Thunder Beast Spiro 6mm/.243 HUB

The SPIRO is a low back pressure gas-gun suppressor that has excellent sound suppression levels at both the muzzle and at shooter’s ear.

A dedicated 6mm / .243 version of the SPIRO. It is designed for 6ARC, but can also accomodate .243WIN and 6 Creedmoor (see minimum barrel lengths in table, opposite).

The 6MM version meters the following on 6 ARC (16″ Geissele AR-15, Hornady TAP)
– Milspec (muzzle) 137.7 dBA; LEQ dBA 124.5
– Shooter’s Ear 138.0 dBA; LEQ dBA 125.0.

People have been talking about “low back pressure” for a while, but there hasn’t been an objective method to actually quantify it. We weren’t satisfied with that, so we invented the TBAC Method of Measuring Back Pressure, and then we used the same sound-test setup we use at the SILENCER SUMMIT to make a very low-back-pressure suppressor that is also unbelievably quiet at both the muzzle and at the shooter’s ear, for a suppressor under 6″.

Specifications: 

Maximum Rated Caliber: .243 Win, 6 Creedmoor

Weight: 15.5 oz.

Length: 5.9″ (5.3″ DT)

Diameter: 1.8 – inch OD

Finish: Black Cerakote

Brake Material: Haynes 282

Mounts:

• Direct Thread 5/8-24 (DT)
• HUB (1.6″ from TE to first Baffle) – *NO MOUNT included with HUB version