MGI MARCK-15 Hydra 5.56 NATO AR-15, 16-Inch Barrel, 1:9 Twist, Modular Magwell, Carbine Gas, MFT Stock, Magpul MOE Handguard
The MGI MARCK-15 Hydra stands out for its modular lower receiver with interchangeable magazine wells. This 5.56 NATO example features the AR-pattern magwell marked "AR MAG WELL," a 16-inch barrel with 1:9 twist, and a carbine-length gas system. It pairs a flat-top upper with a Picatinny rail, an A2 front sight base, and a detachable A2-style rear sight, with modern furniture from Mission First Tactical and Magpul.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape overall. Minor, superficial scratches and blemishes are present on exterior surfaces.
What’s Included
- 1x Magpul PMAG GEN M3 windowed polymer 30-round magazine for 5.56x45
- Detachable A2-style rear sight (installed on receiver rail)
- Mission First Tactical Battlelink Minimalist (BMSMIL) adjustable stock (installed)
- Magpul MOE carbine-length handguard with short accessory rail segment (installed)
- Magpul pistol grip (installed)
- Cylindrical multi-port brake/compensator (installed)
The Hydra system’s modular lower receiver accepts interchangeable magazine wells, and this rifle is equipped with the AR-pattern unit marked "AR MAG WELL." This design lets the platform adapt to different magazine standards when configured with compatible components.
The 16-inch barrel is chambered in 5.56 NATO with a 1:9 twist, balanced for common bullet weights. A carbine-length gas system and a pinned A2 front sight base with bayonet lug and front sling swivel deliver a classic, proven layout. A cylindrical multi-port brake/compensator is installed at the muzzle.
Furniture is modern and lightweight. The Mission First Tactical Battlelink Minimalist stock provides adjustable length of pull, and the Magpul pistol grip offers a secure hold. The Magpul MOE carbine-length polymer handguard includes a short accessory rail segment.
The flat-top upper receiver features a Picatinny rail and comes with a detachable A2-style rear sight. The rifle uses a direct-impingement, semi-automatic action with a manual safety. Receivers are aluminum alloy with a black finish, built on the AR-15 platform in the USA. Capacity is 30+1 with the included windowed PMAG.