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GDM® 46 Big Bore Suppressor

Powerful. Versatile. Purpose-built.

The GDM® 46 is a multi-caliber big-bore suppressor engineered for shooters who want one can to handle everything from straight-wall hunting cartridges to heavy-hitting rifle platforms. Precision-manufactured from Grade 5 titanium and finished in DLC internally and externally, the 46 delivers serious suppression capability with modular flexibility.

Why choose the GDM® 46?

  • Rated up to .458 SOCOM for big-bore versatility
  • Fusion- and laser-welded titanium keeps weight to just 15.3 oz
  • Universal HUB interface (1.375×24)
  • Interchangeable muzzle nut system for caliber optimization
  • Includes muzzle nut, direct thread mount, and wrench

Who the 46 is for:

Straight-wall hunters | Big-bore shooters | One-can-do-it-all setups

$1,183.99

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GDM® 46 Big Bore Suppressor
$1,183.99
  • Made In the USA
  • NFA Compliant
  • Lifetime Defect Warranty

NFA item. Compliance required. We assist throughout the process.

GDM® 46 Big Bore Suppressor

The GDM® 46 is part of Guardian Defense Mfg’s big bore series — a modular suppressor platform designed to balance sound suppression, durability, weight, and mounting flexibility across a wide range of calibers.

Manufactured entirely in-house at our family- and veteran-owned facility in Dayton, Ohio, the 46 is built for shooters who demand uncompromising quality and real-world adaptability.

At 8.75 inches long and 15.3 ounces, the 46 delivers effective suppression for straight-wall cartridges and large-bore rifle platforms while maintaining excellent balance. The HUB (1.375×24) interface ensures compatibility with leading mounting systems without locking you into proprietary hardware.

Independent third-party testing validates the GDM® lineup’s real-world performance.

Engineered for Durability & Performance

Constructed from fusion- and laser-welded 6Al-4V Grade 5 titanium, the 46 delivers exceptional strength while keeping weight to a minimum. A DLC coating internally and externally enhances surface hardness and corrosion resistance for demanding use environments.

The suppressor’s 1.612-inch diameter provides an optimal balance between internal volume and maneuverability.

Interchangeable Muzzle Nut System & Mounting Options

The GDM® 46 Series features an interchangeable muzzle nut system that allows caliber-specific optimization without replacing the entire suppressor.

  • Allows serviceability in the event of an end-cap strike
  • Includes .458 caliber muzzle nut (additional sizes available for purchase)
  • Removable using the included wrench
  • Also includes 5/8 x 24 direct thread mount (additional sizes available for purchase)

This system provides flexibility, longevity, and serviceability without compromise.

Manufactured In-House

Every GDM® suppressor is:

  • Designed
  • Machined
  • Welded
  • Assembled
  • Packaged

In-house in Dayton, Ohio.

All GDM® suppressors are backed by a lifetime defect warranty, ensuring long-term confidence in your investment.

Additional information

Model Name

GDM® 46
Item Length

8.75 inches
Item Weight

15.3 oz
Item Diameter

1.612 inches
Material

Fusion- & Laser-Welded 6Al 4V Grade 5 Titanium
Finish

DLC
Caliber Rating

Up to .458 SOCOM
Included Components

.458 Cal Muzzle Nut, 5/8 x 24 Direct Thread, Suppressor, Wrench
Shipping Restrictions

Suppressors can only be shipped to an authorized FFL/SOT registered dealer. We cannot ship to the following states: CA, DC, DE, HI, IL, MA, NJ, NY, or RI.

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Caliber Compatibility & Use Cases

Wondering if this suppressor supports your caliber or barrel length?

Use our caliber compatibility guide to confirm supported calibers, pressure considerations, and platform recommendations before shooting.

View Caliber Compatibility Guide

Compare the GDM® Big Bore Series

Choose the big bore suppressor that best matches your rifle, balance preference, and performance goals.

