I would say my favorite weapon is the "Cyrus" marksmanrifle. It loads 9.3x64 and is extremely dangerous. Semi automatic, so it has crazy dps. High damage and high fire rate as a dmr. It's amazing! Quite expensive though and not super common. As of scopes i always go with two, just in case. Close to medium / high = "DMS" It's 2x-4x + reflex on top. Very Long range = "LRPS" 6x-25x + High zeroing range. IF YOUR SERVER has it enabled, it's quite op so not all servers do. Then i would use what i frequently used in this video, which is the "Nightstalker" - it has a built in rangefinder which makes it unique. Super quick to zero in. - 4x-10x so you can engage in both medium to long. ( Close up in a pinch ) - It has four modes. Normal day, orange/red-hot thermal and night vision modes. ( thermal is usually removed from most servers ) So in short. Cyrus + DMS + Nightstalker I also recommend the "Mk-I EMR" which is a dmr, high fire rate and loads 7.62×51. So it's quite deadly but usually not that expensive or hard to find. ( Same scope setup ). I usually go for this until i can find a cyrus. Hope that helps :)
Just download this: a3launcher.com/ You launch the game via this launcher. When you pick a server you might like. Once you try to join it will prompt to download all mods you would need. Super easy, barely an inconvenience!