The Timber Creek Lower Parts Kit comprises a TC Ambidextrous Safety Selector, TC AR Takedown Pins, TC Magazine Release Button and Mil-spec Bolt Catch, springs and pins for a comprehensive build, making it an ideal foundation for any MSR project, precision CNC Machined from aircraft-grade billet aluminum and offered in 10 color options, it comes with all necessary mounting hardware, but caution is advised to conduct a function check post-installation.