NIELSEN SONIC Sonic 40 Compact 5/8×24 Max 6

The Nielsen Sonic 40 Compact is a short over-barrel silencer developed for smaller rifle calibres and cartridges with moderate powder capacity.

This version features a 5/8×24 UNEF direct-thread mounting system and Nielsen Sonic’s Max 6 bore specification. It is intended for compatible small-calibre rifles using projectiles within the manufacturer’s 6 mm class.

The telescopic construction extends approximately 75 mm over the barrel and adds only about 117 mm to the firearm’s overall length. A durable steel core improves heat resistance, while the 40 mm outside diameter provides useful internal volume without creating an excessively bulky profile.

Key features:

• Compact over-barrel silencer
• Nielsen Sonic Max 6 bore specification
• Intended for compatible small-calibre rifles
• 5/8×24 UNEF direct-thread mounting
• Approximately 117 mm forward extension
• Approximately 75 mm rearward barrel overlap
• Durable steel core
• Knurled outer surface
• Modular and serviceable construction
• Maximum barrel diameter of approximately 23 mm
• Made in Denmark

Technical specifications:

• Brand: Nielsen Sonic
• Model: Sonic 40 Compact
• Product code: SC40-5/8x
• Bore classification: Max 6
• Intended projectile class: Nielsen Sonic’s 6 mm category
• Thread: 5/8×24 UNEF
• Thread pitch: 24 threads per inch
• Mounting system: Direct thread
• Construction: Over-barrel
• Overall length: Approximately 192 mm
• Forward extension: Approximately 117 mm
• Barrel overlap: Approximately 75 mm
• Diameter: Approximately 40 mm
• Weight: Approximately 310 g
• Maximum barrel diameter: Approximately 23 mm
• Core: Steel
• Outer surface: Knurled

Possible applications:

Subject to exact cartridge and manufacturer approval, the Max 6 version may be suitable for calibres such as .222 Remington, .223 Remington/5.56 mm and selected 6 mm/.243-calibre cartridges.

Compatibility notice:

The 5/8×24 UNEF thread is commonly found on .30-calibre rifles. However, this specific silencer has a Max 6 bore and is not suitable for .300 AAC Blackout, .308 Winchester or other .30-calibre projectiles.

The Max 6 bore rating—not the thread size—determines the maximum projectile that may pass safely through the silencer.

Confirm the rifle’s exact calibre, bullet diameter, pressure suitability, 5/8×24 UNEF muzzle thread, barrel diameter, available rearward clearance, shoulder dimensions and bore alignment before use.

Maintenance:

• Remove the silencer after use and allow it to dry completely.
• Avoid allowing the barrel or silencer to become excessively hot.
• Clean with suitable oil and a soft cloth when necessary.
• Avoid alkaline cleaners, ultrasonic cleaners and abrasive products.
• Regularly separate the modules and apply suitable thread grease if continued disassembly is required.

Please confirm stock before purchasing, as stock levels on this range can change rapidly. Product images are for illustration purposes and may differ slightly from the supplied item.