No products
Reinforced ÆTHER™ V2 gearbox shell with 8mm bearings from Specna Arms in black.
Premium base for PRIME™ M4 and MK18 rifles.
Inspection window for AOE and body-centering capability.
Designed for high stress.
Patented reinforced shell.
Compatible with M135+ springs without risk of cracking.
8mm J-Cage bearings.
SPARMS377
TDC Magnus™ M4 Hop-Up Chamber and Helium™ Flat Bucking from Specna Arms in black. For AEG airsoft rifles M4, M16, AR15, MK18, HK416 and others. Precise TDC pressure for maximum accuracy. Helium™ Flat bucking without a nub. Stable BB rotation even with heavier ammunition.
Looking for a gearbox shell that can withstand serious stress? Need an upgrade gearbox that can handle M135 springs while offering clever structural features? ÆTHER™ V2 from Specna Arms represents the peak of their technical development. This gearbox is part of the premium PRIME™ series and is built to resist strong springs and long-term load without deformation or cracking. A unique advantage is the combination of 8mm J-Cage bearings. The motor and sector gear run on ball bearings, while the spur gear uses a bushing to increase durability where the gearbox needs it most. The construction includes an inspection window for checking AoE, the option for trigger travel adjustment and a reinforced front section. If you want to build a powerful, fast or ultra-reliable AEG on the V2 / AR15 platform, the ÆTHER™ shell gives you a stable and dependable base.

AETHER gearbox shell with labels
| Color | Black |
| Weight (g) | 333 g |
| Body/receiver material | Metal |
| Gearbox version | V2 - ESA2™ |
| Bearings (mm) | 8 (mm) |
| Bearings (material) | Metal |