WMD Guns AR-15 Barrel - 5.5" - 9mm - Medium Profile - 1:10 Twist
or 4 interest-free payments of $30.38 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the WMD Lifetime Warranty! what it covers
Product description
Compact 9mm Barrel for Direct-Blowback AR Builds
Features
- 5.5″ barrel length keeps compact 9mm AR builds short and maneuverable
- Designed for direct-blowback 9mm AR operating systems with no gas tube or gas block required
- 1:10 twist rate stabilizes common 9mm projectile weights
- Medium barrel profile provides a balance of rigidity and overall weight
- Black nitride finish provides a hard, corrosion-resistant surface inside and outside the barrel
The WMD Guns 5.5″ 9mm barrel is built for compact direct-blowback AR configurations where a short barrel and straightforward operating system are preferred. Its medium profile and 1:10 twist provide a practical setup for common 9mm ammunition, while the black nitride treatment provides added surface protection and wear resistance.
Note: This 9mm barrel uses a direct-blowback operating system and does not require an AR gas block or gas tube. Muzzle thread specification should be confirmed before selecting a muzzle device, as current WMD documentation for its 5.5″ 9mm barrel lists 1/2×36 while distributor data for MPN 9mm5.5 1-10 lists 1/2×28.
Specifications
- Brand: WMD Guns
- MPN: 9mm5.5 1-10
- Caliber: 9mm
- Barrel Length: 5.5″
- Profile: Medium
- Twist Rate: 1:10
- Operating System: Direct Blowback
- Muzzle Thread: 1/2×28
- Finish: Black Nitride
- Color: Black
What’s Included
- 1x WMD Guns 5.5″ 9mm Barrel
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Questions & Answers
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Warranty & returns
Backed by the WMD Lifetime Warranty!
WMD Guns Limited Lifetime Warranty on Coatings
- This warranty covers the products of WMD Guns for the failure of the NiB-X coating against chipping, peeling, or wear-through.
- The warranty is of unlimited duration. WMD Guns will recoat the product free of charge including return shipping costs.
- This warranty does not cover customer abuse at any time.
- This express limited warranty is the only warranty on this product. This product is sold “as is” and has no implied warranties of merchantability or fitness for a particular purpose.
- There are no warranties which extend beyond the description on the face hereof.
- WMD Guns shall not be responsible in any manner whatsoever for malfunctioning of the firearm, or for physical injury or property damage, resulting in whole or in part from:
- Criminal or negligent discharge
- Improper or careless handling
- Unauthorized modifications
- Defective, improperly hand-loaded, or reloaded ammunition
- Neglect
- Other influences beyond our direct and immediate control
- This limitation applies regardless of whether liability is asserted on the basis of contract, negligence, or strict liability (including any failure to warn).
- Under no circumstances shall WMD Guns be liable for incidental or consequential damages, such as loss of use of property, commercial loss, and loss of earnings or profits.
For questions regarding our warranty, please contact us at techsupport@wmdguns.com.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.