Frequently Asked Questions

JP Silent Captured Spring Compatibility
On older Mk1 Mod1 bolt carriers the inside diameter of the was less than the minimum 0.530 inches recommended by JP.
A similar issue occurs with the Armaspec Stealth Recoil Spring.
In early 2018 the inside diameter of the bolt carrier was increased to mil-spec 0.625 inches.
Last updated: 2019-02-17 21:33:45