The Rost Martin RM1C Comp is a compact 9mm semi-automatic pistol with a 4-inch barrel and 15+1 capacity. It pairs a polymer frame with a steel slide and comes finished in black for a low-profile look. The RM1C name places it in Rost Martin's compact lineup, built for concealment and everyday carry rather than range-only shooting, and it suits training use as well. 
 

Key Specifications 

• Brand: Rost Martin 
• Model: RM1C Comp 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4 inches 
• Finish: Black 
• Frame Material: Polymer 
• Slide Material: Steel 
   

Detailed Features 

• Polymer frame keeps the pistol light for daily carry 
• Steel slide is built for the durability expected of a compact carry gun 
• 4-inch barrel balances a compact footprint with enough sight radius for practical accuracy 
• 15+1 capacity gives a useful round count for a compact-size 9mm 
• Black finish keeps the profile low-glare and understated 
• Compact dimensions make the RM1C Comp a reasonable fit for concealed carry holsters sized for similar 9mm pistols

Owners of compact polymer-framed 9mm pistols like the RM1C Comp tend to focus first on whether the gun runs cleanly. Feedback on newer platforms takes time to build, and buyers often watch how the slide-to-frame fit holds up with regular use. A steel slide on a polymer frame is a well-understood combination, and shooters generally trust it once they have run a batch of ammunition through without a hiccup.

For carry use, the compact grip and 4-inch barrel put the RM1C Comp in a size class shooters expect to conceal comfortably under a cover garment. Some owners want more texture on the grip for a firmer hold during longer range sessions, but that complaint is common across the compact carry category and not specific to this model.

Value is often the deciding factor for buyers trying a newer brand. RM1C Comp owners weigh price against the aftermarket support offered by more established compact 9mm lines, and holster or magazine availability can lag behind mainstream models. Owners who make that tradeoff usually say the fit and finish justify it.