Official HPA video workshop · 2:53
MDRX HPA FCU programming
Optional HPA platform only — this does not apply to a stock MDRX AEG.
Safety. Disconnect the air supply and battery before opening or servicing the replica. This programming sequence changes firing behaviour; test safely and obey local field and legal limits.
Procedure
- Enter programming (00:14): in SINGLE, hold the trigger; move selector SINGLE → FULL → SINGLE; release trigger.
- Select a setting: pull the trigger the stated number of times, then validate with SINGLE → FULL → SINGLE. One pull selects firing mode; three selects ROF.
- Correct an entry (01:06): enter an invalid value and validate; five beeps indicate invalid input, then enter the intended value again.
- Exit (01:40): make no trigger pull, validate SINGLE → FULL → SINGLE; three beeps indicate game mode.
- Read memory (01:52): seven pulls selects memory reading; three selects overall counter. Confirm, count beeps, then validate to exit.
Official video
Procedure frames
FAQ
How is programming entered?
Hold the trigger in SINGLE, cycle SINGLE → FULL → SINGLE, then release it.
What do five beeps mean?
The video identifies five beeps as an invalid entry.
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