The Strike Industries AR Lower Receiver Spring Kit provides a complete set of the most commonly replaced springs for AR-15 and M4 lower receivers. Each kit includes dedicated springs for the bolt catch, disconnector, buffer retainer, trigger, hammer, magazine catch, selector, and two detents, giving builders and armorers a reliable way to refresh worn components and keep rifles running smoothly.

This compact kit is ideal for anyone assembling stripped lowers, performing routine maintenance, or keeping spare parts on hand for training and range use. With all critical lower receiver springs grouped together, it simplifies repairs and minimizes downtime when a small part goes missing. Backed by Strike Industries’ reputation for thoughtful design and practical innovation, this spring kit is a straightforward upgrade to any AR-15 parts bench.

Key Features:

• Manufacturer: Strike Industries
• Model: AR Lower Receiver Spring Kit
• Firearm Type: AR-15/M4
• Includes: Springs for bolt catch, disconnector, buffer retainer, trigger, hammer, magazine catch, selector, and two detents
• Use Case: Ideal for building stripped lowers, routine maintenance, and keeping spare parts available