AAC MPW 9" 300 Blackout SBR

AAC MPW 9" 300 Blackout SBR

Code: 101999
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Product Description


Description: AAC MPW 9" 300 Blackout SBR. This 30 caliber  rifle the size of an AR15 5.56mm caliber rifle without a reduction in magazine capacity.  The AAC MPW in 300 AAC Blackout uses ordinary 223/5.56mm magazines for a full 30 round capacity. 

This AAC MPW rifle is manufactured with premium components.  The 1:7 twist barrel is nitrided to provide extreme corrosion resistance and high hardness for a long life - outperforming chrome-lined barrels for longevity without the potential impediments to accuracy.  The muzzle is threaded 5/8-24 and includes an AAC 51-tooth BLACKOUT flash suppressor with the complete upper.  A Knight's Armament free floating URX III helps maintain accuracy while providing for the mounting of accessories.  The bolt carrier group's nickel boron UCT EXO coating has a very high hardness and lower friction than either chrome or nickel teflon.  There is also a base layer of high-phosphorous electroless nickel that ensures the extreme corrosion protection that is absent from other Nickel Boron carriers that use a single, thinner layer.  The bolt itself is Carpenter 158 phosphated shot-peened steel to snsure precise dimensions with no concerns for hydrogen embrittlement in the critical lug area.  A Special green o-ring that is tested to no bind even at  -40 degrees F is standard.  The extractor spring is made from premium ultra strong wire and is low fatigue design to ensure the longest possible life. The extractor pin made from 300 ksi S2 tool Steel. 

Finally a properly staked carrier key with Permatex gasket seal compound ensures no gas leakage.  The trigger is a Geissele for great feel and reliabiity.  The stock and pistol grip are by Magpul Industries.

The recommended optional sound suppressor is the AAC 762-SDN-6 which provides an average of 39.3 dB reduction with subsonic ammunition.

**This is an NFA item**

Note: This item will only ship to a Federal Firearms License Dealer (FFL). Before this product is shipped your FFL Dealer must email or fax a valid FFL and SOT to Midwest Gun Works. It is the responsibility of the purchaser, to check your local laws before ordering products from Midwestgunworks.com. Please check your State, County, and City laws for restrictions before ordering.  Please have your FFL dealer fax their FFL to 636-475-7303 or email to ffl@midwestgunworks.com.  When sending the FFL to Midwest Gun Works be sure to include the customer name and order number.


  • Barrel Length: 9"
  • Brand: AAC
  • Caliber: .300 Blackout
  • Finish / Color: Black
  • Firearm Type: Rifle
  • Magazine Capacity: 30
  • Models Fit: AR-15

Rules & Regulations


Firearm Purchasing Policy

Midwest Gun Works sells firearms only in accordance with all Federal, State & Local firearms regulations. Midwest Gun Works will only ship a Firearm to a Federal Firearms License holder (FFL). FFL holder must be located within the United States. We do not and will not ship firearms internationally. In order for Midwest Gun Works to ship your firearm purchase, you must complete the following steps:

  1. Midwest Gun Works must receive a legible and SIGNED copy of the Federal Firearms License from the dealer that will receive the firearm. This can be done via fax, email or standard mail.
  2. Payment must be received via Credit Card

Important note: Please insure that you or your FFL dealer includes your name and order number with FFL when Emailed or faxed.

Please have your FFL dealer email their FFL to ffl@midwestgunworks.com or fax it to 636-475-7303

Please contact us directly if you have any questions pertaining to transaction procedures or details concerning the Firearm being purchased.



Once payment and a signed FFL copy have been received, Midwest Gun Works will then process and prepare the firearm for shipment. All firearms are typically shipped via UPS or USPS Priority Mail. Most shipments going to Alaska or Hawaii will be shipped via USPS. Shipping rates vary according to geographical location and final value of Firearm being purchased. Minimum shipping rates are as follows:

  • Long Guns: Minimum shipping rate is set at $30.00, with any additional charges being added once final value and location of receiver have been established.
  • Hand Guns: Minimum shipping rate is set at $40.00, with any additional charges being added once final value and location of receiver have been established.

