The Hiperfire AK4/AK74 Braided Main Spring (XAKMS) is a high-performance tri-twist mainspring designed for AK platform rifles. This spring delivers a 2+ pound pull weight and ensures a hard, positive reset for optimal trigger performance. Engineered for compatibility with the XAK series triggers, this mainspring also fits various stock and aftermarket AK fire controls, making it a versatile upgrade for any AK enthusiast. Keep in mind that pull weight and feel may vary between different receivers and triggers due to the lack of a mil-spec standard for AK platforms. Intended Use: Ideal for enhancing AK trigger responsiveness. Key Benefits: Improves trigger pull weight and reset for better shooting performance. Key Features: - Tri-twist music wire design for durability - Compatible with XAK line of triggers and other AK fire controls - Provides a smoother shooting experience - Lightweight and compact for easy installation Summary: Upgrade your AK rifle with the Hiperfire AK4/AK74 Braided Main Spring for enhanced trigger performance and reliability in any shooting scenario.