SILENCERCO AC3 DELTA ADAPTER 1/2X28

The SilencerCo AC3 Delta Adapter 1/2x28 is a quick-change threading solution that converts your .22 caliber barrel from standard 1/2x28 threads to a suppressor-ready configuration in seconds. If you run a .22 suppressor on multiple hosts or want to swap between suppressed and unsuppressed shooting without changing barrels, this adapter bridges that gap cleanly and reliably.

What sets the Delta Adapter apart is its o-ring engagement system. That o-ring does two things: it keeps your muzzle threads clean between use and prevents your suppressor from loosening under recoil. Over a shooting session, vibration can work a suppressor loose on a bare-threaded barrel—the o-ring engagement eliminates that headache. At 0.4 inches long (shortened from the standard 0.6 inches), it adds minimal length to your setup while maintaining a secure connection.

The 1/2x28 Delta Adapter works with SilencerCo's .22 suppressor lineup, including the Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22. It's the kind of accessory that makes sense if you're serious about .22 suppression and want gear that stays put.

Key Features

• O-ring engagement keeps muzzle threads clean and suppressor secure under firing
• Quick-change design for rapid barrel or suppressor swaps
• Compact 0.4-inch length minimizes added profile
• Compatible with major SilencerCo .22 suppressors

Specifications

Frequently Asked Questions

What SilencerCo suppressors does this adapter fit?

The 1/2x28 Delta Adapter is compatible with the Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22.

Will my suppressor stay tight if I use this adapter?

Yes. The o-ring engagement system prevents your suppressor from loosening under firing vibration, a common issue with standard threaded connections.

How much length does this add to my barrel?

The Delta Adapter is 0.4 inches long, making it one of the more compact threading solutions available.