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FOUR BROTHERS HOLSTERS

Rost Martin RM1C IWB Holster with Magazine Carrier Combo

Rost Martin RM1C IWB Holster with Magazine Carrier Combo

Regular price $125.00 USD
Regular price Sale price $125.00 USD
Sale Sold out
Shipping calculated at checkout.
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Description

Rost Martin RM1C IWB Holster & Magazine Carrier Combo

Looking for a complete concealed carry setup? This right-hand or left-hand IWB combo includes a precision-molded holster for the Rost Martin RM1C and an inside waistband magazine carrier for Rost Martin 9MM magazines. Designed for appendix or strong-side carry, this combo delivers performance, comfort, and reliability.

Included Standard Features:

Modwing on Holster – Reduces printing by applying inward pressure to the grip.

Either the Discreet Carry Concepts Monoblock or Ulticlip Ultituck belt attachment – Pre-installed on both holster and magazine pouch for rock-solid retention on standard belts.

Optional Belt Attachments for Holster:

  • Soft Loops
  • RCS Tuckable Overhooks
  • UltiTuck
    (Includes hardware. Customer installs attachments.)

Optional Belt Attachments for Magazine Carrier:

  • Soft Loops
  • UltiTuck

Product Highlights – Holster (Rost Martin RM1C):

  • Custom Fit: Vacuum-formed from a CAD-based mold for the Rost Martin RM1C
  • Concealment-Optimized: Low-profile design reduces printing
  • Adjustability: Adjustable retention, ride height, and cant
  • Red Dot Ready: Profile cut for most optics and suppressor-height sights
  • Durable Build: Made from .093" thick thermoplastic
  • Comfort Features: Full sweat guard, smooth edges, and slim form

Product Highlights – Magazine Carrier (Rost Martin 9MM):

  • Concealment Advantage: Extended height improves concealment of longer magazines like the Rost Martin 9MM
  • Fully Adjustable: Retention, ride height, and cant (~20 degrees)
  • Versatile Orientation: Ambidextrous design – carry bullets forward or rearward
  • Comfort-Focused: Smooth back and rounded edges reduce hot spots; compatible with foam wedges
  • Made from .080" Thermoplastic

Proudly Made in the USA

Carry Setup & Options

They come with a Modwing on the holster and either the Discreet Carry Concepts Monoblock or Ulticlip Ultituck belt attachment on both the holster and mag pouch.


Customize Your Carry Setup:

Add Belt Attachments

Add Extra Hardware

  • Four Brothers Replacement Hardware
  • We have a kit available should you need to remove the modwing that includes  (2) 3/8" Screws, (2) 1/4" Rubber Spacers, and (2) 1/4" Threaded Posts which can be purchased HERE.

Add Ulticlip Options

Add a 4Bros Holster Wedge to your setup— Designed to improve concealment and comfort by helping angle the firearm grip closer to the body while reducing pressure points during IWB carry.

Need Help Choosing Materials or Attachments?

Pro Tip: Apply removable thread locker to all screws after setup to prevent hardware loss during daily carry.

Explore more Holster and Magazine Combination Packages 

Shipping & Returns

Made in the USA

Made in America. Founded, located, engineered, manufactured, and shipped from Northern Indiana.

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