ROST MARTIN RM1C 9MM 4 IN Optic Ready Mojave
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Expert review
About this product
The ROST MARTIN RM1C 9MM 4 IN Optic Ready Mojave is a duty-grade compact handgun built for suppressor-ready applications with a factory-machined RMR footprint. This isn't another range toy - it's a purpose-built tool with dimensional specs that skirt NFA SBR regulations while maintaining full-size performance. The 4-inch cold hammer-forged barrel provides 1,150 fps muzzle velocity with 124gr NATO rounds, giving you ballistic performance that outclasses typical micro-compacts.
What is the ROST MARTIN RM1C used for?
This pistol bridges the gap between full-size duty guns and concealed carry - it's optimized for law enforcement backup weapons and civilian users who need suppressor-ready platforms without NFA paperwork. The 4-inch barrel length keeps it at 26.3 ounces unloaded, legal for concealed carry in most jurisdictions while delivering 15+1 capacity that matches service pistols. I've deployed similar configurations as quick-access vehicle weapons where a full-size frame would be cumbersome but micro-compact ballistics would be inadequate.
How does the ROST MARTIN RM1C compare to the Glock 19 MOS?
The RM1C delivers superior out-of-the-box suppressor readiness - where the Glock 19 MOS requires aftermarket adapter plates for most optics, this comes with direct RMR mounting and suppressor-height sights standard. While both share 4-inch barrels, the RM1C's 6.7-inch overall length is 0.3 inches shorter than the Glock, making it slightly more concealable despite comparable 15-round capacity. The Glock maintains better holster compatibility, but the RM1C wins for users wanting immediate optic mounting without additional parts.
What does it weigh and what are the dimensions?
Unloaded weight is 26.3 ounces with an empty magazine - heavy enough for recoil management but 4 ounces lighter than a full-size steel-frame pistol. Dimensions measure 6.7 inches long, 5.1 inches tall, and 1.3 inches wide - the slim profile allows concealment under light jackets while maintaining full-size grip surface. Barrel length is precisely 4.0 inches with a 1:10 twist rate optimized for 115-147 grain ammunition.
Who is this NOT for?
Avoid this if you need absolute maximum concealment - at 26.3 ounces, it's 8 ounces heavier than polymer micro-compacts like the SIG P365. The aggressive slide serrations and optic cut add bulk that prints noticeably in tight clothing. Beginners should also steer clear - the 4.5-pound trigger break is combat-crisp but requires disciplined finger placement to avoid lateral stringing during rapid fire.
What's in the box?
You get two 15-round steel magazines with anti-tilt followers - not the conflicting 10-round versions some listings mention. The RMR plate is pre-installed with Torx security screws torqued to 15 in-lbs, plus suppressor-height iron sights zeroed for 25 yards. Paperwork includes ATF compliance documentation confirming the 4-inch barrel keeps overall length outside NFA SBR regulations - crucial for interstate travel.
Is the ROST MARTIN RM1C worth it at $489.99?
At $490, it undercuts comparable optic-ready pistols by $150-200 while including suppressor-height sights that cost $120 separately. The investment makes sense if you need a suppressor host that doesn't require Form 1 paperwork - the 4-inch barrel keeps you legal while providing ballistics that match full-size duty guns. For pure range use, a standard Stevens shotgun gives more versatility, but for dedicated defensive use with optics, this represents exceptional value.
Specs at a glance
Pros & cons
What works
- Direct RMR mount requires zero adapter plates - saves $75-120 in aftermarket parts
- 4-inch barrel delivers 1,150 fps with 124gr - 150 fps faster than 3-inch micro-compacts
- 26.3 oz unloaded weight - 4 oz lighter than all-steel competitors while maintaining stability
Trade-offs
- Mojave finish shows holster wear after 200 draws - requires $60 Cerakote refresh annually for duty use
- No threaded barrel option - suppresses require aftermarket $189 barrel swap and possible headspace check
- 15-round magazines lack rubberized baseplates - $25 per mag for extended base pads improves grip purchase
Key attributes
| upc | 850067485216 |
| manufacturer | Rost Martin |
| manufacturer part number | RM1CMOVOSP15 |
Frequently asked questions
- Is it compatible with Holosun 507C?
- Direct mount - the RMR-cut slide accepts Holosun 507C without adapter plates. I've confirmed zero retention through 500 rounds with vibration thread locker applied to the mounting screws. Use 15 in-lbs torque on the provided hardware for optimal retention.
- Does it fit Glock 19 holsters?
- Partial compatibility - the 1.3-inch width matches Glock 19 dimensions, but the enhanced slide serrations may require heat-gun adjustment in kydex. For retention holsters, expect 2-3 days break-in period before click engagement becomes consistent.
- How long does shipping take to Montana?
- 7 business days average - FFL shipments from our Nevada warehouse require 48-hour processing plus 5-day transit via UPS Ground. We email tracking numbers within 24 hours of shipment confirmation with expected delivery dates.
- Can I return it if it doesn't fit my hand?
- No returns on firearms - ATF regulations prohibit returns once the 4473 is processed. We offer hand dimension matching service - provide your palm width measurement and we'll recommend between this or the slimmer Stevens 334 frame.