Hi, first post! So I bought this M4 lookalike the other day, seems solid, looks good and has a decent rate of fire. I'm just looking at getting started with airsoft. But out of the box, even with hop up, it will only shoot about 15-20 metres before the pellets hit the ground. Yet in other video reviews I've seen online of the same gun, the distance and accuracy are far better. Charged the battery for 4 hours. Any thoughts/suggestions? Cheers!