AceTech Threaded Adapter Set for Bifrost M Airsoft Tracer Units

"Works fine and as advertised.

Note: Buying this plus the bifrost unit (https://www.evike.com/products/50515/) will result in a unit that is a little shorter than the actual unit. It will also not have the flash hider-ish section. However, it will be like around a few dollars more expensive (and slightly uglier) than the original model.

Just get the full version: https://www.evike.com/products/50513/