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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Out of stock
LMT Defense - 5.56mm M4/M16 20" AR15 Barrel Assembly - LMP10409
LMT Defense
$440.1020″ CHROME LINED 1:7″ TWIST M16/M4-STYLE 5.56 BARREL W/ A-FRAME FRONT SIGHT HOUSING. DOES NOT INCLUDE UPPER RECEIVER, FRONT SIGHT POST, SWIVEL, OR SLIP RING...$440.10 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 14.5" AR15 Barrel Assembly - LMP10406
LMT Defense
Now: $401.40Was: $428.40This is a Lewis Machine & Tool M4/M16 style 14.5-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, carbine-length gas system,...Now: $401.40Was: $428.40 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 10.5" AR15 Barrel Assembly - LMP10408
LMT Defense
Now: $401.40Was: $451.80This is a Lewis Machine & Tool M4/M16 style 10.5-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, delta-ring handguard retainer, GI...Now: $401.40Was: $451.80 -
Out of stockOn Sale
LMT Defense - 5.56mm 16" Stainless Steel MRP Barrel Assembly - L7SB1S
LMT Defense
Now: $803.70Was: $893.0016″ Stainless Steel 5.56×45 (.223) 1:7.5″ RH 5R cut barrel Designed for the LMT monolithic receiver, this barrel utilizes a low profile gas block, mid length straight gas tube, and A2 birdcage for...Now: $803.70Was: $893.00 -
Volquartsen Summit Rifle Barreled Action .22 LR VCB-0282
Volquartsen
$1,165.00The Volquartsen Summit barreled action (VCB-0282) is the action and barrel of Volquartsen's Summit .22 LR rifle, sold without a stock. The Summit uses a fast straight-pull bolt, and its receiver is...$1,165.00 -
Out of stock
LMT Defense - 350 Legend 16" Stainless Steel Barrel Assembly - L7KA1S
LMT Defense
$627.00The LMT Defense 16" Stainless Steel 350 Legend MRP-L Barrel Assembly (L7KA1S) brings LMT's renowned Monolithic Rail Platform modularity to the .350 Legend cartridge — America's most popular...$627.00 -
LMT Defense - 5.56 NATO 16" Stainless Steel Barrel Assembly - L7SB1B
LMT Defense
MSRP: $893.00$828.00The LMT Defense 16" Stainless Steel 5.56 NATO MRP-L Barrel Assembly (L7SB1B) is a premium match-quality barrel designed for LMT's MRP-L Monolithic Rail Platform upper receivers. Machined from...MSRP: $893.00$828.00 -
Out of stockOn Sale
LMT Defense - 5.56 NATO 20" Stainless Steel Barrel Assembly - #L7SD1B
LMT Defense
MSRP: $893.00Now: $803.70Was: $828.00Specs: Caliber: 5.56 NATO Barrel Length: 20" Barrel Material: Stainless Steel (SS) Rifling Twist Rate: 1:7"MSRP: $893.00Now: $803.70Was: $828.00 -
Proof Research - 6.5 Creedmoor 16" Carbon Fiber Barrel - 123515
Proof Research
$1,250.00The Proof Research 6.5 Creedmoor 16" Carbon Fiber Barrel (123515) brings the legendary accuracy and lightweight advantages of Proof Research carbon fiber technology to a compact 6.5 Creedmoor AR-type...$1,250.00 -
Out of stockOn Sale
Proof Research - 26" Carbon Fiber Sendero .284 Bolt Action Rifle Barrel - #106556
Proof Research
Now: $899.00Was: $999.00By designing a bolt action barrel blank, we have opened up countless options for chambering in your favorite caliber and having the ability to fit a large variety of actions. Our bolt-action barrels...Now: $899.00Was: $999.00 -
Out of stock
Heckler & Koch -P30L 9mm Tactical Barrel Threaded 13.5x1 LH - #229792
Heckler & Koch
$292.00Made in Germany at the HK factory from HK German Cold Hammer Forged barrel blanks, heat treated and finished to HK specs. This is the only HK factory manufactured P30L threaded barrel. The finest...$292.00 -
Out of stockOn Sale
LMT Defense - 5.56/.223 MRP 14.5″ Barrel - #L7NA1B
LMT Defense
MSRP: $529.00Now: $476.99Was: $529.00This barrel is specifically engineered for the LMT monolithic receiver, featuring a low-profile gas block, carbine-length straight gas tube, and an A2 birdcage to minimize flash. It is coated and...MSRP: $529.00Now: $476.99Was: $529.00