M40A3 MC MILLIAN OR M62 BARREL ADAPTER for AIRSOFT

This is a suppressor/barrel adapter for 14mm CCW suppressor for ASG MACMILLIAN M40A3 or M62 DOUBLE EAGLE

For airsoft only of course.

The barrelside is a bit tight, it's been a hard time to find the right thread because it's not a standard ISO thread (21mm)