The SI Carbine Flatwire Spring is an economical, easy upgrade to any AR system with a carbine buffer system. The flatwire spring increases service life of the platform, smooths out the shooting cycle, and greatly outlasts the stock spring. Increased bolt load, in addition to decreased compression force increases reliability in cycling.

• Type: Recoil Spring
• Model: Flat Wire Spring
• Material: Stainless Steel
• Finish: Stainless Steel

*Item must be returned in unused condition and in the original manufacturer's packaging (if applicable). If an item arrives non-defective and accurate to its description, this guarantee does not apply and returns will not be organized in those situations. Please confirm compatibility and specifications with us regarding item Strike Flat Wire Spring Silver Stainless Steel before purchasing if you are unsure.