The Sylvan Arms GCB100 Magwell Conversion Block 9mm Fits Glock Black Steel/6061-T6 Aluminum is a drop-in magazine well adapter that lets your standard AR-15 lower accept 9mm Glock magazines. Built from durable steel and 6061-T6 aluminum with a black anodized finish, this conversion block installs into most mil-spec lowers much like a standard rifle magazine, providing a solid, reliable interface for pistol-caliber uppers.

This Glock conversion block is ideal for shooters looking to build a pistol-caliber carbine for range use, training, or competition without purchasing a dedicated 9mm lower. It works with popular Glock 9mm magazines such as Glock 17 and Glock 19, and is easy to install and remove when you want to switch configurations. Sylvan Arms’ attention to machining and design delivers a clean, functional upgrade that reflects the brand’s reputation for thoughtful firearm accessories.

Key Features:

• Manufacturer: Sylvan Arms
• Model: GCB100 Magwell Conversion Block
• Caliber: 9mm
• Condition: New
• Type: Conversion Block For AR-15 Lower
• Material: Steel And 6061-T6 Aluminum
• Finish Color: Black Anodized
• Compatibility: Most Mil-Spec AR-15 Lowers, Glock 17 And Glock 19 Magazines
• Design: Drop-In Installation, Does Not Include Last Round Bolt Hold Open
• Weight: 4.2 Oz