https://m.flickr.com/#/photos/138730...7665969165966/
Northridge international is selling these on their eBay page for $20, so I decided to take a chance on one, see if I can get a flash hider to fit. Anyone order/have one and use a flash hider on it? Any idea where these originated from, and for what purpose? The one I got looks very well constructed, haven't checked the thread pitch yet though.