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. 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 136.8 (LEq dBA 124.2), and milspec-left muzzle position 135.4 dBA (LEq dBA 122.5). For reference, the Dominus is a few dB louder at the milspec position and at the shooter's ear. In addition, the SPIRO reduces recoil by approximately 40% compared to a bare muzzle.
| Material | Haynes 282 |
| Length | 5.9 inches |
| Length added | 5.3 inches (DT) |
| Diameter | 1.8-inch OD |
| Mounts | Direct Thread 1/2-28 (DT) -- for .223 |
| Weight | 15.5 ounces |
| Finish | Black CeraKote |
PRIMARY DESCRIPTION
SPECIFICATIONS
Barcode / UPC :
TB-SPIRO-HUB
Firearm Type :
Silencer
Caliber / Ga :
223
On-sale :
No
Hours
Monday: 8AM-5:30 PM
Tuesday: 8AM-5:30 PM
Wednesday: 8AM-5:30 PM
Thursday: 8AM-5:30 PM
Friday: 8AM-5:30 PM
Saturday: By Appointment (See Facebook page for Saturday hours.)
Sunday: Closed
We are available by appointment on weekdays after 5:30 and on Saturdays. Please just call or text to make sure we're around.