In stock
PSA Custom .300 Blackout 10.5" Pistol Length 9" Cross-Cut MLOK SBA3 Pistol w/3.5lb Flat FCG, MBUS, & Ambi Safety - Coyote
In stock

PSA Custom .300 Blackout 10.5" Pistol Length 9" Cross-Cut MLOK SBA3 Pistol w/3.5lb Flat FCG, MBUS, & Ambi Safety - Coyote

SKU 51655112353
Brand PSA Custom
Model Number 51655112353
UPC 51655112353
descriptionProduct Manual
Customers must read Compliance Information before purchasing.

Product Details


  • Chamber: .300 AAC Blackout
  • Barrel Length: 10.5”
  • Gas System: Pistol-Length
  • Barrel Profile: Heavy
  • Barrel Steel: 4150V Chrome Moly Steel
  • Barrel Finish: Phosphate
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24
  • Muzzle Device: PSA Custom .30 Cal Fluted Flash Can
  • Twist Rate: 1 in 8"
  • Barrel Extension: M4
  • Diameter at Gas Block: .750"
  • Gas Block Type: Low-profile
  • Muzzle Device: A2
  • Receiver Material: Forged 7075 T6 Aluminum
  • Receiver Type: A3
  • Handguard Type: PSA Custom 9" Cross-cut MLOK Handguard
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158
  • Bolt Carrier Profile: Full-auto
  • Lower Receiver: Forged 7075 T6 Aluminum
  • Receiver Finish: Teflon-Coated
  • Fire Control Group: PSA Custom 3.5lb Flat Bow FCG
  • Safety: PSA Custom Short/Long Throw Ambi Safety
  • Grip: Magpul MOE Grip
  • Buffer Tube: 7075 T6 Aluminum
  • Adjustment: 6 Position
  • Stock: SBA3 Pistol Brace
  • Magazine: 30 Magpul PMAG


The Palmetto State Armory Custom Series .300 AAC BO MLOK MOE Pistol gives you a tried & true platform with a PSA Custom Series MLOK compatible handguard & a custom finish that is sure to draw attention.


Barrel: 4150V chrome-moly steel. Chambered in 300AA Blackout, with a 1:8 twist rate, M4 barrel extension, pistol-length gas system, & phosphate coated.  This heavy profile barrel is finished off with a PSA Custom M-Lok free-float rail, .750" low-profile gas block, & a .30 Cal A2 flash hider.

 Upper: Forged 7075-T6 A3 AR upper is Teflon Coated.  These uppers are made for us right here in the USA!

Bolt: Full-auto profile bolt carrier group. Shot-peened, mil-spec Carpenter No. 158® steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, & Staked Per Mil-Spec. 8620 steel M-16 profile carrier is nitride treated.

 Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for caliber. Pistol 7075-T6 buffer tube is Teflon-Coated & is fitted with an SBA3 Pistol Brace, Magpul Grip, PSA Custom Short/Long Throw Ambi Safety, & PSA Custom 3.5lb Flat Bow Drop-in FCG.



The Palmetto State Armory Custom Series line of accessories, components, and firearms are designed to give you the tactical or competitive advantage when you need it most!


Q & A

Retail Stock


All NFA Rules Apply.
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.
It is the customer’s responsibility for understanding state laws regarding magazine capacities. Palmetto State Armory abides by all state regulations regarding the sale of high capacity magazines. We DO NOT ship high-capacity magazines with firearms to certain states. We WILL NOT replace high capacity magazines with state compliant magazines. We DO NOT offer refunds in place of the magazines. Please see our terms and conditions for a list or restricted states.
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.
Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to (CA Health and Safety Code Section 25249.6).