Description
The Maxim Defense Industries Maxim Defense Ds-hqd 5.56 is a sound suppressor, rated for .223 REM/5.56 NATO, built in titanium and stainless steel.
This is an NFA item, so the process differs from an ordinary firearm purchase. It transfers on an ATF Form 4, which requires fingerprints, a photograph, notification to your chief law enforcement officer, and an ATF background check. Since 1 January 2026 the transfer tax on suppressors and short-barreled firearms is $0, though the registration and approval requirements are unchanged. You cannot take possession until ATF approves the transfer – the item stays with us until then. It can be registered to you as an individual or to a trust.
It is rated for .223 REM/5.56 NATO. A suppressor may be used on a cartridge at or below its rating and bore diameter, but never above it – firing a larger bullet than the bore allows is how a baffle strike happens, and that destroys the suppressor.
Titanium is used to keep weight down – a titanium tube is markedly lighter than steel of the same size, which matters most on a hunting rifle carried all day. Stainless steel is heavier than titanium and cheaper, and it takes heat and cleaning solvents well, which is why it is common on rimfire and pistol cans that get taken apart.
Suppressors reduce the sound of a shot; they do not silence it. How much quieter any given setup is depends on the host firearm, the barrel length and the ammunition – subsonic ammunition is much quieter than supersonic through the same can, because the crack of a bullet passing the sound barrier happens downrange and cannot be suppressed at the muzzle.
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