Hello Guys, I have been doing some research but I still would love some advice from some vets in the area. Currently I am running a TM- PRO- VSR10 with a EDGI kit which I installed. I want to build a nice electric DMR type of weapon for when I want to change up my play style or have a buddy that I want to play with me. I plan to spend around $600-$700 on a good build. What I want in my gun FPS 450 (legal Limit on most field in the US I believe) Semi Auto Only M4 Platform Medium weight Unique Look Here are my questions: Should I start from scratch or buy pre-made to build off of? Ideal inner and outer barrel length? Which gear box to look at and why Brands to stay away from Any useful forums on the matter as I literally have 0 experience Two parts I wanted to buy because they looked cool xD APS 10" Guardian RIS Handguard Set for M4 / M16 Series Airsoft AEG Rifles (Color: Black) G&P CNC Aluminum Outer Barrel for M4 / M16 Series Airsoft AEG Rifles (Length: 17.5" / Simpled) Thank you for your time!