Sylvan Arms Glock Conversion Block 9mm Black Magazine Adapter for AR-15

The Sylvan Arms GCB100 Glock Conversion Block is a magazine adapter for AR-15 platform rifles that allows the use of Glock 9mm magazines in a Mil-Spec lower receiver. It installs in place of a standard rifle magazine, so the lower can run 9mm ammunition without a caliber-specific pistol-caliber option.

The block is machined from aluminum with a steel component and finished in black anodized coating. It is designed to fit Mil-Spec AR-15 lowers and accepts popular Glock 9mm magazines. The adapter is a drop-in part for easy installation and swapping.

The package covers the conversion block only. It does not include a last round bolt hold open feature, so the bolt will not lock back on an empty magazine with this part alone.

• Brand: Sylvan Arms
• Model: GCB100
• Platform: AR-15
• Caliber: 9mm Luger
• Fits: Glock 9mm magazines in Mil-Spec AR-15 lowers
• Color: Black
• Finish: Anodized
• Material: Aluminum/Steel