AR-15 Barrel, 9mm, 4.5"

Name: AR-15 Barrel, 9mm, 4.5"
Brand: Faxon Firearms

Faxon Firearms · Barrels

No ratings yet

Best price

$109.00at Faxon Firearms

checked Oct 1, 2026

Buy at Faxon Firearms

Compare 2 stores

Where to buy

Store	Price	Availability	Buy	Add to build
Faxon Firearms Best price	$109.00checked Oct 1, 2026	Check store	Buy at Faxon Firearms
Brownells	$105.80checked Oct 1, 2026	Out of stock	Buy at Brownells

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Show

Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$105.80	$105.80	$105.80
Faxon Firearms	$109.00	$109.00	$109.00

Since Sep 27, 2026.

About this part

The AR-15 Barrel, 9mm, 4.5" is a 4.5" 9mm barrel from Faxon Firearms. It's sold by 2 stores, from $105.80 to $109.00.

Fits and works with

Caliber: 9mm · Shop matching ammo
Bolt: 9mm · Bolt carrier groups
Barrel length: 4.5" · Handguards

Specifications

Manufacturer: Faxon Firearms
Platform: AR-9
Barrel length: 4.5"

From the manufacturer

Faxon Firearm's 9mm barrels are manufactured from 4150 GBQ Steel. For AR Carbines, they use 1/10 twist to ensure stabilization across all grains of 9mm loadings. Further, they feature QPQ Black Nitride coating for superior corrosion resistance and longevity. Muzzles have ½” x 28 threads, are target crowned, and have concentric threads ready for suppressor use. All barrels are fully magnetic particle inspected.

Note: While the barrels are threaded to 1/2-28 please make sure to use the proper diameter muzzle device.

Big Book Catalog, Issue:70, Page:018