The Nuprol PTW M110 Spring is a replacement or upgrade main spring designed for PTW/CTW/Katana series airsoft AEG rifles, giving your replica a reliable power source and influencing its muzzle velocity and range. It’s part of Nuprol’s line of springs tailored for Professional Training Weapon (PTW) platforms, where consistent performance and durability matter for both field play and training scenarios.
 
Product Overview
This M110‑rated spring is engineered to deliver medium‑power output — typically propelling 6 mm BBs to around the 360 fps range with a 0.20 g BB in compatible setups (actual performance will vary depending on hop‑up, inner barrel length, air seal, and overall build). It’s suitable for players looking to maintain a solid balance of range and impact energy for outdoor games while staying within many local field limits when used appropriately.
 
Key Features
M110 Power Rating: Designed to produce approximately 360 fps (about 110 m/s) with 0.20 g BBs, offering a significant boost in power over lower‑rated springs. Actual velocity depends on your specific setup and tuning.
PTW/CTW/Katana Compatibility: Fits Professional Training Weapon (PTW) style AEG platforms and comparable CTW/Katana systems that accept standard PTW‑type springs.
High‑Quality Steel Construction: Built to withstand repeated compression cycles typical in PTW gearboxes, helping ensure consistent performance and durability over time.
Easy Upgrade or Replacement: Ideal for replacing a worn spring or enhancing your rifle’s power for longer range and stronger hits during outdoor play.