SilencerCo Delta Thread Spacer .22 LR 1/2x28 Steel Black Oxide

The SilencerCo Delta Thread Spacer is a precision-fit mounting accessory for .22 LR rimfire silencers using the Delta thread system. Machined from durable steel with a black oxide finish, this spacer installs between the barrel shoulder and the suppressor to take up excess thread length on host barrels where the threads are longer than the recommended .400" standard.

The spacer occupies roughly .25" of thread engagement, allowing the suppressor to index properly and shoulder squarely against the barrel face rather than bottoming out on extra threads. This ensures consistent lockup, repeatable point of impact, and full thread contact between the suppressor and barrel - critical for both sound performance and safe mounting on a rimfire host.

Designed for use on 1/2"-28 threaded barrels (the standard rimfire thread pitch), the AC114 spacer is compatible with SilencerCo Delta-mount rimfire suppressors including the Sparrow and Switchback. It is an ideal solution for AR-style .22 LR uppers and other rimfire builds with extended muzzle threads that need to be shortened back to a proper rimfire shoulder.