The SilencerCo Delta Threaded Rifle Spacer, 1/2×28 (SilencerCo part no. AC114) is a small part that solves a specific fit problem on threaded rimfire rifle barrels. It is used on 1/2×28 barrels where the threads run longer than the recommended 0.400 inch, and it takes up about 0.25 inch of those threads. That lets the suppressor seat fully against the barrel shoulder and stay concentric with the bore. It is a simple spacer, but it keeps a rimfire suppressor mounted the way it was designed to be.

Key Specifications

• Thread pitch is 1/2×28, matching rimfire suppressor direct thread mounts.
• The spacer thickness is 0.25 inch, the amount of excess barrel thread it takes up.
• It is meant for barrel threads longer than 0.400 inch, such as AR-15 length threads on a rimfire barrel.
• Construction is steel with a black oxide finish, a durable surface for a part that sits between barrel and suppressor.
• It threads onto the barrel behind the suppressor, between the barrel shoulder and the suppressor mount face.
• Seating the suppressor against the shoulder keeps it concentric with the bore.

Frequently Asked Questions

When do I need a rifle thread spacer? When a 1/2×28 barrel is threaded longer than the recommended 0.400 inch, the suppressor cannot fully seat. The spacer takes up the extra thread length.

How much thread does the spacer take up? The SilencerCo Delta spacer is 0.25 inch thick and takes up about that much of the thread.

What suppressors can it be used with? It is made for rimfire suppressors that use a 1/2×28 direct thread mount.

Buy the SilencerCo Delta Threaded Rifle Spacer, 1/2×28 Steel

If your rimfire barrel has long AR-style threads, this spacer sets the right mounting length for the suppressor. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more suppressor parts and accessories from SilencerCo while you are there.