Ruger AR Upper Parts Kit Features The Ruger AR Upper Parts Kit bundles the small components that keep an AR-15 pattern upper receiver functioning correctly into a single kit. It includes the forward assist assembly forward assist retaining pin and spring which help seat the bolt fully when it fails to lock up on its own. The ejection port cover hinge pin retaining clip and spring are also included protecting the action from dust and debris when the bolt is closed. Finished in a durable phosphate coating and made in the USA these parts are built to the same standard of rugged reliability found on factory Ruger AR-pattern rifles. Having a complete parts kit on hand makes routine maintenance or a mid-project build far simpler than hunting down individual small parts. While these components are intended for AR-15 pattern firearms Ruger notes that fit can vary across the wide range of AR-15 builds on the market today so installation by a qualified gunsmith is recommended for maximum safety and performance. This kit is a practical addition for any armorer s bench or AR owner s spare parts drawer keeping a rifle ready to return to service quickly. Ruger AR Upper Parts Kit Specifications Manufacturer: Ruger Model: AR Upper Parts Kit Type: Upper Parts Kit Compatible Hosts: AR-15 Material: Phosphate Includes: Forward Assist Assembly Retaining Pin Spring Ejection Port Cover Hinge Pin Retaining Clip Spring Available At: GrabAGun