AR-15 Modern Series 5.5 Barrel
$83.99 at Brownells · 5 stores
In stock Sale
Best price
$79.99at Brownells
Out of stock checked Oct 22, 2026
In stock now instead
- AR-15 Modern Series 5.5 Barrel $83.99at Brownells
- Lead & Steel AR-9 9mm Threaded AR Barrel 5.5in Straight Blowbac… $85.99at OpticsPlanet
- PW9 AR Pistol Barrel 9mm 1-10 Twist 1/2-28 Thread 4.5in Black 4… $70.49at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $79.99checked Oct 22, 2026 | Out of stock | Buy at Brownells | |
| Kentucky Gun Co | $107.10checked Oct 22, 2026 | Out of stock | Buy at Kentucky Gun Co |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Similar barrels in stock
This part is out of stock at every store we track. These similar barrels are in stock, with today's prices.
Lead & Steel AR-9 9mm Threaded AR Barrel 5.5in Straight Blowback 1-10 Twist 1/2x36 Nitride Black
$85.99 at OpticsPlanet · 2 stores
In stock Sale
PW9 AR Pistol Barrel 9mm 1-10 Twist 1/2-28 Thread 4.5in Black 4.5in
$70.49 at OpticsPlanet
In stock Sale
Lead & Steel AR-9 9mm Threaded AR Barrel 11.3in Straight Blowback 1-10 Twist 1/2x36 Nitride Black
$91.99 at OpticsPlanet
In stock Sale
TRYBE Defense Rifle Barrel Threaded AR-15 9mm Luger 16.25 inch Medium Taper Twist 1/2x36 TPI Black Nitride Black
$92.63 at OpticsPlanet
In stock Sale
Diamondback Firearms OEM Replacement AR Barrel 10in 9mm Luger 1-9.84in Twist Black Nitride 4150 Chrome Moly Vanadium Steel
$66.00 at Kentucky Gun Co · 5 stores
In stock
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $79.99 | $79.99 | $79.99 |
| Kentucky Gun Co | $107.10 | $107.10 | $107.10 |
Since Sep 28, 2026.
About this part
The AR-15 5.5" Bloodline Barrel Medium 1-10tw 1/2-28 9mm is a 5.5" 9mm barrel from Rosco Manufacturing with a carbine gas system. It's sold by 2 stores, from $79.99 to $107.10.
Fits and works with
- Caliber
- 9mm · Shop matching ammo
- Bolt
- 9mm · Bolt carrier groups
- Gas system
- Carbine · Handguards
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 5.5" · Handguards
Specifications
- Manufacturer
- Rosco Manufacturing
- Platform
- AR-9
- Caliber
- 9mm
- Gas system
- Carbine
- Barrel length
- 5.5"
- Thread pattern
- ½ x 28
From the manufacturer
The Rosco 5.56 barrels are designed to meet the modern-day carbine shooters requirements. Rosco Manufacturing is a long way from your daddy's "Sporter" AR, and those specs just won't cut it anymore. From properly managed dwell times for SBR's, to running Suppressed, or setting up a balanced patrol carbine they have incorporated your needs into our engineering. Rosco has successfully accomplished this by picking the right twist rates, gas port diameters, and barrel materials according to the barrel they are making (not a lazy blanket method). They have also balanced input from our consumers and military end users to bring you the product you need, not just the Mfg: Rosco Manufacturing
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