Sixmm Product Reviews feature the MCX Folding Stock M4 Adapter made by the Airsoft Artisan in this video. The MCX Folding Stock M4 Adapter (Part No.: SIX-800) is a CNC-machined adapter constructed from durable aluminum and steel, allowing you to install standard AR15/M4 stock tubes onto your firearm. Compatible with any M1913 Picatinny stock adapter, this adapter is finished with a durable anodizing or QPQ coating for enhanced protection and aesthetics. Weighing in at a mere 240g, this adapter offers a lightweight and reliable solution for customizing your firearm with a folding stock.