The Sprinco hammer spring takes the mil-spec hammer spring to the next level. It meets all TDP specifications but is held to a tighter tolerance than traditional springs, bringing them closer to “nominal” weight, meaning a more consistent spring rate. You will notice that special attention is paid to making sure the spring lays perfectly flat, ensuring that it has enough power to ignite tough 5.56 primers compared to springs that are already slightly relaxed from the factory.
Additionally, these springs are cryogenically treated, making them last 3-5 times longer than a standard hammer spring.
17-4 Stainless Steel wire
Heat and cryogenically treated