Hello all,
I'm sure there several hundred builders, of which I'll need to get acquainted and pick from, but I have some general questions on a rifle I want to buy:

1. It SEEMS that if my intention is to shoot sub-sonic (only) out of a .300 AAC, then a 9" 1:8 twist barrel is completely adequate, correct?

2. (if the above is true) I am interested in getting a 9" barreled upper (with appropriate do-dads such as rails, sights, etc) but also with a good suppressor.

3. (considering 1 and 2 above) I believe this means I need to have a LOWER that carries an SBR tax stamp, correct?  And do I need ANOTHER tax stamp for the suppressor, or can I get 2 for 1 in this case?

4. What's the order of events here... apply for the tax stamp first, then purchase the equipment after I receive the stamp, or vice-versa?

Thanks all for your help!!!  I bet there's a FAQ somewhere but I'm not finding it.   :)

look in the armory section there will be a disscution area labeled NFA . you can find the answer to all your questions there.

 HTH

I don't have a 300 so I can't answer the first two, but the third I can help shed some light on.

You can always just build a pistol and do the paperwork for the suppressor. Gemtech and Liberty both have integral 300 uppers that only require a stamp for the suppressor. Personally I'd do a form 1 on a lower and then buy a can separately so that you aren't limited in hosts to suppress.

1: 9 inch and 1:8 are good to go but if you want to shoot bullets heavier than the standard 220gr you can look at a 1:7 twist as most manufactures are going to that twist rate.

2: There are many people who manufacture excellent barrels and there are many threads on this forum about that. A few I like are CMMG, Noveske, AAC and Ballistic advantage. There are many more quality barrels of all price ranges those are just ones that I have owned and liked. If you are looking for a complete upper all of those will work plus look into daniel defense. Many others I am sure will chime in with their favorite upper manufacture.

3: If you put a 9 inch barrel on a lower with a stock that you can shoulder then yes you have to have an SBR lower. There is one way around this tax stamp and that is to make it into a pistol. There are a couple manufactures that make arm braces for the stock that legally cannot be held up to the shoulder but would work half way decent as a stock in a zombie apocalypse.
Each Form 4 needs its own stamp meaning you are going to have to file a form 4 for both the lower and the suppressor paying a $200 stamp tax for each unless of course you go pistol on the lower.

4: Start the SBR and Suppressor early since you are looking at multiple months before they get back to you. You will have to purchase both before starting the paperwork as it needs the serial numbers from each item. The tax stamp is not just some generic stamp it is registered to the suppressor you buy and the lower you register.

The process to start the suppressor is to find a dealer, purchase the suppressor and they tend to do most of the paperwork only requiring you to sign it and get the fingerprints done to send in with the paperwork. The SBR is something you have to initiate with the ATF.

Go into the SBR section and suppressor section of this site and I believe they have a sticky with the process.

OK, good starts and good info, thanks all.  Feel free to keep it coming, though I will go to those other sections of the website to read up.

1:7 is fine, definitely prefer to shoot the heavier bullets.

Seeing as how I have learned that going half-way (pistol route in this case) usually means I spend more later, I'll just go the two stamp route from the beginning.

Good call & for cheap, subsonic plinking ammo that's very accurate (cloverleaf 5rnd groups at 50yrds) & smacks steel hard... check out the 240gr Leatherheads if you reload. Haven't done the math to get the exact cost but figuring around .22 cents a round.

You could also do an integral suppressor that has the outer tube permanently attached to the barrel and have it so the overall length is 16.1" and then you could do only 1 stamp. There are several companies that build them. Also as stated I would gp with 1:7 twist.