* Any additional shipping charges not shown during online check-out will be presented to the customer for approval prior to processing the order.

Once your FFL Dealer receives the firearm, you as the purchaser will then be required to fill out all pertinent paperwork with them in order to take possession of your firearm.

It is the responsibility of the purchaser to make sure that they comply with all federal, state and local laws. If you need more information about restrictions in your area please visit the ATF's website by clicking HERE.

States with applied firearm restrictions:

  • Stripped lower receivers will NOT be shipped to the following states:

    • Connecticut
    • Massachusetts
  • Complete AR and AK receivers will NOT be shipped to the following states:

    • California
    • Connecticut
    • Maryland
    • Massachusetts
    • New Jersey
    • New York
  • Non-Compliant AR & AK models will NOT be shipped to the following states:

    • California (No "assault weapons" can be shipped.)
    • Connecticut
    • Maryland
    • Massachusetts
    • New Jersey
    • New York

Midwest Gun Works DOES NOT ship high-capacity magazines (those greater than 10 rounds) with firearms to the states listed below.

Midwest Gun Works WILL NOT replace high capacity magazines with state compliant magazines.

Midwest Gun Works DO NOT offer refunds in place of the magazines.

States with applied magazine restrictions:

  • California - no magazines greater than 10 rounds
  • Colorado - no magazines greater than 15 rounds
  • Connecticut - no magazines greater than 10 rounds with a valid permit.
  • Hawaii - no pistol magazines greater than 10 rounds
  • Illinois -
    • Chicago, Highland Park, Cook County, Dolton, Homewood & Oak Park- no magazines greater than 10 rounds
    • Aurora - no magazines greater than 15 rounds
  • Maryland - no magazines greater than 10 rounds
  • Massachusetts - no pistol or rifle magazines over 10 rounds and no detachable shotgun magazines over 5 rounds.
  • New Jersey - no magazines greater than 15 rounds
  • New York - no pistol or rifle magazines over 10 rounds and no detachable shotgun magazines over 5 rounds.
  • Vermont - no pistol magazines over 15 rounds and no rifle or shotgun magazines over 10 rounds
  • Washington D.C. - no magazines greater than 10 rounds


  • L.E.Os must provide both their credentials and a letterhead signed by their department's superior officer stating that the firearm will be used in the execution of the L.E.O's duties.
    • Midwest Gun Works only recognizes City Police Officers, County Sheriff Deputies, and State Police (including Highway Patrol) as L.E.Os.
  • Not all of the states listed may have L.E.O. exemptions.
    • Please contact us BEFORE placing your order.
  • Midwest Gun Works does NOT ship directly to L.E.O.; the order must go to an FFL.
    • Midwest Gun Works does NOT make exceptions for this policy.


NFA Information

-Class III items include (but are not limited to): machine guns (MG), silencers (SS), destructive devices (DD), all other weapons (AOW), short-barreled rifles (SBR) and short-barrel shotguns (SBS).

  • SBR: A rifle having a barrel length LESS than 16" and/or an overall length less than 26".
  • SBS: A shotgun having a barrel length LESS than 18" and/or an overall length less than 26".
  • Silencer: Silencer, Suppressor, CAN, Firearm Muffler are all legally the same thing. A Silencer is a device which decreases the sound of the expelled round by more than 3 decibels. NOTHING silences a firearm - Some CANS make firearms sound quieter than others. Very few CANS make a firearm "Hollywood Quiet" - Some do.
  • AOW Usually refers to a firearm that is manufactured to be disguised as something else:
    • Fountain Pen Guns or Walking Cane Guns are classified as AOW's.
    • A pistol having a vertical foregrip attached is classified as an AOW.
    • A smooth bore firearm (Shotguns have stocks), with a barrel less than 18", and came from the factory with only a pistol grip and has NEVER had a stock attached to it, is classified as an AOW Firearm.
    • The NFA transfer tax for an AOW is only $5 not the "normal" $200 tax stamp cost.

