The Kel-Tec CMR (Carbine Modular Rifle) is a compact, semi-automatic rifle manufactured by Kel-Tec CNC Industries. It is designed for versatile and lightweight use, offering a modular platform for customization. Here are some key features and specifications of the Kel-Tec CMR:

1. Caliber: The CMR is typically chambered in .22 WMR (Winchester Magnum Rimfire), which is a rimfire cartridge known for its relatively high velocity and flat trajectory. Some versions of the CMR may be chambered in other calibers, such as 5.56x45mm NATO.
2. Design and Construction: The CMR features a bullpup design, with the action and magazine located behind the pistol grip and trigger assembly. This design allows for a shorter overall length while retaining a full-length barrel. It typically has a polymer stock and a metal receiver.
3. Barrel Length: The barrel length of the CMR is usually around 16 inches, providing an optimal balance between compactness and ballistic performance.
4. Magazine Capacity: The CMR typically accepts detachable box magazines with various capacities, depending on the specific model and version. It may use proprietary magazines designed specifically for the CMR.
5. Operating System: The CMR operates on a semi-automatic gas piston system. This design helps to ensure reliable and smooth cycling, minimizing fouling and enhancing the rifle’s performance.
6. Iron Sights: The CMR usually comes with adjustable iron sights, including a rear aperture sight with windage and elevation adjustments. The front sight is typically a post sight. Some versions may also feature a Picatinny rail for the attachment of optics.
7. Modular Design: The CMR features a modular design that allows for easy customization and accessory attachment. It may have various accessory rails, allowing the addition of accessories like grips, lights, or laser aiming devices.
8. Safety and Controls: The CMR incorporates standard firearm controls, including a safety lever and a magazine release button. The safety lever is typically located within easy reach of the shooter’s thumb.
9. Weight and Length: The CMR is designed to be lightweight and compact, making it suitable for maneuverability and transport. The specific weight and overall length may vary depending on the specific model and configuration.

It’s important to note that specifications and features can vary across different versions and models of the Kel-Tec CMR. Additionally, it’s crucial to research and understand local laws, regulations, and requirements related to firearm ownership and use, including any restrictions on rifle configurations or specific calibers in your jurisdiction.