Skip to product information
1 of 8

FOUR BROTHERS HOLSTERS

1911 Inside Waistband (IWB) Holster

1911 Inside Waistband (IWB) Holster

Regular price $70.00 USD
Regular price Sale price $70.00 USD
Sale Sold out
Shipping calculated at checkout.

Description

G.I. Style 1911 Inside Waistband (IWB) Holster — Fits Standard 5" 1911s

This Inside Waistband (IWB) holster is designed for the classic G.I. (GI) style 1911. Fit and retention are validated with an authentic 1911 pistol and confirmed to work with many standard 5" 1911s from Ruger, Smith & Wesson, Rock Island, and similar manufacturers. Shorter 3" and 4" 1911 models will fit but may leave extra room at the muzzle. This model is not compatible with railed 1911 pistols.

Precision Fit & Construction

Each holster is vacuum-formed from a precision-machined mold created from CAD data of the firearm. Every unit is formed, trimmed, and folded in-house, then tested with the actual pistol to confirm fit and retention. Retention is easily adjustable so you can dial in draw tension to your personal preference.

Key Features

  • Inside Waistband design for strong concealment and comfort
  • Open muzzle to allow threaded barrels
  • Adjustable retention for a custom draw feel
  • High sweat shield standard (Medium and Low available by request)
  • Optional Modwing with two inserts to reduce printing by adjusting leverage against the belt
  • Minimal material and smooth edges to reduce printing and improve comfort
  • Made from .093" thermoplastic for increased durability
  • Proudly Made in the USA

Compatibility Notes

This holster does not fit all 1911 models—frame profiles and aftermarket parts vary. If your 1911 has non-standard contours, rails, or oversized compensators, confirm fit before ordering.

Related Resources

Explore holster attachment options in our guide: Inside Waistband Belt Attachments Explained.

Pick finishes and colors with our Holster Color Guide.

Care & Installation Notes

We recommend applying a removable thread locker to each screw after receipt to prevent hardware loosening during regular use.

Frequently Asked Questions

  • Which 1911 models will this IWB holster fit?
    Confirmed to fit many standard 5" G.I. 1911 pistols (Ruger, S&W, Rock Island, etc.). 3" and 4" models will fit but may have extra muzzle space.
  • Will this fit railed 1911s?
    No — this model is not compatible with railed 1911 frames.
  • Is retention adjustable?
    Yes — retention is adjustable so you can fine-tune draw tension.
  • What material thickness is used?
    Constructed from .093" thermoplastic for durability and consistent molding.
  • What does the Modwing do?
    The optional Modwing includes two inserts to increase leverage against the belt, reducing printing and improving concealment.

Features

• Full Sweat Guard
• Adjustable Retention
• Adjustable Cant
• Profile cut to allow red dot sights
• Open Muzzle for threaded barrels and compensators
• Minimal material and smooth edges
• Made from .093" thick thermoplastic for durability.
• Optional Modwing includes two inserts to allow the user to adjust the amount of leverage placed against the inside of the belt to reduce firearm printing
• Proudly Made in the USA

Attachments

  • Monoblock
  • 1 Series Gear Clips
  • Ultituck
  • Soft Loops 
  • RCS Overhooks
  • Ulticlip

IWB Belt Attachments Explained

Made in the USA

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

Shipping & Returns

Terms of Service

View full details