PSD 9.5″ .300BLK One-Stamp Upper (GP-7™ Silencer)
Experience superior tactical performance, engineered precision, and exceptional reliability with the PSD 9.5″ .300BLK One-Stamp Upper (GP-7™ Silencer). Crafted to exact industry standards, this product delivers uncompromised durability and effectiveness in the field.
Features & Performance Overview
The PSD 9.5″ .300BLK One-Stamp Upper (GP-7™ Silencer) is designed for tactical operators, target shooters, and firearm enthusiasts seeking peak functionality. Every component undergoes rigorous testing to guarantee durability, smooth operation, and optimal safety.
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Detailed Product Description
Griffin suppressed uppers ship from the factory with the suppressor pinned and welded to the barrel to achieve a non NFA (non SBR) regulated overall barrel length of +16″ per ATF regulations.
This MK1 PSD 9.5″ .300BLK One-Stamp Upper comes from the factory with a GP7™ Suppressor pinned and welded to the barrel, requiring a tax stamp for the suppressor only – hence the “One-Stamp” designation in conjunction with permanent attachment to a barrel typical in use on SBR’s. This upper makes an ideal home defense firearm, and ensures end user hearing protection. GP™ suppressors offer sub-OSHA 140DB impulse risk limit, sound performance at minimal weight with high durability. The latest generation of GP™ suppressors are tubeless in construction, yielding lighter weights than previous GP™ suppressor generations, while maintaining their full-auto durability rating with no minimum barrel length restrictions. This latest generation GP7™ Suppressor incorporates a flash-hiding end cap design borrowed from the popular EXPLORR® family of suppressors.
One-Stamp uppers feature Griffin’s Suppressor-Ready Rail system which overhangs the suppressor, creating a unique, integrally-suppressed look, with more handguard length for muzzle control. The complete uppers are ready for use right out of the box, and include Griffin’s Enhanced Mil-Spec BCG, SN-ACH™ 15 Charging Handle, M2™ flip-up Iron Sights, PRIMO Gas Block™, and 4-piece Rail-Shield™ furniture kit. This upper features Griffin’s 9.5″ HEDP™ .300BLK Barrel made from nitrided 416R Stainless Steel which provides incredible accuracy with maximum lifespan. TRUE-BORE™ concentric suppressor-grade threads provide an optimized interface for pinning and welding the GP7™ Suppressor providing guaranteed concentric suppressor alignment.
Griffin’s One-Stamp uppers offer premium features and reliability to each user, with the ease and simplicity of having a one-stamp build without the need for multiple tax stamps.
Features:
- Pistol-Length Gas System
- GP7™ Suppressor Pinned & Welded
- .300BLK Polished Chamber and M4 Feed Ramps for Optimal Accuracy
- User’s Choice of Rail-Shield™ Furniture Color (Black, FDE, ODG, or Grey)
- High-Accuracy/Durability 416R Stainless Steel HEDP™ Barrel
- Air Gauged & Hand-Lapped Bore
- Reaches Overall Barrel Length of +16″
- Suppressor-Optimized Gas Block, Ports, and Charging Handle
- Melonite QPQ-Finished Griffin Enhanced Mil-Spec BCG Comprised of: 8620 carrier, C-158 (Carpenter) Bolt, and 4340 Cam Pin & Extractor
Parts List:
- GP7™ Suppressor – Pinned & Welded
- Griffin 9.5″ .300BLK HEDP™ Barrel with TRUE-BORE™ Suppressor Threads
- Griffin 12.5″ SR Rail System
- Griffin PRIMO™ Gas Block .750″ (Pinned)
- Carbine-Length Standard Profile Gas Tube
- Griffin Rail-Shield™ 4-Piece Hand Guards Kit
- Griffin Enhanced Mil-Spec BCG
- Griffin Suppressor-Normalized Ambidextrous Charging Handle (SN-ACH™)
- Griffin M2™ Low-Profile Flip-Up Iron Sights
- Griffin Assembled Upper Receiver

