FeatureGDM® 46GDM® 50
Length8.75"18.125"
Weight15.3 oz4 lbs
MaterialGrade 5 TitaniumGrade 5 Titanium
FinishDLCCerakote
Suppression FocusMaximumMaximum
Mount InterfaceHUB (1.375×24)HUB (1.375×24)
Caliber RatingUp to .458 SOCOMUp to .50 BMG
Supported Platforms.458 SOCOM • .450 Bushmaster • .350 Legend • multi-caliber platforms.50 BMG bolt-action rifles • large-caliber precision rifles
Ideal UseStraight-wall hunters / One-can-do-it-all setupsBig bore / Extreme-caliber rifles
.458 Cal Muzzle Nut✓—
5/8 x 24 Direct Thread✓—
Direct Thread—✓
Balance PriorityVersatilityMaximum suppression
Made In-House (USA)✓✓
Lifetime Defect Warranty✓✓

Which GDM® Big Bore Suppressor Is Right for You?

Choose based on size, balance, and suppression priority.

GDM® 46

Choose this if you want:

  • Big-bore capability up to .458 SOCOM
  • Straight-wall cartridge compatibility
  • Modular caliber flexibility
  • Titanium strength without excessive weight

Best for:

.350 Legend • .450 Bushmaster • .458 SOCOM • Big-bore rifles

View 46

GDM® 50

Choose this if you want:

  • A suppressor rated for .50 BMG
  • Maximum structural integrity
  • Purpose-built big bore performance

Best for:

.50 BMG rifles • Extreme-caliber platforms • Specialized applications

View 50

Compare the GDM® Handgun/Multi-Cal Series

Choose the suppressor that best matches your platform mix, balance preference, and performance goals.

FeatureGDM® 9TiGDM® 45GDM® 46
Length7.125"7.125"8.75"
Weight10.5 oz10.5 oz15.3 oz
MaterialGrade 5 TitaniumGrade 5 TitaniumGrade 5 Titanium
FinishCerakoteCerakoteDLC
Suppression FocusMulti-caliber versatilityMulti-caliber versatilityMaximum
Mount InterfaceHUB (1.375×24)HUB (1.375×24)HUB (1.375×24)
Caliber Rating9mmUp to .45 caliberUp to .458 SOCOM
Supported Platforms9mm pistols • PCCs • subguns.45 ACP pistols • .350 Legend • .450 Bushmaster.458 SOCOM • .450 Bushmaster • .350 Legend • multi-caliber platforms
Ideal UseHandguns / PCCsBig bore pistols / Straight-wall huntersStraight-wall hunters / One-can-do-it-all setups
Balance PrioritySuppression & durabilityVersatilityVersatility
1/2 × 28 Booster Assembly✓——
.578 × 28 Booster Assembly—✓—
1/2 x 28 Direct Thread✓——
.458 Cal Muzzle Nut——✓
5/8 x 24 Direct Thread——✓
Made In-House (USA)✓✓✓
Lifetime Defect Warranty✓✓✓

Which GDM® Handgun/Multi-Caliber Suppressor Is Right for You?

Choose based on versatility, weight, and mounting needs.

GDM® 9Ti

Choose this if you want:

  • Titanium construction
  • Maximum versatility across pistols & PCCs
  • Lightweight performance
  • Included booster & direct thread mount

Best for:

Handguns • PCCs • Multi-platform owners

View 9Ti

GDM® 45

Choose this if you want:

  • Compact big-bore capability
  • Straight-wall cartridge compatibility
  • Handgun-ready configuration out of the box
  • Titanium strength in a shorter format

Best for:

.45 ACP • .350 Legend • .450 Bushmaster • Big-bore pistols

View 45

GDM® 46

Choose this if you want:

  • Big-bore capability up to .458 SOCOM
  • Straight-wall cartridge compatibility
  • Modular caliber flexibility
  • Titanium strength without excessive weight

Best for:

.350 Legend • .450 Bushmaster • .458 SOCOM • Big-bore rifles

View 46

All GDM® suppressors are precision-manufactured in-house in the USA and backed by a lifetime defect warranty.

Need help choosing? Our team is happy to assist before or after purchase.

Suppressors are regulated items and must be transferred through an authorized Class 3 FFL / SOT dealer.

  • Suppressors cannot be shipped to a personal residence
  • Enter your selected FFL / SOT dealer’s address at checkout
  • Orders may be canceled if a residential address is entered

We do not ship suppressors to: CA, DC, DE, HI, IL, MA, NJ, NY, RI

Always verify caliber compatibility, barrel length requirements, and firing schedule limits before use. Improper use may result in damage, injury, or voided warranty.

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