The Rost Martin RM1S is a sub-compact striker-fired 9mm pistol with a 3.60-inch match grade barrel and an integrated compensator. It is optic ready with an RMR-compatible cut and a serrated slide, and ships with 15+1 capacity. The frame has a Picatinny rail and the slide features a Black Nitron finish. 
 

Key Specifications 

• Brand: Rost Martin 
• Model: RM1S 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15+1 
• Barrel Length: 3.60 in 
• Color/Finish: Black Nitron 
   

Detailed Features 

• Match grade barrel with integrated compensator for muzzle control 
• Optic-ready slide with RMR-compatible cut 
• Serrated slide for positive grip during manipulation 
• Picatinny rail for accessory mounting 
• Iron sights included

Owners of the RM1S appreciate the match grade barrel and the factory-integrated compensator, which makes a meaningful difference in felt recoil for a pistol this compact. The optic-ready cut and Picatinny rail give it a capable out-of-the-box setup without needing to send the slide out.

Ergonomics get positive marks from those who prefer a sub-compact that still fits confidently in the hand. Carry use is the primary application cited, though some shooters find the integrated comp adds enough length to complicate certain holsters.

Rost Martin is a newer name in the market, and opinions split on long-term reliability expectations. Early adopters report solid build quality and good trigger feel, while others take a wait-and-see approach given the brand's limited track record. Value is generally considered fair given the feature set.