ASG's INFINITY CNC Ultimate Upgrade series Airsoft AEG motors are considered to be among the best motors on the market. Made from the most durable and high quality materials, ASG goes to the greatest lengths (even hand-spinning the coiled, silicon steel rotors) to deliver the best parts on the market. 
Product Specifications:
30,000 RPM Motor for Low Speed, High-Torque Airsoft Builds
Optimized for High FPS Builds and Internal Upgrades
CNC-Milled Hardened Steel Pinion Motor Head Gear (Rated at 50-55 HRC)
Oversized Carbon Motor Brushes for maximum longevity
Internal Ball-Bearing Supports and Balanced Motor Stabilizers minimize wear and tear over extended use
Ported motor housing for superior heat dissipation
Heat-resistant Rare Earth Magnets
CNC-machined covers and shaft for the best durability possible
Short Axle Motor