Sweetwater Precision Weapons (SPW) is a fictional Weapons company, the Operator series features conversions of existing weapons and new weapons according to the customer's wishes.
The client demanded a support rifle for close quarter battles. It had to be relatively light and manoeuvrable, and it had to have a high ammo capacity. The gunsmiths of SPW created the Close Quarter Support Rifle, short CQSR. To achieve high manoeuvrability in confined spaces, the CQSR was conceived and built as a bullpup gun. It featured a high capacity ammo box, a skeleton trigger, an ergonomic grip/foregrip combo, a rail raiser and a RDS.
Credit to Beck for the shaded rails and to SJCommander for the foregrip idea.
Done in PMG 0.6.