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GDM® 30L Rifle Suppressor

Maximum suppression. Purpose-built. No compromises.

The GDM® 30L is engineered for shooters who want the quietest possible performance from the GDM® 30 Series. As the longest configuration in the lineup, the 30L delivers the highest level of sound suppression while maintaining the durability and mounting flexibility the series is known for.

Why choose the GDM® 30L?

  • Highest suppression levels in the GDM® 30 Series
  • Fusion- and laser-welded titanium built for durability at 18.5 oz
  • Universal HUB interface (1.375×24)
  • Serviceable muzzle nut system for long-term ownership
  • Includes muzzle nut, direct thread mount, and wrench

Who the 30L is for:

Precision rifles | Suppression-first setups | Range & hunting platforms

$1,267.99

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GDM® 30L Rifle Suppressor
$1,267.99
  • Made In the USA
  • NFA Compliant
  • Lifetime Defect Warranty

Compatible Accessories

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

GDM® 30L Rifle Suppressor

The GDM® 30L is part of the GDM® 30 Series — a modular suppressor platform engineered to balance sound suppression, durability, weight, and mounting flexibility.

The GDM® 30L represents the pinnacle of suppression performance in the GDM® 30 Series. Designed for shooters who prioritize noise reduction above all else, the 30L maximizes internal volume to deliver the quietest shooting experience possible within the platform.

Manufactured entirely in-house at Guardian Defense Mfg’s family- and veteran-owned facility in Dayton, Ohio, the 30L is built with uncompromising attention to detail.

Its 9.5-inch length and 18.5-ounce weight provide superior suppression while maintaining balance on precision and hunting rifles, where performance outweighs compactness. The HUB (1.375×24) mounting interface ensures compatibility with a wide range of industry-standard mounting systems, giving shooters flexibility without locking into proprietary solutions.

Independent third-party testing confirms the real-world performance of the GDM® 30 Series.

Engineered for Durability & Performance

The GDM® 30L is constructed from fusion- and laser-welded 6Al-4V Grade 5 titanium, delivering exceptional strength and durability. A DLC coating internally and externally enhances wear resistance and corrosion protection, ensuring the suppressor performs reliably in demanding environments.

As the longest suppressor in the series, the 30L is optimized for applications where maximum sound reduction is the primary objective.

Interchangeable Muzzle Nut System

The GDM® 30 Series features an interchangeable muzzle nut system that allows caliber-specific optimization.

  • Allows serviceability in the event of an end-cap strike
  • Includes .30 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 design enhances versatility while extending product lifespan.

Manufactured In-House

Every GDM® suppressor is:

  • Designed
  • Machined
  • Welded
  • Assembled
  • Packaged

In-house in Dayton, Ohio.

Each suppressor is backed by a lifetime defect warranty, reinforcing Guardian Defense Mfg’s commitment to quality and customer confidence.

Additional information

Model Name

GDM® 30L
Item Length

9.5 inches
Item Weight

18.5 oz
Item Diameter

1.612 inches
Material

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

DLC
Mount Interface

1.375 x 24 HUB
Caliber Rating

.30 caliber and below
Included Components

.30 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® 30 Series

Choose the .30 caliber suppressor that best matches your rifle, balance preference, and performance goals.

FeatureGDM® 30CGDM® 30KGDM® 30MGDM® 30L
Length5.75"6.45"8"9.5"
Weight10 oz11.5 oz15 oz18.5 oz
MaterialGrade 5 TitaniumGrade 5 TitaniumGrade 5 TitaniumGrade 5 Titanium
FinishDLCDLCDLCDLC
Suppression FocusCompactBalancedEnhancedMaximum
Mount InterfaceHUB (1.375×24)HUB (1.375×24)HUB (1.375×24)HUB (1.375×24)
Caliber Rating.30 caliber and below.30 caliber and below.30 caliber and below.30 caliber and below
Supported Platforms.300 Win • .308 Win • .300 BLK • .300 PRC • 6.5 Creedmoor • 5.56 NATO • 6mm ARC • 7mm PRC • similar rifle calibers.300 Win • .308 Win • .300 BLK • .300 PRC • 6.5 Creedmoor • 5.56 NATO • 6mm ARC • 7mm PRC • similar rifle calibers.300 Win • .308 Win • .300 BLK • .300 PRC • 6.5 Creedmoor • 5.56 NATO • 6mm ARC • 7mm PRC • similar rifle calibers.300 Win • .308 Win • .300 BLK • .300 PRC • 6.5 Creedmoor • 5.56 NATO • 6mm ARC • 7mm PRC • similar rifle calibers
Ideal UseShort-barrel / weight-SensitivePerformance / General purposeMid-length / PrecisionBolt / Hunting
Balance PriorityMinimal lengthVersatilitySuppression vs balanceMaximum suppression
.30 Cal Muzzle Nut✓✓✓✓
5/8 x 24 Direct Thread✓✓✓✓
Made In-House (USA)✓✓✓✓
Lifetime Defect Warranty✓✓✓✓

Which GDM® .30 Cal Suppressor Is Right for You?

Choose based on size, balance, and suppression priority.

GDM® 30C

Choose this if you want:

  • The shortest possible suppressor
  • Minimal added length
  • Lightweight titanium performance

Best for:

Compact builds • Short barrels • Weight-sensitive setups

View 30C

GDM® 30K

Choose this if you want:

  • The best balance of size and performance
  • A versatile suppressor for multiple platforms
  • Everyday suppressed shooting

Best for:

Balanced builds • General-purpose platforms • Performance-focused shooters

View 30K

GDM® 30M

Choose this if you want:

  • Noticeably improved sound suppression
  • A mid-length configuration
  • Better suppression without full-length bulk

Best for:

Precision rifles • Mid-length barrels • Suppression-focused builds

View 30M

GDM® 30L

Choose this if you want:

  • Maximum suppression performance
  • The longest and quietest option
  • Reduced blast and tone priority

Best for:

Bolt guns • Hunting rifles • Maximum suppression setups

View 30L

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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