Specification information: Alg ak recoil spring is a one of a kind design, it is manufactured from chrome silicon steel resist impact shock and relaxation. The 2 to 3 dead coils in the center change the natural frequency of the spring, which prevents harmonics from damaging the spring and reducing its free length. Mfg: alg defense specs: chrome silicon steel. Reliable & durable rifle recoil springs by ALG. Manufacturer MPN: 4231.
Indicative Price: USD 13.99
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