Sir, only 1-unit left of the APS M4 all metal with Electric Blow-back. You better prepare around P12K for this gun since stock unit is only 300-310 fps and as mentioned before, no battery and charger at 7.5K. Upgrade, battery and charger would cost an additional of 4-5K depending on the brand of parts that you would want installed.
We also have an AK Electric Blowback at 7.5K (no battery and charger) but fires at 390-400 fps. Its metal and real wood. You will just need to add Php1.6K for the battery and charger.