Stu of Patrol Base offers an overview of the Gate Arcturus Trinity Armament M4 HPA airsoft rifles, which are high-pressure air systems that come pre-built and ready-to-use straight out of the box. These rifles incorporate the Gate D Pulsar HPA engine and the advanced Titan 2 Bluetooth control system, available in 7.5, 12, and 15-inch lengths, all built with a lightweight aluminum receiver and M-LOK rail.

A key feature is the electronic bolt stop enabled by the Titan 2, which allows the user to program a round count (e.g., 30 rounds) after which the rifle stops firing, simulating an empty magazine until the bolt catch is pressed. While the system is highly adjustable for FPS and rate of fire, the reviewer issues a critical warning: only a 7.4V battery can be used, as an 11.1V will cause irreparable damage to the Pulsar engine.