Description
The GRIFFIN ARMAMENT Explorr 224 Cal Flat is a sound suppressor, rated for .224 Caliber, built in 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.
The suppressor threads 1/2"x28. The host barrel has to be cut to exactly that thread – 1/2×28 is the usual thread on .22 and 5.56 barrels, and a mismatch will either not start or will cross-thread. If your barrel is a different pitch you need an adapter or a different mount, not force.
It is rated for .224 Caliber. 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.
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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