Pistelle x68 tuning spring / intrubuster gen2

AR Tactical 1.8 mm Performance Tuning Spring
For Mercury Rise IntruBuster Gen 2
Upgrade and fine-tune your IntruBuster Gen 2 with AR Tactical Performance Tuning Springs. Available in two configurations, each spring is designed for a different air source and performance goal.
Choose Your Spring
50 mm × 1.8 mm — CO₂ Configuration
Recommended for customers operating their IntruBuster Gen 2 with a 12-gram CO₂ cartridge in the handle. This spring provides a moderate performance increase while remaining better suited to the pressure characteristics and limited air capacity of 12-gram CO₂.
60 mm × 1.8 mm — HPA Configuration
Recommended for HPA-powered setups. Its additional length creates greater spring preload and is intended for customers seeking the strongest performance configuration with a more consistent external air supply.
AR Tactical Test Results
Testing was performed using an IntruBuster Gen 2, a 12-gram CO₂ cartridge in the handle, and 10 g HAMMER JOULES.