QDB Flow Streamer | Silent Steel

The Silent Steel QDB Flow Streamer is a full-size modular rifle suppressor equipped with Silent Steel’s Boltlok™ Quick-Attach System (QDB). The Flow Suppression Unit is designed for gas-operated self-loading rifles. Its flow-through design reduces back pressure, minimizes gas exposure to the shooter, and prevents increased weapon fouling. No adjustable gas block or other gas-system adjustments are required. The Streamer features a modular and multi-caliber construction. The suppression unit can be easily removed and replaced, allowing the suppressor caliber to be changed when required. The Streamer is available with either an Aluminum or Stainless Steel body. The Stainless Steel body with Flow Suppression Unit is full-auto rated. The Aluminum body is recommended only for 9.00 mm PCC carbines and single-shot rifles.

The Boltlok™ Quick-Attach System (QDB) is Silent Steel’s patent-pending suppressor mounting system designed to provide a lightweight, secure and stable attachment. During initial installation, the locking tension can be adjusted for the tightest possible fit. The locking mechanism features six positive locking positions, allowing the optimal setting to be selected during initial setup. Once adjusted, operation is quick and straightforward: attach the suppressor and slide the locking latch fully rearward for a secure and repeatable lock-up.

Key Features

• Boltlok™ Quick-Attach System (QDB)
• QDB mount adds only 20 g
• Secure and repeatable lock-up
• User-adjustable locking tension
• Six positive locking positions
• Flow-through suppression technology
• Reduced back pressure
• Reduced gas exposure to the shooter
• No adjustable gas block or other gas-system adjustments required
• No increased weapon fouling
• No significant increase in bolt velocity
• Full-auto rated with Stainless Steel body
• Advanced heat management
• Passes SOCOM stress test cycles
• Effective flash suppression
• Modular and multi-caliber construction
• Caliber can be changed by replacing the suppression unit
• Fully serviceable and easy to disassemble for cleaning
• Replaceable parts
• No minimum barrel length restrictions

Technical Specifications

• Length: 195 mm
• Diameter: 42 mm
• Mounting system: QDB Boltlok™ Quick-Attach System
• QDB added weight: 20 g
• Body materials: Stainless Steel / Aluminum
• Flow Suppression Unit material: 303 Stainless Steel
• Available Flow calibers: 4.6 mm / 5.56 mm / 7.62 mm / 9.00 mm
• Stainless Steel finish: Cerakote – Armor Black / Magpul FDE / Magpul OD Green
• Aluminum finish: Black anodized
• Sound suppression: 15–36 dB
• Full-auto rated: Stainless Steel body with Flow Suppression Unit
• Aluminum body: Recommended only for 9.00 mm PCC carbines and single-shot rifles
• Included: Storage pouch and Front Cap Key (FCK)