The Rost Martin RM1S is a sub-compact 9mm pistol with a 3.6-inch barrel. The slide has a nitrocarburized black finish and the pistol is optics-ready with an RMR mount plate. Magazine capacity reaches 17 rounds with available magazines. 
 

Key Specifications 

• Brand: Rost Martin 
• Model: RM1S 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 3.6 in 
• Color/Finish: Black (Nitrocarburized) 
   

Detailed Features 

• Optics-ready slide with RMR mount plate included 
• Nitrocarburized black finish 
• Sub-compact frame 
• White dot front sight, black serrated rear sight 
• Available with 15-round and 17-round capacity magazines

Owners of the Rost Martin RM1S frequently note the optics-ready setup as the main draw, with the included RMR mount plate making it a practical buy for those planning to run an optic. The nitrocarburized finish is well-regarded for its durability. The sub-compact frame suits everyday carry, though some find the grip too abbreviated for comfortable range work without an extended magazine.

The trigger on the RM1S splits opinion. Most describe it as serviceable rather than exceptional, and the reset distance is the most common criticism from those who train seriously. The serrated rear sight and white dot front combination draws consistent approval as a practical out-of-the-box setup.

Rost Martin is a newer manufacturer, and buyer sentiment sits at cautious optimism. Those who have put the RM1S through regular use report consistent function. More conservative buyers prefer to let the brand build a longer track record before trusting it for daily carry, which is a common reaction to any newer entrant in the pistol market.