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Rost Martin is a Dallas, Texas-based company that only came onto the scene in 2024, but they hit the ground running. The RM1S Comp is their subcompact striker-fired 9mm, and this special bundle version comes fully loaded with the Viridian RFX11 green dot already mounted, four magazines (one 12-round flush-fit and three 15-round extended), and a Savior pistol bag. It's a ready-to-carry setup that doesn't ask you to go spend more money before you head to the range.
The standout feature here is the compensation system. Rost Martin cuts both the barrel and the slide, so propellant gases get vented upward from both simultaneously. Reviewers who've put rounds through this gun consistently note that the muzzle stays flatter than most compensated pistols they've shot, which is a real advantage in a gun this compact. The hammer-forged match barrel is crowned and rated for accuracy, and the steel slide wears a nitride finish with front and rear serrations plus anti-glare top cuts that keep reflections from messing with your sight picture. The frame is polymer with a Picatinny rail up front for a light or laser, and the grip includes modular backstraps so you can dial in the fit for your hand size. Textured index points sit on both sides of the frame where your thumbs naturally land, helping you drive the gun during recoil rather than just holding on.
The included Viridian RFX11 is a purpose-built carry optic. It weighs almost nothing, runs on a CR2032 battery rated for up to 30,000 hours, and uses an ambient light sensor to automatically adjust the 3 MOA green dot brightness without any manual input. It snaps into the RMR optic plate that's already installed on the slide, and it sits low enough that the factory iron sights are still usable if needed. Green is genuinely easier for most eyes to pick up quickly, especially in mixed or changing lighting, so this isn't just a marketing choice. The trigger on the RM1S breaks cleanly with a short reset, controls are fully ambidextrous, and the magazine well is funneled for faster reloads under stress. At just under 20 ounces unloaded with the flush magazine, this is a gun you'll actually carry all day without noticing it.
Yes, Rost Martin has confirmed the RM1S Comp is compatible with standard RM1C holsters, which gives you a wider selection of holster options to choose from. The RM1S is sized similarly to a Glock 26 or S&W M&P9 Subcompact, so Glock 19-pattern holsters have also been reported to fit it well in practice.
The slide is cut for RMR-pattern optics, and an RMR optic plate is included in the box. The bundle also ships with the Viridian RFX11 already mounted, which uses a Shield RMSc footprint via the included plate. Additional mounting plates for other footprints are sold separately as Rost Martin accessories.
Quite well by subcompact standards. Unlike many compensated pistols that only port the slide, the RM1S Comp cuts both the barrel and the slide, venting gases from both simultaneously. Testers who've run it extensively report noticeably flatter muzzle movement compared to other comped handguns, which translates to faster, more controlled follow-up shots. There is some added muzzle flash at the port, which is the trade-off you accept with any compensator design.
The RFX11 sits low on the slide thanks to its compact Shield RMSc-style footprint, and the iron sights remain visible and usable with the optic mounted. The factory irons on the RM1S use the Springfield XD sight footprint, so aftermarket upgrades are easy to find if you want taller suppressor-height sights for a more traditional co-witness.
The 15-round magazine extends the grip slightly, adding about a half inch and giving your pinky finger a full purchase on the frame. Rost Martin includes a grip sleeve on the extended magazine to prevent over-insertion and make the transition between mag sizes feel seamless. Many people find it practical to carry with the flush 12-round magazine loaded in the gun and the 15-rounder as a reload.
Yes. Rost Martin is based in Dallas, Texas, and all parts are made in the USA. The company was founded by a Marine Corps veteran and his wife, who has deep roots in the American firearms industry. The RM1S Comp is manufactured to solid fit-and-finish standards, and multiple independent reviews have noted no tool marks or quality issues on the guns they've tested.
| UPC | 850067485810 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | RM1SBLKOSP(COMP)SPL |
| Action | |
| Barrel Length | 3.6" |
| Caliber/Gauge | 9mm |
| Capacity | 12 + 1 |
| Color | Black |
| Model | |
| Product Type | Striker Fired |
| Shipping Weight | 4.9 |
| Sights | Iron Sights |
| Slide Description | Integrated Compensator/Serrated w/Optic |
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