The Holosun 507k/407k MOS Mounting Plate in sleek black is designed for seamless integration with the Holosun 407K and 509T models ensuring a secure fit. Tailored for Glock firearms it is compatible with various models including the Glock 17 19 34 35 40 and 41. Weighing a lightweight 0.2 lbs this mounting plate offers durability without adding bulk making it an essential accessory for enhancing your shooting experience with precision and stability.