Description
Ready for a suppressor with maximum subsonic accuracy.
Nothing feels better than putting together a new AR, sending some rounds downrange, and ringing steel – especially with a suppressor muffling subsonics. That’s exactly what this 300 BLK AR pistol kit is intended to do: Its 7.5″ heavy barrel, featuring a 1:8 twist rate and pistol gas system, is ready to reliably and accurately cycle both supersonics and subsonics, with or without a suppressor, providing tight groupings that are whisper-quiet.
What’s Included
This is not a firearm. It includes an assembled upper receiver, bolt carrier group, charging handle, lower parts kit, and buffer system.
300 BLK Pistol Upper Assembly Specs
Barreled uppers are assembled in-house before shipment.
Barrel
- Chamber: .300 AAC Blackout
- Contour: Heavy
- Length: 7.5″
- Twist Rate: 1:8
- Gas System: Pistol
- Gas Block: 0.750″
- Muzzle Threads: 5/8×24
- Feed Ramps: .30 Cal
- Material: 4150 CMV
- Finish: Parkerized
- Process: Button Rifled
- Lining: None
- Extension: M4
- Muzzle: Fluted Flash Hider
Handguard
- Attachment System: 6.5″ M-LOK
- Finish: Type III Hardcoat Anodized (Mil-Spec)
- Top Rail: M1913 Picatinny
- Material: Billet 6061-T6 Aluminum
- Attachment: Barrel Nut
Upper Receiver
- Profile: M4 Flattop
- Material: Billet 6061-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
- Profile: M16/Full-Auto
- Steel: AISI E9310
- Exterior: Black Nitride
- Interior: Black Nitride
- Gas Key: Staked
- Charging Handle: Included, Right Side Charging
Lower Receiver Parts
- Buffer System: AR-15
- Pistol Brace: SBA3 5-Position
- Parts Kit: Mil-Spec LPK
Lower receiver assembly sold separately.
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Platform:
- AR15
- Caliber:
- .300 AAC Blackout
- Barrel Size:
- 7.5″
- Barrel Finish:
- Parkerized
- Twist Rate:
- 1/8
- Platform:
- AR15
- Caliber:
- .300 AAC Blackout
- Barrel Size:
- 7.5″
- Barrel Finish:
- Parkerized
- Twist Rate:
- 1/8
Frequently Asked Questions
- How fast is shipping?
- Orders ship within 3 business days to your selected Michigan FFL dealer with full tracking info.
- Where can I pick up my firearm?
- Pickups are at licensed FFL dealers in Michigan. Use terms like “gun shop near me in Michigan” or “FFL dealer in Michigan” to locate one.
- Do I need a permit or license?
- For handguns, residents must obtain a License to Purchase (unless they already hold a CPL). Long guns from FFL dealers require no additional permits—per Michigan law.
- Can I carry this concealed or openly?
- Michigan is a “shall-issue” state for concealed carry at age 21+. Open carry is allowed without a permit, except in vehicles or specified locations :contentReference[oaicite:20]{index=20}.
- Is this .300 Blackout AR 15 Pistol Kit - 7.5" Parkerized Heavy Barrel, 1:8 Twist Rate with 6.5" MLOK Handguard right for me?
- Our .300 Blackout AR 15 Pistol Kit - 7.5" Parkerized Heavy Barrel, 1:8 Twist Rate with 6.5" MLOK Handguard is ideal if you’re shopping for: .300 Blackout AR 15 Pistol Kit - 7.5" Parkerized Heavy Barrel, 1:8 Twist Rate with 6.5" MLOK Handguard, AR Build Kits. Great options for both beginners and experienced owners.
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Frequently Asked Questions
- How fast will my order ship?
- We ship all orders within 1-3 business days to your licensed Michigan FFL dealer. Tracking info will be emailed.
- What is your return policy?
- Non-firearm items can be returned within 14 days unused. Firearms sales are final after FFL transfer. See full return policy.
- Is the .300 Blackout AR 15 Pistol Kit - 7.5" Parkerized Heavy Barrel, 1:8 Twist Rate with 6.5" MLOK Handguard suitable for me?
- Our .300 Blackout AR 15 Pistol Kit - 7.5" Parkerized Heavy Barrel, 1:8 Twist Rate with 6.5" MLOK Handguard is popular among Michigan customers for personal defense and sport shooting.
