The SilencerCo Delta Adapter for the S&W M&P 22 Compact (brand part no. AC875) converts the pistol’s factory 3/8×24 muzzle threads to the more common 1/2×28 pattern in seconds, using SilencerCo’s o-ring engagement system to keep threads clean and the suppressor from working loose under firing. It is built specifically for the .22 LR M&P 22 Compact and is compatible with SilencerCo’s Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22 suppressors. Rather than swapping barrels or sending a pistol out for threading, shooters can mount a rimfire suppressor directly with this adapter. It is a Title I accessory, not a suppressor itself, and does not require an NFA transfer.

Key Specifications

• Built for the .22 LR S&W M&P 22 Compact pistol.
• Converts the factory 3/8×24 thread to the common 1/2×28 pattern.
• Uses o-ring engagement to keep muzzle threads clean and the suppressor from loosening under firing.
• Compatible with SilencerCo’s Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22 suppressors.
• Installs in seconds, getting a factory M&P 22 Compact suppressor-ready without gunsmithing.
• Part of SilencerCo’s Rimfire Delta accessory line.

Frequently Asked Questions

Is this adapter itself an NFA item? No, it is an ordinary Title I accessory that adapts thread patterns; only the suppressor it is paired with is a regulated NFA item.

What thread pattern does it convert to? It converts the M&P 22 Compact’s factory 3/8×24 thread to the common 1/2×28 pattern used by most .22-caliber suppressors.

Which suppressors is it compatible with? SilencerCo’s Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22.

Buy the SilencerCo Delta Adapter

Get your M&P 22 Compact suppressor-ready with this SilencerCo adapter, part of our Class 3 parts and accessories lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping.