The Rost Martin RM1C Black OSP is a 9mm striker-fired pistol with a 4-inch barrel, a polymer frame and a matte finish. The listing describes it as compact and optic ready, with an accessory rail and an ambidextrous magazine release. Two magazines are listed with it, one holding 15 rounds and one holding 17.

Condition is a conflict in the source data: the listing specs state Used, while the supplier text says NEW and uses a stock photo. Both are stated here. The configuration suits a buyer who wants an optic-ready compact 9mm with a rail for accessories, and the two listed magazine sizes give a choice of capacity. The optic-ready slide accepts a compatible optic, and the polymer frame carries the accessory rail.