The SilencerCo Delta O-Ring Pack (SilencerCo part no. AC87) is a set of four replacement o-rings built for the SilencerCo Sparrow, Spectre II, and Warlock suppressors. Direct-thread and mount o-rings wear out over time from heat and repeated mounting, so keeping a spare set on hand means a suppressor doesn’t get sidelined waiting on a replacement part. This pack is sized specifically for these three SilencerCo models, so it’s not a generic universal o-ring kit. It’s a small, inexpensive way to keep a suppressor mount sealing correctly.

Key Specifications

• Replacement o-rings for the SilencerCo Sparrow, Spectre II, and Warlock suppressors.
• Sold as a 4-pack.
• Contains two #13 o-rings and two #18 o-rings, the two sizes used across these suppressor mounts.
• Molded from Viton, a heat-resistant synthetic rubber that holds up to repeated blast exposure.
• Sized for SilencerCo’s own mount hardware, not a universal fit.
• Weighs about 0.015 lb, a negligible-weight spare part.

Frequently Asked Questions

Will these o-rings fit other SilencerCo suppressors? No, this pack is sized specifically for the Sparrow, Spectre II, and Warlock models.

How many o-rings come in this pack? Four.

Buy the SilencerCo Delta O-Ring Pack

Keep a spare set of mount o-rings on hand with this pack from Silencer Co in our Class 3 parts and accessories selection. Order it from our Lubbock, Texas gun shop for fast, direct shipping right to your door.