Q HB-300BLK-7IN-HBSIL 300B 7" SBR GRY/BLK (1OF2)

The Q HB-300BLK-7IN-HBSIL is a short-barrel rifle (SBR) in 300 Blackout built for shooters who demand compact firepower without compromise. At 7 inches, this rifle excels in tight quarters—whether you're navigating dense timber, setting up in a vehicle, or running drills at close range. The 300 BLK cartridge delivers serious stopping power at intermediate distances while keeping recoil manageable, making this SBR a natural fit for home defense, truck guns, and tactical training.

The receiver is machined from 7075 aluminum with hard-coat anodizing for durability that shrugs off daily abuse. The free-floating 6061 aluminum handguard rides M-LOK, giving you clean mounting options for lights, lasers, and hand stops without the clutter of traditional rail systems. Under the hood you'll find an adjustable low-profile gas block tuned for SBR reliability, a 2-stage trigger that breaks clean, and all the familiar AR controls you already know. The muzzle is threaded 5/8-24, ready for suppressors or flash hiders.

The 2-position collapsible PDW stock collapses tight for vehicle stowage or rapid movement and extends for a solid cheekweld when you need it. The 70-degree safety selector sits within natural reach. Whether you're building a dedicated home-defense platform, stashing a short rifle in your truck, or exploring SBR-platform shooting, the Q HB-300BLK gives you a modern, modular foundation backed by Q's reputation for precision engineering.

Key Features

• 300 Blackout caliber—intermediate power, mild recoil, suppressor-ready
• 7-inch barrel—compact profile for confined spaces and vehicle carry
• 7075 aluminum hard-coat anodized receiver—durable, lightweight
• Free-floating M-LOK handguard—minimal harmonics, clean accessory mounting
• Adjustable low-profile gas block—tuned for SBR performance and reliability
• 2-position PDW collapsible stock—compact storage or extended shooting position
• 2-stage trigger—predictable break for accuracy
• 5/8-24 threaded muzzle—suppressor and accessory ready
• AR-standard controls—familiar ergonomics and operation

Specifications

Frequently Asked Questions

Is this SBR suitable for suppressed shooting?

Yes. The 300 Blackout cartridge is optimized for subsonic loads paired with suppressors, and the 5/8-24 threaded muzzle accepts most common suppressors. The adjustable gas block gives you the tuning flexibility you need to run both supersonic and subsonic ammunition reliably.

What's the difference between the 7-inch barrel and longer options?

The 7-inch barrel maximizes the compact footprint—ideal for vehicle carry, tight building entries, and close-quarters work. You're trading some velocity and sight radius for serious portability; the 300 BLK platform is designed to perform at intermediate distances where this trade-off makes sense.

Does the stock collapse enough for vehicle storage?

The 2-position collapsible PDW stock collapses to its minimum length, though the exact collapsed dimension isn't provided here. For your specific vehicle fit, measure your available space and verify against the collapsed length at your dealer or with the manufacturer.

What controls does it use?

All AR-standard controls—charging handle, bolt catch, magazine release, and the 70-degree safety selector will be instantly familiar if you've run modern AR-platform rifles. No learning curve, fast transitions.