ALG Defense AK Main Spring - Braided. This replacement option is made in specialized factories from three strands of music wire braided together. Specifications for ALG Defense AK Braided Main Spring: Manufacturer: ALG Defense Color: Steel Gun Model: AK-74 AK-47 Additional Features: Braided Package Contents: ALG Defense AK47/74 Braided Main Spring What firearm models does the manufacturer say ALG Defense AK Braided Main Spring is compatible with? The manufacturer suggests that ALG Defense AK Braided Main Spring is compatible with AK-47 AK-74ALG Defense 04-232-F: AK Main Spring - Braided