What thread pitch and calibre compatibility does the GrovTec G-Nite GTHM353 feature?

The GrovTec G-Nite GTHM353 is specifically bored for 9mm 9x19mm Luger calibre utilising .355 to .356-inch projectiles and features a standard 1/2-28 TPI thread pitch. It is crucial to verify your barrel thread before installation, as alternative 9mm barrels threaded at 1/2-36 TPI require the separate GTHM354 model instead.

Is a crush washer included with the GrovTec G-Nite 9mm Flash Hider for installation?

Yes, the GTHM353 package includes one precision crush washer to assist with proper timing and indexing during installation on your pistol calibre carbine. The device is manufactured from precision-machined steel finished with a durable black nitride coating for enhanced corrosion resistance.

Can I use the GTHM353 flash hider on a .40 S&W or .45 ACP barrel?

No, this flash hider must not be used on calibres larger than 9mm such as .40 S&W or .45 ACP due to the high risk of a dangerous baffle strike. It is engineered strictly for 9mm projectiles within its designated 1/2-28 TPI operational limits.

Are flash suppressors compliant for use on firearms in Australia?

Flash suppressors are generally unrestricted firearm parts in most Australian jurisdictions, though specific state and territory laws can vary regarding muzzle device attachments and cosmetic configurations on Category B or H firearms. Buyers should ensure compliance with their local state-level firearms regulations prior to purchasing and fitting.

9mm Flash Hider - GrovTec GTHM353

The GrovTec G-Nite 9mm Flash Hider (MPN GTHM353) is a precision-machined steel muzzle device engineered specifically for 9mm (9x19mm Luger / .355–.356" projectile) firearm platforms. Threaded in standard 1/2"-28 TPI, it utilizes multiple rows of radial ports to disrupt, disperse, and rapidly cool expanding combustion gases at the muzzle. This direct gas management mitigates visible muzzle flash to preserve dark-adapted vision and maintain an unobstructed sight picture during low-light operation. Finished with a protective black nitride coating for fouling and gas-erosion resistance, it comes complete with a crush washer for proper timing and barrel alignment.

Key Features

Radial Porting: Engineered with multiple rows of radial ports that actively disrupt and vent combustion gases to suppress flash signature.
Corrosion-Resistant Finish: Treated with a deep-penetrating black nitride (melonite) finish to withstand high-pressure gas erosion and environmental corrosion.
Dedicated 9mm Bore: Machined specifically for .355–.356" diameter projectiles to ensure safe clearance and optimal flash suppression efficiency.
Included Crush Washer: Supplied with one crush washer to ensure secure installation, correct timing, and proper indexing on the barrel shoulder.

Specifications

Brand: GrovTec US, Inc.
Manufacturer Part Number (MPN): GTHM353
Calibre Compatibility: 9mm Luger (9x19mm / .355–.356" projectile diameter)
Thread Pitch: 1/2"-28 TPI
Material: Precision-machined steel
Finish: Black Nitride
Included Hardware: 1x Crush Washer
Operating Type: Passive mechanical muzzle device

Who is the GrovTec G-Nite 9mm Flash Hider 1/2-28 for?

Low-light pistol calibre carbine shooters — Requires radial gas-cooling ports designed for 9mm (.355–.356" projectile) platforms to prevent muzzle flash from overwhelming night-adapted vision and disrupting sight alignment in dark environments.
Tactical and defensive PCC operators — Demands a dedicated 9mm flash hider with standard 1/2"-28 TPI barrel threading and a black nitride finish to maintain visual awareness during rapid fire while resisting fouling and high-pressure gas erosion.

Less suitable for: Firearms with non-standard 1/2"-36 TPI muzzle threads (which require an alternate 1/2"-36 threaded flash suppressor), calibres exceeding 9mm such as .40 S&W or .45 ACP due to critical bore clearance limits, or competitive match shooters seeking flat-shooting recoil elimination rather than flash suppression (who require a dedicated multi-port 9mm compensator or muzzle brake).

SKU	GT40840LP
Model #	GTHM353
Brand	Grovetec
Shipping Weight	1.0000kg

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Grovtec Gthm353 G-Nite Flash Hider 9mm 1/2-28 Black Nitride

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