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It is the customer's responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16". Federal NFA regulations are applicable to this item.

SKU: 5165449220
UPC: 5165449220
MFR#: 5165449220

- Barrel Length: 8.5"
- Barrel Profile: Heavy
- Gas System: PIstol-length
- Barrel Steel: 4150V Chrome Moly Vanadium
- Barrel Finish: Phosphate
- Chrome Lining: No
- Muzzle Thread: 5/8-24
- Chamber: 300AAC Blackout
- Twist Rate: 1:8
- Barrel Extension: M4
- Diameter at Gas Block: .750
- Gas Block Type: Low-profile
- Muzzle Device: A2 Flash Hider
- Receiver Material: Forged 7075 T6
- Receiver Type: M4
- Hand guard Type: PSA 7" M-Lok Rail
- Bolt Carrier Group Included: Yes
- Bolt Steel: Carpenter 158
- Bolt Carrier Profile: Full-auto
- Charging Handle included: Yes
- Build Kit: Classic SOB Pistol Build Kit, Black

Barrel: 8.5" Phosphate 4150V Chrome Moly vanadium steel barrel, chambered in 300AAC Blackout with a 1 in 8" twist. Pistol length gas barrel is finished off with a PSA 7" M-lok Rail, a low profile gas block and an A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. Featuring a mil-spec finish, these uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphate coated and chrome lined. 

Build Kit: A high quality lower build kit with everything you need to assemble your AR-15 lower into a pistol. Pistol kit includes a mil-spec fire control group, SOB pistol brace, PSA pistol buffer tube, A2 classic grip, USGI trigger guard, carbine buffer spring, and standard carbine buffer.

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Comments (4)

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To install the sob brace I heated it up with a hair dryer fyi

1 vote
0 votes

The SOB brace was kind of cheap feeling and thin in places over the buffertube, I’d look into the SBA3 seems to be a lot better.

1 vote
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Why the 1/8" twist though? If it were a 1/7" twist I would have bought it.

0 votes
0 votes

The blackout was designed for a 9 inch barrel. I get outstanding accuracy with my 8.5 inch barrel.

2 votes
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