Hello everyone! I just bought new P99 DAO AEP from airsoft store. It is poweeed with AAA batteries. So I bought new batteries and I put them iside in correct order but gun still cant shoot. It is weird because it will occasionally work maybe 5 times in 50 tries. Blowback barrel only moves few milimeters back and it makes strange noise as if engine or whatever has no enough power. I tried with different batteries it still didnt work and solutions ?