Sylvan Arms GCB100 Glock Conversion Block Magwell 9mm

Description

The Sylvan Arms GCB100 Glock Conversion Block converts a standard Mil‑Spec AR lower to accept Glock‑style 9mm magazines. This drop‑in magwell block installs into the AR magazine well and, when paired with a compatible 9mm AR upper, enables use of Glock 17 and Glock 19 magazines. It features a trigger‑style magazine release for one‑handed magazine changes and an anodized black finish for corrosion resistance.

Key Specifications

• Converts a standard AR lower to accept Glock‑style 9mm magazines.
• Compatible with Glock 17 and Glock 19 magazines.
• Designed for use with Mil‑Spec AR‑15 lowers.
• Constructed of aluminum and steel for strength and durability.
• Finished in anodized black for corrosion resistance.
• Includes a trigger‑style magazine release for single‑handed mag drops.
• Sold in quantities of 1 per box.
• Backed by a limited lifetime warranty.
• Designed, built, and assembled in the USA.

Practical and straightforward, the GCB100 offers a reliable way to convert an existing AR lower for pistol‑caliber use with Glock magazines. Its drop‑in installation, durable two‑material construction, and familiar magazine release make it a sensible choice for builders and shooters who want a clean, functional conversion without altering the lower. The anodized black finish and warranty support add durability and ownership confidence.