RISE Armament’s AR-15 Lower Parts Kit is a must have for anyone building a custom AR platform, or who want to optimize an existing AR. The majority of the parts in this kit are made from industry-standard 8620 steel – a full-up alloy of nickel, chromium, molybdenum, with 0.2 percent carbon. This gives these parts incredible strength and durability for a lifetime of reliable service. The parts are also given a black phosphate finish, which deposits an inert layer on top of the steel to prevent the corrosion reaction from reaching the steel.

This Kit Contains the Following:

• Takedown/Pivot Pin Detents (2)
• Bolt Catch Spring (1)
• Safety Detent Pin (1)
• Bolt Catch Plunger (1)
• Bolt Catch Roll Pin (1)
• Buffer Retention Pin (1)
• Trigger Pins, 5.56 (2)
• Safety Detent Spring (1)
• Spring for Buffer Retainer, 5.56 (1)
• Springs for Takedown/Pivot Detents, 5.56 (2)
• Spring for Mag Catch (1)
• Bolt Catch (1)
• Safety Selector, 5.56 (1)
• Magazine Catch Button, 5.56 (1)
• Magazine Catch, 5.56 (1)
• Pin for Receiver Pivot, 5.56 (1)
• Pin for Receiver Takedown, 5.56 (1)