The Acetech Blaster is on the way and on preorder at the moment. This adapter provides a simulated muzzle flash and tracer function. Airsoft Mike has also posted a review video of the Blaster which you can see below.
Priced at 72USD Acetech lists the product features as:
• Blaster simulates muzzle flash, the effect of flame depends on volume of gas or water fog around the muzzle, with more volume, effect will be better.
• Three modes available: Tracer with flame, Flame only, Tracer only.
• Intelligent power control: Blaster power on by shaking, enter sleep mode while idle for over 5 minutes.
• Suitable for standard airsoft and gel BBs.The tracer function: Supports green tracer BBs and water BBs, not support red tracer BBs.
The flame function: Supports all kinds of BBs, different color of BBs will have subtly different flame color.
Acetech