SilencerCo Delta O-Ring Kit for Sparrow, Warlock II, Spectre II Suppressors

SilencerCo rimfire suppressors like the Sparrow, Warlock II, and Spectre II rely on internal seals to maintain sound suppression and contain blast debris during firing. The SilencerCo Delta O-Ring Kit provides replacement seals to keep your .22 LR suppressor running at peak efficiency. O-rings wear with use—heat cycles, powder residue, and carbon buildup take their toll—so having spares on hand means you can service your suppressor in the field or at the bench without downtime.

This kit contains four high-heat-resistant Viton synthetic O-rings—two size #13 and two size #18—matching the material and specs of the original equipment rings. Viton handles the thermal stress of suppressor operation without degrading, which is why SilencerCo chose it from the factory. Whether you're running a well-used Sparrow through thousands of .22 rounds or rotating suppressors between hosts, having a Delta O-Ring Kit in your range bag or cleaning kit is practical insurance that your suppressor stays sealed tight and quiet.

Installation is straightforward: no gunsmithing required. If you're familiar with basic suppressor maintenance, you can swap rings yourself in minutes. For shooters who run rimfire suppressors regularly—plinkers, match shooters, trainers working through bulk ammunition—this is a consumable worth keeping on stock.

Key Features

• Fits SilencerCo Sparrow, Warlock II, and Spectre II .22 LR suppressors
• Four replacement O-rings per kit: two #13, two #18
• Viton synthetic material—same high-heat-resistant compound as factory rings
• Simple field or bench replacement; no special tools needed

Specifications

Frequently Asked Questions

What suppressors does this O-ring kit fit?

The Delta O-Ring Kit is designed for SilencerCo's Sparrow, Warlock II, and Spectre II rimfire suppressors in .22 LR. It will not fit other brands or SilencerCo suppressor models.

What's included in the kit?

You get four replacement O-rings: two size #13 rings and two size #18 rings. All are made from high-heat-resistant Viton synthetic material, identical to the rings that come from the factory.

How often do I need to replace the O-rings?

O-ring lifespan depends on use frequency and maintenance. The kit gives you spares to have on hand—keep it in your range bag so you can service your suppressor when needed without waiting for parts to ship.

Do I need a gunsmith to install these?

No. O-ring replacement is a basic suppressor maintenance task that most shooters can handle themselves. If you're comfortable cleaning your suppressor, you can install new rings.