Keep a few backup parts on hand or get ready for your next build with the RISE Armament® AR-15 Lower Parts Kit. This lower parts kit comes with all the pieces you need to build your lower receiver minus the trigger and trigger guard. Most of the mil-spec parts in this kit feature 8620 steel construction to create incredibly tough and strong parts, perfect for your AR-15’s lower. Further, the Safety Detent Pin and the Takedown/Pivot Pin Detents are made with yellow zinc for added durability. What’s more, many of the parts feature a black phosphate finish for superior corrosion-resistance and protection from extended shooting so you can bet the most out of your rifle. Compatible with mil-spec AR-15s. Even better, this lower parts kit is backed by a lifetime warranty from Rise Armament so you can have added peace of mind during your next build. This lower parts kit includes 2 takedown/pivot pin detents, 1 bolt catch spring, 1 safety detent pin, 1 bolt catch plunger, 1 bolt catch roll pin, 1 buffer retention pin, 2 trigger pins 5.56x45mm, 1 safety detent spring, 1 spring for buffer retainer 5.56x45mm, 2 springs for takedown/pivot detents 5.56x45mm, 1 spring for mag catch, 1 bolt catch, 1 safety selector 5.56x45mm, 1 magazine catch button 5.56x45mm, 1 magazine catch 5.56x45mm, 1 pin for receiver pivot 5.56x45mm, 1 pin for receiver takedown 5.56x45mm. Does NOT include a trigger guard. Made in USA.