AR-15 300 Blackout 5" Pistol Billet Upper / 4" M-LOK / Stay Spooky Color Set

Pistol Kits

AR-15 300 BLACKOUT 5'' PISTOL BILLET UPPER / CH / 4'' MLOK / STAY SPOOKY- COLOR SET

Moriarti Armaments introduces the Stay Spooky 300 Blackout Pistol Upper, a compact, lightweight, and colorful solution for your next AR pistol build. This upper features a 5” 300 Blackout barrel, 4” M-LOK handguard, and a Skull Engraved Dust Cover to keep things mean and memorable. Built around a precision-machined billet upper receiver, this kit is available in bold Cerakote color sets that stand out at the range.

The best part? This upper runs your standard 5.56/.223 bolt carrier group and magazines—no need for proprietary parts. Just drop it on your mil-spec lower and you're good to go.

Included in Upper Assembly:

• Barrel: 5” 300 Blackout, 1:7 Twist, Black Nitride (Made in USA)

• Muzzle Device: A2-Style Brake, 5 Ports, 5/8x24 Thread

• Handguard: 4” Super Slim M-LOK Free Float, Color Matched

• Upper Receiver: AR-15 Billet Cerakote Receiver (Color Matched – Made in USA)

• Gas Block: .750 Low Profile Steel Gas Block w/ Pins & Wrench

• Gas Tube: Proprietary AR Micro-Length Gas Tube

• Crush Washer: AR-15 Tapered, for 5/8x24 Threads

• Charging Handle: Standard Tactical

• Ejection Port Cover: Skull Engraved “Stay Spooky” Dust Cover

Note: BCG not included. Compatible with standard 5.56/.223 AR-15 BCGs. Can be purchased separately.

Available Cerakote Color Sets:

• Burnt Bronze

• Flat Dark Earth (FDE)

• OD Green

• Tiffany Blue (Robins Egg)

• Pink

• Red

Each set includes:

• AR-15 Billet Upper Receiver (Cerakote Color)

• AR-15 4" M-LOK Free Float Handguard (Color Matched)

Compatibility:

• Caliber: .300 AAC Blackout

• BCG Compatibility: Uses standard .223/5.56 bolt carrier group

• Magazine Compatibility: Standard AR-15 magazines

• Lower Receiver: Fits any Mil-Spec AR-15 lower

• Gas System: Micro-Length

Images may not be an exact representation of the product.