The Atom Smasher Trigger System (ASTS) for the T-Series Marker: Gen1, Gen2, Gen3, Gen4, Gen6, Gen7. It has Interchangeable grip for easy upgrade and smooth firing mechanism.
This is the real thing! Used on the M4 and installs in less than 1 minute!
- Atom Smasher Trigger System (ASTS)
- M4 Rubber Pistol Grip (black, olive drab, tan)