APS CAM870 Shell Ejecting Tactical Pump Action Gas Airsoft MKII Shotgun M870 AOW Mechanical Markers this upgrade board comes with Spring Pistols this upgrade board comes with our latest Gen 4 code release which includes: Software Features: Fully trigger programmable Switch on the fly firing mode control Our exclusive "Dual Mode" operation (novice pro) No programming "Hot Start" overrides 4 complete player profiles Tune Assist opreation Rule proof tournament modes Trigger Trainer Mode Automatic Eye Fault BPS override logic Manual Eye On Off Control Forced Shot operation 12 Breakout Modes Hardware Features: 80g mechanical micro switch trigger Ultra bright multi color LED 3 stage Battery Level indicator Tournament Lock switch Audio speaker for feedback and alerts 8 Base Firing Modes: Semi Burst mode Reactive mode Full Auto User Defined Ramping PSP3 NXL Millennium Programmable Adjustments: Eyes On BPS Eyes Off BPS BPS Fine tune Capped Firing Enable Disable Trigger Leading Edge Bebounce Trigger Trailing Edge Debounce Trigger Filtering (AMB) Audio Enable Disable Eye Mode Breech Delay ABS Dwell ABS Reset Time Solenoid Dwell Bolt Return Delay User ramping adjustments (5) Burst rounds Reactive rounds Breakout Mode Tournament Mode Group Firing Mode enabler (2) Auto shut off timer New gated pocket design no inner barrel Identical in exterior design and build quality