TacFire Takedown/Pivot Pin Detent and Spring Features The TacFire Takedown/Pivot Pin Detent and Spring set pairs a brass pin with a stainless steel spring in each set giving the detent system the corrosion resistance and spring endurance needed for repeated takedown and reassembly. These small parts are compatible with most mil-spec AR-15 lower receivers so they drop into the vast majority of builds without modification. Because detents and springs are easy to lose during a build or cleaning session having genuine mil-spec replacements on hand keeps a project moving without a parts-store trip. This is exactly the kind of small inexpensive part that stops a build in its tracks when it goes missing. Packaged as a ten-count set this kit gives builders gunsmiths and AR-15 owners enough spares to outfit multiple builds or keep a stock of replacements for years of maintenance. Whether finishing up a budget AR-15 build or restocking a bench of spare parts this detent and spring combination is an inexpensive way to avoid downtime. TacFire s focus on mil-spec compatibility means these parts fit standard takedown and pivot pin locations without special fitting. For any AR-15 owner who wants to be prepared for a worn or lost detent this ten-pack is cheap insurance. TacFire Takedown/Pivot Pin Detent and Spring Specifications Manufacturer: TacFire Model: Takedown/Pivot Pin Detent and Spring Type: Takedown Pin Detent and Spring Set Compatible Hosts: Mil-Spec AR-15 Lower Receivers Count: 10-Count Available At: GrabAGun