Caliber: 5.56 NATO - Weight: 16.1 oz - Length: 7.0 in - Mount: Bi-Lock QD - Sound Reduction: 32 dB - Diameter: 1.5 in - Materials: Titanium / Inconel - Finish: High-Temp. Cerakote - The heavy-duty Elite-FA-QD for 5.56mm NATO is rated for full-auto ?re and mounts with a Bi-Lock quick disconnect flash hider with standard 1/2 - 28 - 2B threads. - Packing includes the following: (1) 5.56mm suppressor (1) 1/2 - 28 - 2B quick attach flash hider (others available upon request). - For barrels: 10.5� minimum length 5.56x45/223.