Stratus “Customizable” SB390 300 Blackout 9″ Pistol


The Stratus SB390 Pistol

SKU: SB390 Category:


The Stratus SB390 is our rock solid 300 Blackout 9″ pistol platform rifle. The SB390 is an Optics Ready pistol that features our 9″ 1:7 twist, 5R, Nitride finished barrel with a pistol length gas system. That barrel is headspace to your choice of our Bolt Carrier Groups which are properly staked using grade 8 fasteners. The upper and lower receivers are hand selected to ensure the best fit for this pistol.

Barrel 9″, 300BLK, 1:7, Pistol Length
Gas Block Low Profile, .750
Gas Tube Nitride, Pistol length
Handguard SLR ION 8″ Lite MLOK or KM
Muzzle Device A2 Flash Hider w/ Crush Washer
Upper Receiver Stratus, 7075-T6 Forged Aluminum
Lower Receiver Stratus SB-15, 7075-T6 Forged Aluminum
Receiver Extension Tubes Pistol, 7075-T6 Aluminum
Buffer Heavy
Buffer Spring SprinCo Blue


***Please include you FFL’s name and phone number in the “FFL Information” or the “Order Notes” section on the checkout page. If you miss this step or haven’t determined which FFL you intend to use yet that’s ok, you can email us that information afterwards at and we’ll take it from there.

SHIPPING RESTRICTIONS: This product must be shipped to a Federal Firearms Dealer inside the US. We do not ship to California, Connecticut, Massachusetts, Maryland, New Jersey, New York, or Washington DC.


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