Rifle HAR Custom Build HARC021

AR-15 Pistol HAR CQB 8″ .300 Blackout

Built to order Available

FFL transfer required. Configured as a pistol per ATF definitions. Available in pistol or SBR configuration.

An 8″ .300 Blackout AR pistol purpose-built to run suppressed: short, quiet, and braced, with an enclosed Holosun dot and offset light tuned for confined-space defense.

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Reference HARC021 travels with your message.

Specifications

Caliber
.300 AAC Blackout
Barrel Length
8 in
Twist Rate
1:7
Gas System
Pistol-length, adjustable
Overall Length
24 in (brace collapsed)
Weight
5.7 lb (bare)
Finish
Type III hard-coat anodized / Cerakote Tungsten

Build Components

  • Barrel Horizon Arms Research

    8" 1:7 button-rifled, pistol gas, suppressor-ready threading

  • Handguard Horizon Arms Research

    9.5" free-float M-Lok, slim profile

  • Trigger CMC

    Single-stage flat drop-in, 3.5 lb

  • Optic Holosun

    HE508T-RD X2 enclosed titanium red dot, 2 MOA

  • Brace SB Tactical

    SBA3 adjustable pistol stabilizing brace

  • Muzzle Device Dead Air

    Xeno flash hider / suppressor mount

  • Light Streamlight

    ProTac Rail Mount HL-X on offset mount

The Build Story

A suppressor host from the ground up

.300 Blackout at 8” is one of the most efficient cartridges ever fielded for a short, quiet, braced platform. We built this pistol around the can: pistol-length adjustable gas, suppressor-ready threading, and a buffer system tuned to cycle subsonic loads cleanly. It’s the home-defense and confined-space answer when blast and length both matter. Available in pistol or SBR configuration, set to your legal setup at order.

Enclosed optic, offset light, ready to run

The Holosun HE508T enclosed titanium dot shrugs off lint, weather, and abuse, and rides co-witnessed and zeroed out of the shop. The Streamlight HL-X sits on an offset mount to keep the package short and the controls clean. Every accessory is installed and proven as part of the weapon, not bolted on as an afterthought.

Boutique build, proven before it ships

Hand-assembled, torqued, staked, and run through a suppressed and unsuppressed live-fire shakedown so we know it cycles both. This is the kind of short, quiet platform our founders trusted on the job. We won’t ship one that hasn’t earned it.

Ready to make this one yours?

Builds are configured to order around how you'll actually carry and use them. Start a conversation and we'll spec it with you.

Inquire About This Build