Specifications:
- Manufacturer: Thunder Beast Arms (TBAC)
- Model: SPIRO 6mm/.243
- Caliber Rating: 6 ARC, .243 Winchester, 6 Creedmoor
- Additional Compatible Calibers: 6GT, 22 ARC, 224 Valkyrie, .22-250, 22 Creedmoor, .223, 5.56mm, 5.45 Russian, 4.6×30 HK, 5.7 FN
- Material: Haynes 282 (Nickel-Chromium-Cobalt-Molybdenum Super Alloy)
- Length: 5.9 inches
- Length Added to Weapon: 5.3 inches
- Diameter: 1.8 inches OD
- Weight: 15.5 oz
- Finish: Black Cerakote
- Mount: HUB Interface (1.375×24 tpi, 1.6″ TE to First Baffle)
- Mount Included: No (HUB Version)
- Durability Rating: Hard-Use/Full-Auto Mod 1 (HU/FA/1)
- Full-Auto Rating: 20+ SOCOM SURG Cycles on 8″ Barrel
- Performance: Low Back Pressure
- Use: Gas Guns, Hard-Use, Full-Auto, Bolt Actions
- Minimum Barrel Length (6 ARC): 12.5 inches (including High-Pressure 80kpsi variants)
- Minimum Barrel Length (.243 WIN, 6 Creedmoor, 6GT): 18.0 inches
- Warranty: TBAC Limited Lifetime Warranty
- Patent Status: Subject to One or More US Patents Pending
Minimum Barrel Length Table (6mm/.243 SPIRO):
- Any Length: 4.6×30 HK, 5.7 FN
- 8″ Minimum: .223, 5.56mm, 5.45 Russian
- 12.5″ Minimum: 22 ARC, 224 Valkyrie, 6 ARC (including High-Pressure 80kpsi variants)
- 18.0″ Minimum: .22-250, 22 Creedmoor, .243 WIN, 6 Creedmoor, 6GT







