SPIRO 6mm/.243 – DT

The Thunder Beast SPIRO 6mm/.243 DT is available now from LM Ironwerks, a licensed FFL/SOT dealer in Louisville, Kentucky.

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

Buying the Thunder Beast SPIRO 6mm/.243 DT from LM Ironwerks

This is an NFA item, so it ships only to a licensed SOT dealer. Choose your dealer at checkout, and they’ll walk you through the transfer paperwork. In addition, our team reviews every order before it ships. Kentucky customers, please call us at (502) 430-1549 to order. For details on the process, see the ATF’s NFA page. Looking for something different? Browse all of our suppressors.