Action Army AAP-01 Upper Receiver Connector
This adapter is designed for the Action Army AAP-01 and completely shortens your Outer Barrel, by replacing it with this Adapter it gives you a 14mm CCW Thread right at the front of the Receiver, resulting in an extremely compact Pistol or if your feeling daring you can attach the T10 hive suppressor for a statement piece without making the pistol to long.