AAC SR-5 5.56mm 90T Taper Mount Fast Attach Silencer

Description

The AAC SR-5, 5.56mm 90T TAPER Mount Fast Attach Silencer is a hard-use, quick-detach suppressor designed for 5.56mm rifles. It uses a proprietary 90-tooth taper mount system for a secure, repeatable lock-up that handles the high pressure and heat of rapid fire. This silencer is built for duty, competition, and serious defensive use where reliable performance under stress is non-negotiable.

Key Features

• 90T Taper Mount System: Provides a rock-solid, concentric lock-up with a simple 1/4-turn attachment. It’s designed to stay put under recoil and heat, eliminating point-of-impact shift.
• Fast-Attach Design: Go from suppressed to unsuppressed in seconds without tools. This is critical for transitions or when a compact profile is needed.
• Full-Auto Rated Construction: Built with a Stellite blast baffle and 17-4 PH stainless steel internals to withstand sustained fire. It’s not a range toy; it’s built for hard use.
• Optimized for 5.56mm: Engineered specifically for the 5.56x45mm/.223 Remington cartridge, balancing sound reduction, backpressure, and durability for the platform.

Specifications & Details

Caliber	5.56mm / .223 Remington
Length	7.5 inches
Diameter	1.5 inches
Weight	17.5 ounces
Mount System	AAC 90T Taper Mount (Muzzle Device Required)
Construction	Stellite Blast Baffle, 17-4 PH Steel, Titanium Tube

Weighing in at 17.5 ounces, the SR-5 adds minimal front-end heft to your rifle, keeping it maneuverable in tight spaces. The 7.5-inch length is a practical compromise, offering effective suppression without turning your carbine into an unwieldy polearm. The core advantage is the mount—once you install the compatible 90T muzzle device on your barrel, the suppressor itself is drop-in ready. No timing shims, no rocksett, no guesswork. It simply clicks on. This system is mil-spec compatible, proven on military rifles, and translates directly to reliable civilian use. The price point of $798.06 reflects this professional-grade construction and the extensive R&D behind the mount system.

Who This Silencer Is For

This is for the shooter who views their rifle as a tool for a potential fight, not just a plinker. It’s for the competitor running dynamic carbine matches where seconds count and gear must work every time. It’s for the landowner who needs to dispatch pests without disturbing the neighbors. If your use case involves adrenaline, high round counts, or a genuine need for hearing preservation in a defensive scenario, the SR-5 is engineered for you. It pairs seamlessly with common platforms like the Daniel Defense DDM4 or any mil-spec AR-15 upper once the correct muzzle device is installed.

Pros & Cons

Pros: The fast-attach system is incredibly robust and user-friendly—no gunsmithing required to attach or detach. The full-auto rating means you can trust it during rapid strings of fire without babysitting it. Sound reduction is effective, taking the 5.56’s crack down to a more manageable level, especially with supersonic ammunition. Durability is a hallmark; this can is built to last a lifetime of serious use.

Cons: Here’s the thing—you must use AAC’s 90T muzzle devices. This creates a proprietary ecosystem, so if you have other brand suppressors, you’ll be swapping muzzle brakes. At 17.5 ounces, it’s not the absolute lightest option on the market, though the weight is justified by the materials. Like all 5.56 cans, it won’t be “Hollywood quiet” with supersonic rounds, but it achieves the practical goal of hearing-safe attenuation and signature reduction.

Frequently Asked Questions

Q: What muzzle device do I need to use this suppressor?

A: You need an AAC 90T Taper Mount muzzle brake or flash hider. The suppressor itself does not include one, so you must purchase the appropriate 90T device for your rifle’s thread pitch (common is 1/2×28). Once installed, the SR-5 attaches directly to it.

Q: Is this suppressor compatible with .300 Blackout?

A: While it is physically capable of handling subsonic .300 Blackout rounds, it is optimized and rated for 5.56mm. For dedicated .300 Blackout use, a caliber-specific model is generally recommended for peak performance. Always consult the manufacturer’s specifications for your intended ammunition.

Q: What is the process to purchase this?

A: As a National Firearms Act (NFA) item, purchasing a silencer requires filing a Form 4 with the ATF, which includes a background check, fingerprinting, and a tax stamp payment. We guide you through the entire process. This item ships to Missouri and compliant US states after the approved Form 4 is received.

Ready to integrate professional-grade suppression into your rifle system? Start the process by contacting us for details on the required 90T muzzle devices and the NFA transfer procedure.