The SilencerCo ASR 5.56 Flash Hider is a quick-attach muzzle device built for AR-15 shooters who run suppressors regularly. Designed for 5.56mm rifles with 1/2"-28 threaded barrels, this flash hider works as the foundation of SilencerCo's ASR (Active Spring Retention) mounting system — letting you attach and detach suppressors with one hand, no tools required. If you shoot in low-light conditions or need to switch between suppressed and unsuppressed configurations, this muzzle device solves the problem of constant barrel threading and rethreading.

The ASR system's spring-retention design means your suppressor stays put under sustained fire without loosening, and the simple on-off mechanism lets you swap silencers in seconds. The steel construction with matte finish is built to handle the heat and pressure of centerfire rifle use. SilencerCo engineered this platform to work across most of their suppressor line, so your investment in the ASR mount pays dividends if you own or plan to own multiple cans.

Installation is straightforward for anyone comfortable threading a muzzle device. The included shim set and Rocksett allow you to fine-tune the timing if needed, so your suppressor sits exactly where you want it. This is the workhorse choice for serious shooters and hunters who value speed, repeatability, and the ability to move suppressors between rifles without downtime.

Key Features

• Quick-attach/detach design for one-hand suppressor mounting and removal
• Compatible with SilencerCo ASR suppressor line (Specwar, Saker, Hybrid, Omega, Harvester)
• Steel construction with matte finish for durability and corrosion resistance
• Active Spring Retention system holds suppressors securely under heavy fire
• Reduces muzzle flash to protect your night vision in low-light shooting
• Includes shim set and Rocksett for alignment and installation

Specifications

Caliber	5.56mm/.223
Thread Pattern	1/2"-28
Firearm Platform	AR-15
Material	Steel
Finish	Matte
Mount System	ASR (Active Spring Retention)

Frequently Asked Questions

Which SilencerCo suppressors work with the ASR 5.56 Flash Hider?

The ASR flash hider is compatible with SilencerCo's ASR suppressor line, including the Specwar, Saker, Hybrid, Omega, and Harvester models. The ASR mounting system allows you to use any of these suppressors interchangeably on the same flash hider.

Can I switch suppressors without removing the flash hider from my barrel?

Yes. The ASR system is designed for quick attachment and detachment. You keep the flash hider permanently threaded to your barrel and swap suppressors with one hand, no tools needed.

What's included with the ASR 5.56 Flash Hider?

The package includes the flash hider, a shim set for timing adjustments, and Rocksett for installation. The shims allow you to fine-tune the suppressor's rotational position on the hider for proper alignment.

Will the suppressor stay tight during heavy sustained fire?

The Active Spring Retention design is engineered to prevent the suppressor from loosening during sustained fire. The mechanical spring system holds the attachment securely throughout extended shooting sessions.