Replacement wave spring part for KeyMo and KeyMicro adapters provides essential versatility for maintaining your personal inventory of firearm components. This spring is universally compatible across various adapters, including DA428 Keymo-Hub adapters, DA429 Keymo-Saker adapters and DA451 Key-micro adapters. It also serves as the spring shipped with all Sandman series and Sierra-5 KM suppressors, ensuring consistent performance and reliability in your firearm setup. Ideal for users who prioritize customization and preparedness in their firearms equipment.