Drop-in gearboxes seem to be popular these days (HPA or regular AEG). The MODIFY Torus Reinforced Gearbox Ver.3 is now available! Most of features succeeded from the well known Torus Reinforced Gearbox Ver.2. but with several additional features as shown below. The Ver. 2 gearbox is a rock solid gearbox which can handle high FPS forces, also this Ver. 3 gearbox will handle high FPS with ease. However these top notch gearboxes will come with a heavy price...

The additional features of the Ver. 3 gearbox are:
Interlocking design and Reinforcement
Modify Torus enhanced Motor Mount set
Modify Stopper Rail for Ver.3 (except AUG)
*The gearbox plate has three wire clips built in to protect the harness
*Larger detent on gearbox for more positive locking on the stopper rail.