Match Series Flame Fluted® | 416-R stainless | Threaded | Black nitride | $131 |
| Match Series Flame Fluted® | 416-R stainless | Threaded | Chameleon PVD | $152.75 |
Match Series P320 Full Size Barrel FAQs
Is this barrel drop-in?
Yes. It is a direct replacement for the factory barrel in SIG® P320 Full Size slides with no gunsmithing on factory-spec slides. Some aftermarket slides may need minor fitting.
How is it rifled?
Button rifled, 1:10 twist, with six grooves. Faxon rifles a long blank in-house, air gauges the bore and rifling, and stress relieves it before cutting it into pistol barrels.
Can I shoot cast lead bullets?
Yes. Six-groove button rifling is land-and-groove rifling, not polygonal, so it runs both jacketed and cast lead bullets.
What is the difference between Duty Series and Match Series pistol barrels?
Duty Series barrels are 4150 CMV in an OEM-style profile with salt-bath nitride inside and out. Match Series barrels are 416-R stainless, heat treated for pistol-barrel hardness, and come in fluted profiles and PVD color options.
What finish is it?
Salt-bath QPQ nitride, inside and out.
Where is it made?
In Greater Cincinnati, Ohio. Pistol barrels ship without an FFL.
SIG®, SIG SAUER®, P320®, and P365® are trademarks of SIG SAUER, Inc. Faxon Firearms is not affiliated with or endorsed by them; model names are for compatibility only. Flame Fluted® and EXOS® are trademarks of Faxon Firearms. Know and follow all federal, state, and local laws.
Warranty
Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, non-standard ammunition, or modifications. Register your product at faxonfirearms.com/product-registration to expedite service. For purchases through dealers or distributors, warranty repairs are handled directly by Faxon Firearms; refunds must be processed through the selling entity. Full policy: faxonfirearms.com/warranty-privacy-terms/Customers Also Shopped These Items
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Reviews
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Full size Sig 320 barrel.
Fit and finish is far superior to factory. I was having issues with the accuracy of my factory barrel (it just wasn't grouping as well as I thought it should). Caught the 4th of July sale and purchased this barrel and problem solved. Fit and functioned perfectly and shoots like a lazer! Buy with confidence.
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Does not fit Sig 320 M17
I purchased for my Sig 320 M17. I did not realize the M17 version was different. There is a slot in the chamber end of the barrel for the loaded indicator that does not exist in the Faxon barrels.
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Faxon Sig P320 Fullsize Flame Fluted barrel, non-threaded
I built a full sized Sig P320 pistol using a Sig Sauer FCU as the basis. The Faxon barrel fit perfectly with no modifications and its flame fluting looks great as the slide of the pistol has side cuts.
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P320 full size nitride
Outstanding barrel.