Barrels
Maximize your accuracy and velocity with a premium barrel. Shop precision rifle and carbine barrels featuring optimal twist rates, salt nitrided or chrome lining, and threaded muzzles.
Rifle, AR-15, Handgun and Shotgun Barrels
A barrel has more effect on accuracy than any other part of your firearm. Boss Firearms carries replacement and upgrade barrels from LMT Defense, Proof Research, Q, Heckler & Koch and more, in calibers from 5.56 and .300 Blackout to 6.5 Creedmoor and 8.6 BLK.
Shop by type:
- AR-15 barrels in chrome-lined and stainless steel, from 10.5" to 20"
- Rifle barrels, including lightweight Proof Research carbon fiber barrels for precision builds
- Handgun barrels, including threaded barrels for suppressor use
- Shotgun barrels and M203 barrels
- Barrel actions for complete builds
LMT MRP barrel assemblies are a popular choice because the monolithic upper lets you swap barrels and calibers in minutes. Pair a new barrel with a muzzle device or suppressor, and see our LMT Defense parts for matching upper components.
Not sure what fits your rifle? Call 979-704-6269 and we will check compatibility before you order.
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Proof Research - 12.5" 300BLK LMT Carbon Fiber Barrel - 100523
Proof Research
$999.99The Proof Research 12.5" .300 Blackout LMT Carbon Fiber Barrel (100523) is a precision drop-in replacement barrel for LMT MRP/MWS quick-change barrel systems chambered in .300 Blackout. The 12.5-inch...$999.99 -
Out of stock
Noveske - 12.5" Leonidas Barrel 223 Rem/556NATO - #07000200
Noveske
$380.00UPC 840906111963 Manufacturer Noveske Manufacturer Part # 07000200$380.00 -
Noveske - 11.5" Commando Barrel 223 Rem/556NATO - 07000050
Noveske
$360.00The barrel ships with a gas block. This barrel is designed for our gas block that is 1″ long (INCLUDED). A standard front sight base is 1.9″ long and WILL NOT FIT. Barrel installation should be...$360.00 -
Noveske - 10.5" 556NATO Barrel 1:7 Twist Carbine Length Gas System - 07000048
Noveske
$340.00Noveske is proud to manufacture premium barrels for all types of builds. This barrel ships with gas block. This barrel is designed for the Noveske gas block that is 1" long (INCLUDED). A standard...$340.00 -
LMT Defense - AR-15 Barrel 8.25" 300 Blackout - L7BX1B
LMT Defense
MSRP: $598.00$554.40The LMT Defense AR-15 8.25" .300 Blackout MRP-L Barrel (L7BX1B) is LMT's most compact .300 Blackout barrel assembly, designed for ultra-short SBR, AR pistol, and suppressed builds on the LMT MRP-L...MSRP: $598.00$554.40 -
Out of stock
Heckler & Koch - AR-15/HK416 Carbine Buffer Tube black - 227474
Heckler & Koch
$45.00The Heckler & Koch AR-15/HK416 Carbine Buffer Tube — Black (HK PN: 227474) is the genuine HK factory mil-spec carbine buffer tube (receiver extension) for HK416 and compatible AR-15/M4 pattern rifles...$45.00 -
Out of stock
Volquartsen - VF-9 Lightweight Barrel for 22 Charger Threaded - #VF-0001
Volquartsen
$355.00When you're going all out with a custom 22 Charger build, our VF-9 Barrel is the perfect complement for your aftermarket, stubby barrel chassis. Specs Product Number VF9‑0001 Approximate...$355.00 -
Proof Research AR-Style Barrel 308 Win. 16" 1:10" Twist 5/8-24 Carbon Fiber Wrapped 101261
Proof Research
MSRP: $1,149.00$999.00Upgrade your AR-10 platform with the pinnacle of barrel technology: the Proof Research AR-Style .308 Winchester 16" Carbon Fiber Barrel (Part 101261). Designed for tactical shooters, hunters, and...MSRP: $1,149.00$999.00 -
Proof Research CZ 455/457 .22LR 18.5" Threaded Barrel 121443
Proof Research
$825.00The Proof Research .22 LR 18.5” Threaded Barrel (121443) brings Proof Research’s legendary aerospace-grade carbon fiber barrel construction to the .22 LR rimfire platform. This prefit carbon fiber...$825.00 -
Out of stock
Proof Research AR-Type Barrel 308 Win. 18" Rifle Length 100028
Proof Research
$1,149.00The Proof Research .308 Winchester 18” Rifle-Length Carbon Fiber AR-Type Barrel (100028) delivers match-grade precision from .308 Win and 7.62 NATO AR-10, DPMS-pattern, and SR-25 semi-automatic...$1,149.00 -
Proof Research 16" Carbon Fiber 223 Wylde Barrel 1:8- 5/8-24 143254
Proof Research
$1,149.00The PROOF Research carbon fiber barrel cuts weight from an AR-15 without giving up accuracy. It is a 16" barrel with a .223 Wylde chamber, so it shoots both .223 Remington and 5.56 NATO, and a 1:8...$1,149.00 -
Proof Research 338ARC 16" Carbon Fiber .338 ARC Barrel 145609
Proof Research
$1,149.00The Proof Research .338 ARC 16" Carbon Fiber Barrel (145609) is one of the first precision carbon fiber barrels available for the .338 ARC (Advanced Rifle Cartridge) — a powerful, medium-bore...$1,149.00