Hello
@RendoirS,
LRPS and AMS are extremely rare and therefore usually rather extortionate to purchase off of other players using the forums Buy/Sell gear sub-topic. However, players accumulate such scopes in game via robbing the Armed Response branch of the police or the Designated Marksman Unit branch of the UNNC. Now you are possibly wondering how do you know who is who? Well, Armed Response wear a greyish suit, a balaclava and a combat helmet, these are the primary pieces of clothing for Armed Response. Now, the UNMC. DMU only has around 7-9 members at one time, therefore seeing one of these guys is very scarce, added to the fact that if you see one UNMC soldier (Dressed in DMU gear) on his own there are most likely 10-20 other soldiers around. But that decision is up to you: UNMC DMU are distinctive by their Khaki Boonie hats they wear whilst using the gear, if you successfully rob one of these guys not only may you find an LRPS or AMS in your hands but also a lovely Black MK-1 (Usually not all the time sometimes they use other firearms.)
I hoped this answered your question!
Good luck, you'll need it
Jack Shepherd.