The Glock 22 .40 S&W 22-round magazine is a factory-made magazine designed for use with the Glock 22 pistol chambered in .40 Smith & Wesson (also known as .40 S&W). Here are some key details about this magazine:

1. Caliber Compatibility: The magazine is specifically designed for use with the Glock 22 pistol, which is chambered in .40 Smith & Wesson. This caliber is known for its versatility and is used by many law enforcement agencies and civilian shooters.
2. Capacity: The magazine has an extended capacity of 22 rounds, providing a higher ammunition capacity compared to the standard 15 or 10-round magazines that are commonly used with Glock 22 pistols. This extra capacity can be particularly useful for duty use or competition shooting.
3. Construction: Glock factory magazines are known for their durability and reliability. They are typically made from a combination of polymer for the magazine body and a steel spring for reliable feeding.
4. Compatibility: The magazine is designed specifically for the Glock 22 pistol. It may not be compatible with other Glock models chambered in different calibers.
5. Availability: Factory magazines for Glock pistols are generally widely available through firearm and accessories retailers or online vendors that specialize in firearms and firearm accessories.
6. Legal Considerations: Always be aware of and comply with local, state, and federal laws and regulations regarding magazine capacity and firearm ownership. Magazine capacity restrictions can vary by location, so it’s essential to understand and adhere to local laws.

The Glock 22 is a widely used pistol in law enforcement and civilian circles, known for its reliability and robust design. The availability of factory magazines with extended capacities, such as this 22-round magazine, offers shooters more options for various shooting needs, including duty use, competition, and range practice.