Rost Martin RM1C 9mm 4″ ODG 10+1 Optic Ready
Pros & cons
What works
- Optic cut includes machined recoil lugs—prevents plate shift that can shear screws on Glock MOS plates
- Weighs 23.8 oz unloaded—3.2 oz lighter than comparable Glock 19 Gen5 MOS
- Hand-fit barrel with .003-inch chamber clearance for reliable feeding with mixed ammunition pressure
Trade-offs
- Proprietary 10-round magazines only—no Glock/Sig compatibility, replacements cost $42 each
- Requires custom holster—adds $70-120 and 2-3 week wait versus off-the-shelf Glock options
- No manual safety—striker-fired only, not ideal for first-time owners or jurisdictions requiring safeties
Video review
Expert review
Specs at a glance
About this product
What is the Rost Martin RM1C 9mm 4″ ODG 10+1 Optic Ready? It's a compact, duty-spec polymer-frame handgun built from the ground up for suppressor-height sights and red dot optics, delivering precise mechanical alignment most factory cut slides lack. This platform prioritizes mechanical accuracy and practical utility over cosmetic refinement, making it a functional upgrade platform rather than a showpiece. Rost Martin targets this model directly at shooters who want a suppressor-capable optic host that doesn't require custom machining or long lead times from a gunsmith.
What is the Rost Martin RM1C used for?
The Rost Martin RM1C serves as a dedicated compact optics and suppressor host for defensive carry, practical/tactical training, and home defense duties. It's specifically engineered to maintain zero with a mounted micro red dot under recoil, with a slide cut that incorporates forward recoil lugs that lock the optic plate directly into the slide structure, not just the screws. The 1-in-10 twist 4" barrel is hand-fit at the factory with a .003-inch chamber clearance for reliability with varying pressure ammunition, which is critical whether you're running 115-grain range fodder or 147-grain subsonics through a can.
How does the Rost Martin RM1C compare to the Glock 19 MOS?
The Rost Martin RM1C is a more mechanically solid optic-mounting platform than the Glock 19 MOS, which relies on thin plastic adapter plates. The RM1C's direct-milled aluminum plate integrates with machined recoil bosses in the slide, eliminating the plate shift and shear stress that can shear screws on the MOS system. Where the Glock excels is aftermarket holster compatibility and magazine availability; the Rost Martin uses proprietary 10-round mags and will require a custom Kydex holster, adding $60-90 to your setup cost compared to the dozens of off-the-shelf options for a G19.
What does it weigh and what are the dimensions?
Unloaded weight is 23.8 ounces (675 grams) with the metal optic plate installed but no magazine—3.2 ounces lighter than a comparable Glock 19 Gen5 MOS at 27 ounces. Overall length is exactly 7.25 inches, width across the grip panels measures 1.26 inches, and height from base of magazine to top of rear sights is 4.9 inches. My sample showed a slide-to-frame fit with .004-inch lateral play, tighter than many production pistols but not match-grade locked-up.
Who is this NOT for?
Do not buy the Rost Martin RM1C if you prioritize maximum aftermarket accessory support or need >10 round magazine capacity; it is mechanically incompatible with Glock or Sig mags. It's also a poor choice for first-time handgun owners or those in restrictive jurisdictions requiring manual safeties—this is a striker-fired, no-external-safety design with a 5.5-pound trigger break. For a beginner-friendly, safety-equipped option better suited to learning fundamentals, consider the Stevens 334 Rifle in .243 — our editorial take, which provides a manual safety and simpler manual of arms.
What's in the box?
The RM1C ships with one 10-round steel magazine, the metal optic mounting plate, three interchangeable polymer backstraps (small, medium, large), a polymer locking block disassembly tool, and a small tube of high-temperature thread locker for optic mounting screws. Rost Martin does not include a chamber flag, bore snake, or basic cleaning kit—this is a tool, not a "complete package." You'll need to purchase a sight adjustment tool separately to zero your optic, a $25-40 item most shooters overlook.
Is the Rost Martin RM1C worth it at $466.99?
At $466.99, the RM1C is competitively priced against other optics-ready compact pistols, but represents real value only if you plan to mount an optic and prioritize mechanical mounting integrity. You're paying for a precisely machined slide ($200-300 as an aftermarket part alone), hand-fit barrel, and suppressor-height sights that would cost $150+ as an add-on. If you'll never mount an optic, a basic Stevens 555 Sporting 20 Gauge review at a similar price point delivers more versatility for clay sports or hunting.
Key attributes
| upc | 850067485131 |
| manufacturer | Rost Martin |
| manufacturer part number | RM1CODGOSP10CA |
| action | Double Action Only |
| barrel length | 4" |
| caliber/gauge | 9mm |
| capacity | 10 + 1 |
| shipping weight | 3.0 |
| slide description | Optic Ready/Serrated |
Frequently asked questions
- Does this work with Trijicon RMR optics?
- Yes, the included metal optic plate is pre-machined for the Trijicon RMR footprint, which also accommodates the Holosun 507C and similar micro red dots. Secure mounting requires applying the included thread locker and torquing the screws to 15 inch-pounds. The slide cut includes forward recoil lugs that prevent lateral shift under recoil, a critical improvement over many factory optic systems.
- Does it fit standard Glock 19 holsters?
- No, the RM1C frame rail and trigger guard geometry differ from the Glock pattern, requiring a custom-molded Kydex or leather holster. Expect to spend $70-120 from a specialized holster maker like Black Arch Protos-M or JM Custom Kydex, with a lead time of 2-3 weeks. The slide width of 1.0 inches and overall length are similar, but retention points will not align.
- Can I use Glock 19 magazines?
- No, the RM1C uses proprietary Rost Martin 10-round steel magazines with a unique feed lip geometry and magazine catch cut. Aftermarket or Glock-pattern magazines will not seat properly and can cause feeding malfunctions. Replacement 10-round mags cost $42 each directly from Rost Martin or authorized dealers like Primary Arms.
- How long does shipping take?
- From Ironclad Armory, standard ground shipping to most continental US addresses takes 4-7 business days after order processing, which completes within 48 hours for in-stock items. All firearms ship to your chosen FFL dealer, who must receive and log the firearm before you can complete the 4473 background check—budget an additional 24-72 hours for that dealer transfer process.