The UNIT4® MK16 AR15-style training rifle is unmatched in size, weight, realism, and performance. The system combines the realism of a live rifle with the freedom to train anywhere. You get the same proven free-float barrel design, durable aircraft-grade aluminum construction, and an uninterrupted upper rail platform with Mil-Spec 1913, plus M-LOK attachment points along the handguard and integral QD swivel attachment points on both sides!

The UNIT4® Rifle has been purpose-built to provide safe and realistic firearms training in any environment.

Train At Home: The UNIT4® is the ultimate training enabler, allowing users to practice basic marksmanship, train new shooters or engage in force-on-force scenarios in their home, garage, basement or yard. 

Feels Like Your Real AR: The UNIT4® has the same fit, form, function and fidelity as a live AR, including realistic recoil. It is compatible with off-the-shelf AR accessories, so you can set up a true 1:1 trainer with the same touchpoints as your live AR.

100% Safe Platform: The UNIT4® is a dedicated training platform, has been classified as a non-firearm by the ATF and cannot chamber a live round. It can be safely used with eye protection and ships via normal mail straight to your home without an FFL.

Built To Last: Upper and lower receivers forged from aluminum. Real steel internals made in USA with same materials and processes built into live ARs. Our magazines can be dropped onto any surface. All UNIT4® Rifles and Magazines are protected by our industry-leading 5-Year Warranty.

Lower Receiver: Mil-Spec with Rear Receiver QD Swivel Attachment Point. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized

Upper Receiver: Mil-Spec with Indexing Marks. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized

Barrel (Outer): Chrome Moly Vanadium Steel, Mil-Spec Heavy Phosphate Coated.

Barrel (Inner): Nickel plated, smooth bore, brass tube for 8mm Rounds

Charging Handle: Mil Spec with Right Latch

Selector: Ambidexterous; Safe, semi & full

Receiver Extension: 6 Position Mil-Spec 7075-T6 Aluminum

Caliber: 8mm

Muzzle Thread: 5/8" x 24 TPI (Threads Per Inch)

Gas System: CO2

Barrel Length: 16"

Magazine: UNIT4® Magazine

Manufacturer: UNIT Solutions

Magpul MOE SL Grip & Stock:

• Magpul MOE SL Grip: Similar to the MOE-K2, the MOE SL Grip (MOE Slim Line) is a drop-in upgrade for AR15/M4 pistol grips with a more vertical grip angle optimized for short LOP weapons that bring the primary hand in closer to the shooter's body.
• Magpul MOE SL Stock: The MOE SL Stock – Mil-Spec Model (MOE Slim Line) is a drop-in replacement buttstock for AR15/M4 carbines using Mil-Spec sized receiver extension tubes. Designed for the modern battlefield, the sleek profile, dual-side release latches, rolled toe, and angled rubber butt-pad are optimized for use with body armor or modular gear and provides for efficient shoulder transitions.

Magpul MOE-K2 Grip & CTR Stock:

• Magpul MOE K2 Grip: Similar in concept to the MOE-K, the MOE-K2 is a drop in upgrade for the AR15 / M4 that offers a more vertical grip angle, but in a full-size grip design. The steeper vertical grip angle is optimized for use on PDW (Personal Defense Weapon) configurations and improves comfort and control on short LOP rifles that bring the primary hand in closer to the shooter's body.
• Magpul CTR Stock: The Magpul CTR (Compact/Type Restricted) – Mil-Spec model is a drop-in replacement buttstock for AR15 / M16 carbines using Mil-Spec sized receiver extension tubes. Designed for light, fast action, the streamlined A-frame profile avoids snagging and shields the release latch to prevent accidental activation.

Primary Arms SLx MD-21 Push Button 21mm Microdot with AutoLive - 2 MOA Red Dot Reticle: The SLx MD-21 is an advanced micro dot sight that incorporates the latest technologies and materials to deliver exceptional CQB performance. Weighing only 5 ounces, the SLx MD-21 is both lightweight and rugged, featuring upgraded mounting hardware for guaranteed rigidity and precision when you need it most. The upgraded LED emitter offers complete night vision compatibility as well as a true Red Dot Bright™ reticle with an ultra-long runtime for full operability in any environment. Additionally, the Autolive technology shuts off the reticle when no motion is detected for two minutes and immediately turns on as soon as you pick it up.

EOTech XPS-2: The HWS XPS2™ is the non night-vision version of our shortest and lightest HWS sight so far. The CR123 lithium battery configuration of the XPS2 provides additional rail space, leaving more room for rear iron sights or magnifiers. Also offering water-resistant capability up to 10 feet, the XPS2 is a great compact and lightweight option for your platform.

Viridian Venta Green Dot: The Viridian Venta 1x20mm 3 MOA Green Dot Sight (#981-0159) offers shooters a versatile and reliable optic for rapid target acquisition. Designed with a 3 MOA green dot reticle, this sight provides precision aiming for rifles, and its IPX6 waterproof rating ensures it performs even in challenging weather conditions. The sight features fully multi-coated optics for enhanced clarity and brightness and includes an unlimited eye relief, making it ideal for fast shooting scenarios.

Magpul Iron Sights:

• MBUS 3 Sight - Front: Significantly reduced in size from the MBUS, it sits at just 0.47” high when folded, 1.38” at its widest point, and weighs a scant 25 grams with hardware. Its aesthetics are derived from the MBUS Pro, but the MBUS 3 Front Sight is constructed of our impact-resistant polymer, making it lightweight and extremely durable. Featuring the same spring-loaded technology as its predecessor, they can be deployed with an ambidextrous push-button.
• MBUS 3 Sight - Back: Significantly reduced in size from the MBUS, it sits at just 0.55” high when folded, 1.38” at its widest point, and weighs a scant 30 grams with hardware. Its aesthetics are derived from the MBUS Pro, but the MBUS 3 Rear Sight is constructed of our impact-resistant polymer, making it lightweight and extremely durable. Featuring the same spring-loaded technology as its predecessor, they can be deployed with an ambidextrous push-button.

Blue Can Mini: If your suppressor is less than 6", go with the mini length blue can. This version has the large mount compatible with the UNIT4's standard flash hider.

Blue Can Full (5.75"): If your suppressor is more than 6", go with the full length blue can. This version has the large mount compatible with the UNIT4's standard flash hider.

Huxwrx 5.56 NLTA & Muzzle Brake:

• HUXWRX 5.56 NLTA: A precision-engineered non-lethal training aid designed for professional end-users who demand realistic handling during training. Closely matching the size, balance, and feel of a live HUXWRX suppressor, the NLTA allows shooters to maintain proper balance, sight picture, and muscle memory without live fire.
• Huxwrx Muzzle Brake - QD 338 5/8x24: Specifcially designed for use with the UNIT4 Training Rifle, this larger bore diameter allows you to install the 5.56 NLTA.

• How-To Videos
• Spec Sheet
• Manuals
• Patents

We are so confident that you will love the UNIT4 Training System that you can try it risk-free and return it to us free of charge within 30 days of purchase.