The firing pin on Nambu's are well known for breaking from being dry fired. Since your getting a spring set be sure it has two new recoil springs in it as the original springs do weaken with age and do not feed rounds from the magazine well.
The firing pin on Nambu's are well known for breaking from being dry fired. Since your getting a spring set be sure it has two new recoil springs in it as the original springs do weaken with age and do not feed rounds from the magazine well.