TBACSPIRO 243 SR
6mm / .243 suppressor · TBAC SR interface · specs and compatibility from the manufacturer
Notable features
- Low Backpressure
- TBAC Summit Tested
- Haynes 282
- Full-Auto Rated
weight
18.7oz
MSRP
$1,495
weight
18.7oz
calibers
5.56 | 6mm
material
Haynes 282
interface
TBAC SR
MSRP
$1,495
- Length added to the gun
- 6.5″
- How much longer the gun gets with the suppressor fitted, as the maker states it.
- Diameter
- 1.8″
- Class
- 6mm / .243
- n
- 67
- Range
- 1.49″–1.83″
- Median
- 1.63″
- Weight
- 18.7 oz
- Class
- 6mm / .243
- n
- 73
- Range
- 6.2 oz–21.9 oz
- Median
- 13.54 oz
- Material
- Haynes 282
- Finish / treatment
- Black Cerakote
- Max caliber
- .243 Cal / 6mm
- Base interface
- TBAC SR
- Front cap
- Fixed
- Backpressure
- Low
- Full-auto rated
- Yes
- Barrel restriction
- 12.5" minimum
- Minimum barrel lengths for SPIRO 6mm/.243: any barrel length for 4.6x30 HK and 5.7 FN; 8" for .223, 5.56mm, 5.45 Russian; 12.5" for 22 ARC, 224 Valkyrie, 6 ARC; 18.0" for .22-250, 22 Creedmoor, .243WIN, 6 Creedmoor, 6GT. These are the ratings at maximum operating temperature; TBAC says shorter barrels may work if temperature is controlled.
- Firing schedule
- Hard-Use/Full-Auto Mod 1 (HU/FA/1): lifetime to exceed at least 20 SOCOM/SURG cycles on an 8.0" Mk18-style AR (the upper and muzzle device will likely not survive the whole trial)
- MSRP
- $1,495
- Class
- 6mm / .243
- n
- 66
- Range
- $520–$1,529
- Median
- $963
Wider than most 6mm / .243 suppressors
Diameter compared against the 67 6mm / .243 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Heavier than most 6mm / .243 suppressors
Weight compared against the 73 6mm / .243 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Pricier than most 6mm / .243 suppressors
MSRP compared against the 66 6mm / .243 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Not published by the manufacturer: overall length.
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
Is something on this page wrong?
- Base interface
- TBAC SR
- Front cap
- Fixed
This suppressor's TBAC SR takes no separate mount. 17 muzzle devices in our catalog attach to it directly.
Which ones fit your barrel and host?
Check in the BuilderThe Thunder Beast Silencer Summit fires every suppressor entered on the same gun, with the same equipment. SPIRO 243 SR was measured in 1 test. Figures can only be compared with others from the same test, so each one links to everything else fired on that gun.
Gas-operated rifles and carbines
Measurements published by Thunder Beast Arms Corp. How to read these
Manufacturer claim
- TBAC testing found that on 5.56 hosts the difference in overall performance (including sound reduction) of a .223 vs. .243 bore size is imperceptible to human senses; the dB difference averages about +/- 1 dB(A) and depends on specific application and barrel length.
- Mounts: Direct Thread 1/2-28 (DT) -- for .223 Direct Thread 5/8-24 (DT) -- for .243 HUB (1.6" from TE to first baffle) * no mount included with HUB version SR v2.
- Low Back Pressure Gas Gun Suppressor Extreme Duty/Full-Auto Dedicated versions for 5.56mm; 6mm (6ARC) Available in SR (v2) mount, Direct Thread, and 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 .
- No longer do you have to compromise and have your gas gun suppressor be "Low back pressure but loud at the muzzle." The 5.56 SPIRO increases back pressure gas flow by only approximately 50% compared to a bare muzzle (most LBP are 35-85%), which is 3X less gas than a Dominus-SR.
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- The SPIRO only increases the cyclic rate of an Mk18 by about 5% (compared to 43% for a Dominus-SR; most LBP 3%-10%).
- This is while keeping Shooter's Ear peak dBA at 137.7 (LEq dBA 124.9), and milspec-left muzzle position 138.2 dBA (LEq dBA 124.4).
- The SPIRO-SR uses v2 of the SR system. The SR v2 differs from the original SR only by the new mounts being shorter. SR v1 suppressors (Dominus, Magnus, 338 Ultra, etc) will fit on SR v2 mounts, but the SPIRO-SR will not fit on the older SR v1 mounts, simply because they are too long. The SPIRO-SR is only available in 6mm/.243 bore size.
- Finish: Black CeraKote.
- Brake material: Haynes 282.
- Rated Hard-Use/Full-Auto Mod 1 [HU/FA/1]: lifetime to exceed at least 20 SURG cycles on an 8.0" Mk18 style AR, versus 10 cycles on a 10.5" barrel for the other TBAC full-auto rated suppressors. The upper and muzzle device will likely not survive the entire trial.
- Minimum barrel lengths for SPIRO 6mm/.243: any barrel length for 4.6x30 HK and 5.7 FN; 8" for .223, 5.56mm, 5.45 Russian; 12.5" for 22 ARC, 224 Valkyrie, 6 ARC; 18.0" for .22-250, 22 Creedmoor, .243WIN, 6 Creedmoor, 6GT. These are the ratings at maximum operating temperature; TBAC says shorter barrels may work if temperature is controlled.
Is one of these wrong, or does our wording say something the source doesn't?
