Take your ATM gel blaster to the next level with the Umbral® ATM Steel Gear Set. Designed and engineered by STARIVER®, this professional-grade gear set delivers exceptional durability, precision, and performance for serious gel blaster enthusiasts.

Crafted from high-strength steel using full CNC machining, these gears feature a Rockwell hardness of 40–45 HRC — built to withstand the stress of high-power setups while maintaining smooth, reliable operation.

Key Upgrades & Performance Benefits

• Precision Magnet Position Correction Optimized fire control sensor placement solves single-shot reset issues and raises your rate-of-fire limit.
• Water-Drop Tooth Position Correction Improved piston release timing and better piston-to-BOLT fit for superior initial velocity consistency.
• CNC Spiral Bevel & Crown Gears Combines the quietness and high-torque advantages of spiral teeth with straight-tooth vertical meshing for perfect compatibility.
• Dynamic Balance Calibration Significantly reduces centrifugal force during high-speed rotation, lowering vibration and dramatically extending gearbox shaft life.
• High-Power Spring Compatible Rated for springs up to M180, making it ideal for high-performance builds.

Product Specifications

 

Specifications:

Brand: stariver.
Material: stainless steel.
Color: black.
Compatibility: atm gearboxes.
Package includes: 1* set of atm gearbox metal gears.