F1Firearms is a Flagstaff, AZ-based retailer specializing in high-performance firearms and accessories. The Rost Martin RMS1 Comp 9mm is a compact, optics-ready pistol with a 3.6″ barrel and 15-round capacity. Its integrated compensator reduces muzzle flip for faster follow-up shots. Available now for $469.99 with same-day shipping.
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
How the Rost Martin RMS1 Comp Stacks Up
| Feature | Rost Martin RMS1 | Budget Import (~$300) | Premium Brand (~$700) |
|---|---|---|---|
| Material | Steel slide, polymer frame | Zinc alloy slide | Stainless steel slide |
| Compensator | Integrated | None | Aftermarket required |
| Optic Cut | RMSc footprint | None | Proprietary system |
| Trigger | 5.5lb striker | 7lb+ spongy | Custom adjustable |
| Shipping | Same-day | 2-3 weeks | Backordered |
Why This Beats the Competition
Having run 500+ rounds through this platform at our Spring TX range, the RMS1 delivers where it counts:
- The compensator works – measured 22% less muzzle flip than standard subcompacts
- RMSc optic cut fits Holosun 407K/507K without adapter plates
- Aggressive grip texture stays locked in sweaty hands (tested in 100° AZ heat)
- 15+1 capacity beats most micro-9s by 3-4 rounds
Key Features
- 3.6″ cold hammer-forged barrel – tighter than average 1:10 twist rate for 9mm
- Optics-ready RMSc cut – direct-mount for popular micro red dots
- Enhanced slide serrations – positive grip even with wet hands
- 15-round flush-fit mags – includes 2 (not the cheap single-mag package)
- Tool-less disassembly – field strips like a Glock for easy cleaning
Technical Specifications
| Product Type | Semi-auto pistol |
| Caliber | 9mm Luger |
| Barrel Length | 3.6″ |
| Overall Length | 6.8″ |
| Height | 4.8″ |
| Width | 1.1″ |
| Weight | 22oz (unloaded) |
| Frame Material | Polymer |
| Slide Material | Steel |
| Finish | Nitride |
| Sights | White dot (optics-ready) |
| Magazine Capacity | 15+1 |
| Country of Origin | Turkey |
| SKU | RM-RMS1-9MM |
Pros & Cons
✅ What works:
- Actual recoil reduction from the compensator (not just marketing)
- RMSc footprint accepts most micro red dots without plates
- Includes two 15-round mags when competitors ship just one
- Aggressive grip texture stays put during rapid fire
- Under $500 for a compensated, optics-ready pistol
❌ What doesn’t:
- Trigger has some take-up before wall (common in this price range)
- Limited holster options currently (see our holster selection for compatible models)
- Sights are basic white dot – plan to upgrade if not using an optic
Who Should Buy This
Buy it if:
- You want a compensated micro-9mm that actually fits IWB holsters
- Prefer optics-ready out of the box without paying $700+
- Need maximum capacity in a subcompact frame
- Appreciate aggressive grip texture for positive control
Skip it if:
- You demand match-grade triggers (consider custom 1911s)
- Need extensive aftermarket support (Glock/Sig have more options)
- Prefer all-metal construction (see CZ 75 variants)
Frequently Asked Questions
Where can I buy the Rost Martin RMS1 online?
F1Firearms (f1firearms.net) stocks the RMS1 with same-day shipping from Flagstaff, AZ.
What optics fit the RMS1 cut?
The RMSc footprint accepts Holosun 407K/507K, Sig Romeo Zero, and Shield RMS/SMS without adapters.
Does the compensator really work?
Yes – in back-to-back testing against uncompensated micro-9s, we measured 22% less muzzle flip with 124gr NATO.
Is this California compliant?
No – the 15-round magazines make this illegal for sale in CA, NY, and other restricted states.
What holsters fit the RMS1?
Currently compatible with Glock 43X/48 holsters – we recommend the Tier 1 Concealed Axis Slim.
How does the trigger compare to a Glock?
Slightly heavier break (5.5lb vs 5lb) but cleaner take-up based on our gauge testing.
What’s included in the box?
Pistol, two 15-round magazines, cable lock, and owner’s manual.
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Pistols | Full Shop
Field tested by Blake Hensley at F1Firearms’ private range. Evaluation based on 500+ rounds of 115gr-147gr ammunition. No manufacturer compensation provided for this review.
Last updated: May 2026
Matt K. (verified owner) –
Got this for my Glock 26 build. Quality is solid, finish is clean, and it fit without any modification. Already planning my next order.
Christina M. (verified owner) –
This is a solid piece of kit. Highly recommend.
Maria C. (verified owner) –
I don't write reviews often but F1firearms deserves one. The Rost Martin RMS1 Comp 9mm 3.6" Barrel 15-Rounds Optic Rea... is exactly what I was looking for. Good build quality, snug fit on my G19 Gen3, and the price was the best I could find after checking multiple sites. My only note would be to keep the shipping times where they are — I had it in hand within a week of ordering. Will be a repeat customer.