The Rost Martin RM1S is a sub-compact striker-fired pistol chambered in 9mm Luger with a 3.60-inch match grade barrel. This CA compliant bundle includes a Viridian RFX-11 green dot optic and ships with four 10-round magazines. The frame is black polymer with an optics-ready slide. 
 

Key Specifications 

• Brand: Rost Martin 
• Model: RM1S 
• Caliber: 9mm 
• Action: Striker-Fired 
• Capacity: 10+1 
• Barrel Length: 3.60 in 
• Color/Finish: Black 
   

Detailed Features 

• 3.60-inch match grade barrel 
• Optics-ready slide with Viridian RFX-11 green dot included 
• California-compliant configuration with 10-round magazines 
• Ships as a bundle with four 10-round magazines 
• Sub-compact frame size

Owners of the RM1S generally appreciate that Rost Martin shipped a ready-to-run bundle with the Viridian RFX-11 already mounted. Getting the optic included at the purchase price is a recurring point of satisfaction, especially given the CA compliant magazine count.

The sub-compact size draws the usual trade-offs. Shooters with larger hands note that the grip is short, and recoil with the compact slide can feel snappy compared to full-size options in the same caliber. The match grade barrel does get positive mentions for accuracy at typical handgun distances.

The RM1S is a newer name in the market, and opinions on long-term reliability are still forming. Early adopters report clean cycling through the break-in period, though the brand's limited dealer footprint means finding support or accessories requires some extra effort compared to more established platforms.