Hay guys recently I picked up an old cm047c ( ak74m) about 5 years old from a friend. It was in pretty rough shape. I wrapped some 550 and tightened body screws. Once the externals were pleasing I moved on to the internals. I removed the gearbox, polished it, re-lubed it, installed a homebuilt mosfett and then replaced the gearbox back in the body. I ordered a tienly f5000 motor from airsoft gi along with a madbull black python and h hop nubs with a systema bucking. Put them all in and the results are amazing! I am making 250' shots easy. I've never seen an AEG shoot like this. It outshoots my kwa m16 with a madbull python. I don't understand why its shooting so well. Does anyone have any incite? Is the Ak design hop up that much better? I'm pleased but confused. Also what should i do to keep increasing range. Mind you I'm still using the stock spring. ~380 fps with .2's. I've been using ASGI .25's.