ATTENTION: This firearm is Federally Regulated under the "National Firearms Act" (NFA).  This item is classified as a "Silencer" (SI) . This item may not be legal in your State.  You must speak with your States local ATF office or Division of State Police prior to purchase to understand the requirements and to ensure that you are legally permitted to posess the item.  
 
https://www.atf.gov/firearms
 
In order for this item to legally transfer, it requires transfer to an NFA/SOT dealer or NFA/SOT manufacturer in your State of residence.  A title 1 FFL dealer does not posess the license to acquire NFA items.
 
 
Muzzle Break / QD Mount Sold Separate: Additional $ 149.99
OSS  MUZZLE BRK QD 556 1/2X28.
 
 
Description: 
OSS SILENCER HELIX HXQD 556
Brand: 
OSS
Series: 
Helix HX-QD 556
Caliber: 
5.56
Finish: 
Black
Length: 
6.67
Diameter: 
1.60
Weight: 
17.30
Full Auto Rated: 
Y
User Serviceable: 
Y
 Caliber Rating: 
5.56
Mount Type: 
QD - NO MOUNT INCLUDED
Catalog #: 
1967
Features: 
Compatible W/Flash Hider 556
 
 
Muzzle Break / QD Mount Sold Separate: Additional $ 149.99
OSS  MUZZLE BRK QD 556 1/2X28.