Alot of companies make suppressors and mounts specifically for the M-14.
SEI/Fisher ent: Made specifically for the M-14, model is in service with the DOD on MK-14 mod 0's.
Surefire: Several models, in service with USSOCOM on MK-14 Mod 1's.
OPS Inc: In service with the Marine Corps and USSOCOM on older DMR, EOD rifles. I dont think these are commercially available anymore, at least the muzzle brake isn't. It also requires modification of the barrel.
AWC-Non QD threads onto barrel.
Delta P Design: Also makes a nice adapter that replaces the USGI flash hider and allows you to use the standard front sight and any muzzle device threaded for 5/8"s x 24.
And I'm sure there are several others. My recommendation are to either get a gas lock front sight from SEI or use the adapter from Delta P Design so you can continue to use your factory sights.
Also consider getting an adjustable gas plug from schuster and find an M-3 breach shield if you dont have a scope mount. Suppressors on the M-14 tend to overgas the system which may result in gas blowing back from the breach and higher op rod velocities. You may also want to consider running a buffer but those seem to be somewhat controversial on whether they do anything and are sometimes more trouble than they are worth...
Also, when did suppressors become legal to own in Michigan? The reason I ask is because I'm from michigan and was considering whether to get a suppressor... As I'm currently outside the state but was probably going to move back when my time here is up.
Who using a suppressor also has a Schuster adjustable gas plug. Ive heard those are a must.
Its only a recommendation.
Because gas escaping around the bullet and pushing behind the bullet must flow through the baffles on the suppressor it generates more pressure due to the restriction of flow. Gas that would normally be vented out of the end of the barrel after the bullet leaves the bore must now pass through and additional length of suppressor, this restriction causes more gas to pass thru the port into the gas piston. Using an adjustable gas plug can help regulate this making use of the suppressor less harsh on your op rod and piston. You have to understand the additional force of the gas will push the piston faster, and while the gas is vented downward after the piston is full aft, the piston has already moved at an accellerated rate. Causing it to move faster and therefore impact harder both at the rear of the gas cylinder and upon the op rod.
The Navy began using modified brookfield precision gas pistons with a smaller diameter port for gas, for use with suppressors.
Other things that have been tried are 1/16" holes drilled thru the center of the gas plug.
And I believe that both AWC and AAC can modify your spindle valve by drilling a smaller diameter hole perpindicular to the existing hole, thus when your spindle valve is in the off position for launching grenades, it will still vent into the cylinder. So it takes it from gas on/gas off to can off/can on. Please see this link: http://www.silencertalk.com/forum/vi...le+mod#p375940
An adjustable gas plug takes the headache out of tracking down a brookefield rev 2 piston or annealing spindlevalves to drill holes in them...