If you live in a state with restrictive hunting laws and need to use a straight wall cartridge, the Dirty Bird 16″ GUNNER Carbine 350 Legend M-LOK Upper Assembly is the perfect solution. We wanted to make a durable, lightweight, and affordable upper for one of the most exciting calibers right now, 350 Legend. All of this was predicated on the right choice of barrel, which is why we went with the very popular Faxon Firearms 16″ GUNNER 350 Legend Carbine 4150 Nitride Barrel. This build will include one of Dirty Bird’s enhanced BCGs, which are individually High Pressure Tested and Magnetic Particle Inspected to ensure flawless operation in any AR-15 platform rifle or pistol.
Faxon Firearms 16″ GUNNER 350 Legend Carbine 4150 Nitride Barrel
- Barrel Material: 4150 CMV
- Barrel Type: Button Rifled
- Barrel Caliber: 350 Legend SAAMI
- Barrel Twist: 1:16
- Barrel Length: 16”
- Barrel Profile: Gunner
- Barrel Gas System: Carbine
We added one of the nicest A2 Flash hiders that you could find for a 9mm Carbine to reduce muzzle flash.
The upper is then built on a top-tier 7075 forged upper receiver, and fitted with a Dirty Bird SMRS V2 Handguard. Key features of this handguard include:
- Patented ASAL (Anti-Slip, Anti-Lift) mounting system
- Included M-LOK QD Mount
- “Competition Cut” top rail with M-LOK slots machined into the shaved portion.
This upper ships with an MOA Guarantee and is covered by the Dirty Bird Limited Lifetime Warranty.
Bolt Carrier Group
- Designed for use with .350 Legend
- Strategically relocated load bearing surfaces reduce carrier tilt/can’t during recoil, thus increasing reliability and longevity
- Additional wall thickness in the gas exhaust port area for added strength and rigidity
- High Pressure Tested and Magnetic Particle Inspected
Charging Handle
- Mil-Spec Style
- 6061-T6 Billet Aluminum
- Smooth Operation and Positive Grip under Extreme Conditions
- Type 3 Class 2 Hard Coat Anodizing
Dirty Bird Industries — Premium AR-15 and AR-10 Components, Built to Last.
Designed for builders who demand uncompromising quality, reliable performance, and accessible pricing without the premium markups common from larger brands.
Founded by Builders, Built to Last
Founded in 2015 by brothers Jay and Dustin Pitcher in a Bakersfield, California garage, Dirty Bird Industries started as a family-owned operation specializing in custom Cerakote finishes and high-quality AR parts. Building on experience from its sister site, AR15Discounts.com, Dirty Bird Industries has grown into a nationwide company with a dedicated team focused on American-made gear that shooters trust.
American-Made Quality and Precision
Through strategic partnerships with leading domestic manufacturers, Dirty Bird Industries sources and develops components using advanced CNC machining, rigorous testing, and mil-spec standards. By managing larger volumes, the company delivers proven, high-end materials and precision engineering at fair prices that meet the high standards set for its own builds.
Proven Components for Serious Builds
Standout offerings include precision-forged 7075-T6 upper and lower receivers, enhanced black nitride bolt carrier groups, single-stage nickel Teflon triggers, free-float M-LOK handguards, complete upper assemblies, and comprehensive lower parts kits. These products create a cohesive selection for everything from custom builds to high-performance rifles nationwide, supported by batch inspections, mil-spec compliance, and ongoing innovations.
Zero Risk Guarantee Program
For total confidence, Dirty Bird Industries backs eligible parts and accessories with its Zero Risk Guarantee Program. This includes free shipping on orders over $50, package protection up to $5,000, lifetime free returns with full refunds within 45 days or store credit after, and expert support. As passionate shooters, the team at Dirty Bird Industries stands behind every product because the company builds, tests, and uses them too, providing authentic value and dependable gear.

