Yeh Update: Sorry
1. Check michgan laws about silencers (can you own one)
2. Send your upper to a gunsmith and have them press that POS off. Thread your barrel and add a FS of your choice. ADCO just did mine. $69 for shipping (back) and labor (no parts)
3. Then do some research on silencers pick one, find a distributor pay for it. I like the Advanced Armament models They range in price.
4. Go to the ATF's website download the apporiate form. Fill it out (making no mistakes). Get two passport photos and get finger printed on two FBI finger print cards (the blue ones) then have the local law enforcement chief/sheriff sign your form.
5. Send this form along w/ $200 dollars to the BATFE and wait approx 22 weeks (that was how long I waited)
As long as you have the time and the money. The wait isn't that bad. Just follow the instructions on the form to a "T".