-Anyone who is a legal U.S. resident, 21 years of age and older, a non-felon, and lives in one of the states that allow private ownership of a Class III item. Class III items are illegal in the following states: CA, HI, IL, NY, RI & Washington D.C..

-A silenced firearm is eminently more enjoyable to shoot than one without a suppressor. Suppressors generally increase the accuracy of a host firearm while reducing recoil and eliminating up to 90% of the muzzle signature. Shooters are able to concentrate more on breath control and trigger pull when they are not subjected to the fatigue and distraction of a deafening, bright, muzzle report. Beginning shooters are typically not intimidated when introduced to the shooting sports with a suppressed firearm, and are able to easily hear instructions given to them by trainers as the report of a host firearm is reduced to below the OSHA guideline level for hearing damage. Suppressed firearms are also less likely to disturb any people, livestock, or wildlife that may be in close proximity to where you shoot.

-No, you do not need a license to purchase a Class III items but you do have to pay a one-time $200 tax for each Class III item you purchase. You also have to live in a state where Class III items are legal and have to meet certain criteria to be eligible to own one.

-Determine whether or not your state allows you to own a Class III item. Class III items are legal but they are regulated on a per-state basis. However, the National Firearms Act (NFA) branch of the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE) ultimately controls any transfers, and all Class III items are registered by this branch. Individuals, corporations, and trusts can legally purchase and possess Class III items in 45 states. However, if you are a dealer, manufacturer, peace officer, or a law enforcement agency or other government agency, there are additional states where you can own a Class III item.

1. Choosing a product.
2. Locate a class III dealer in your state.
3. After the monetary transaction takes place it will be assigned to you and separated from the rest of the inventory, ensuring that you have a product serial number for your form.
4. Once you have an assigned product serial number, the class III dealer will then give you the ATF Form 4 (5320.4), Application for Tax Paid Transfer and Registration of Firearm, in duplicate with the serial number of the product filled out in the appropriate section. You must fill out the rest of the form in duplicate. You can download the form 4 HERE.
5. You will send in a $200 check or money order with the completed application, along with a recent photo and fingerprint cards. 

1. Obtain the ATF Form 4 (5320.4) (Application for Tax Paid Transfer and Registration of Firearm) from your dealer in duplicate. Some inform's name and address, the model of the Class III item you are purchasing, the overall length of the Class III item, the caliber or gauge of the Class III item, the serial number of the Class III item, and the manufacturer's information. Make sure the dealer signs the appropriate fields. Remember to complete all information in duplicate.
2. Fill out the required information on the front of the form, including your name and address. Complete the back by answering the questions and stating the reason you are acquiring the Class III item. Sign and date the back of the form. Again, remember to complete all information in duplicate.
3. Affix a recent color passport-sized photograph of yourself on the back of each copy of the form.
4. Acquire a signature of the chief law enforcement officer of your county or your local sheriff. Don't let this step scare you; this is a routine request. If you feel that your police chief or sheriff will not sign the Form 4 because of personal or political concerns with the Second Amendment, do not worry. You can bypass them by purchasing the silencer under your Limited Liability Company (LLC) or corporation, or under a trust.
5. While you are at the station obtaining the required signature, ink up your fingers and get two copies of FBI fingerprint cards (FBI Form FD-258) that you will send in with the two duplicates of Form 4.
6. Place both completed copies of Form 4, the two copies of FBI fingerprint cards, and the completed Certification of Compliance form in an envelope, along with a check or money order (payable to Bureau of Alcohol, Tobacco, Firearms, and Explosives) for $200 and mail to the address listed on Form 4. We advise that you use a check and not a money order so you can see when the ATF cashes your check. This is a great way to confirm if the form actually arrived and is being processed. Otherwise, you may just be waiting for two to six months for approval, when, in fact, your paperwork never arrived.
8. After the ATF approves Form 4, they will put a stamp on one of the two copies you sent them and then send it to the dealer where you purchased the Class III item. The dealer will then notify you that the paperwork has returned and that the Class III item is ready to pick up.


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