Hi, guys,
None of those gadgets make a semi-auto into a full auto. The law defines a machinegun as a weapon (except a shotgun firing pellets) which fires more than one shot with a single operation of the firing mechanism (trigger). Those gadgets operate the trigger very rapidly, but do not fire more than one shot per trigger pull.
Mostly, though, they are junk. Even the good ones are touchy partly because they can pull the trigger before the rifle can reload itself and go back in battery, usually resulting in a jam or misfire.
They provide a simulation of FA fire, which in some cases can be a problem, as it gets attention. As I have mentioned in another context (dummy M14 selector), something may be legal, but you might spend time convincing ATF, the local cops, or a prosecutor of that, and meantime you may be "detained" for an investigation.
Jim
None of those gadgets make a semi-auto into a full auto. The law defines a machinegun as a weapon (except a shotgun firing pellets) which fires more than one shot with a single operation of the firing mechanism (trigger). Those gadgets operate the trigger very rapidly, but do not fire more than one shot per trigger pull.
Mostly, though, they are junk. Even the good ones are touchy partly because they can pull the trigger before the rifle can reload itself and go back in battery, usually resulting in a jam or misfire.
They provide a simulation of FA fire, which in some cases can be a problem, as it gets attention. As I have mentioned in another context (dummy M14 selector), something may be legal, but you might spend time convincing ATF, the local cops, or a prosecutor of that, and meantime you may be "detained" for an investigation.
Jim