Deep Fire has put together a new innovative hop-up system for M4 AEGs that transforms your standard AEG hop-up system to a similar system used in Systema PTWs. It does not use a traditional bucking or nub instead uses a totally different system including the inner and outer barrels. The added benefits are as follows.
-Very high quality components machined aluminum
-Incredible consistency both with FPS and with accuracy compared to standard M4 AEG hop-ups
-Keeps its setting without slipping unlike the traditional M4 hop-up unit
- Different design which makes this system more reliable