KAK Industry AR-15 Frame Features The KAK Industry AR-15 Frame completion kit supplies every small part a stripped upper receiver needs to function starting with the complete forward assist button and its pawl or claw which engages the bolt carrier to seat a round when needed. The forward assist helical spring and roll pin secure that assembly so it returns and locks properly after every press. The ejection port cover along with its rod C-clip and spring keeps the action protected from dust and debris until a round is chambered and the bolt cycles. Each of these parts is a direct factory-style fit for a standard AR-15 upper receiver. Every part in the kit wears a Phosphate finish a corrosion-resistant treatment that holds up to range use cleaning solvents and long-term storage better than bare steel. KAK Industry was founded in 2011 to fill a gap in the market for quality American-made AR components sold at affordable sustainable prices and this kit reflects that mission in a simple essential build component. Builders assembling a complete upper from a stripped receiver need these parts before the gun can cycle at all making this kit a practical first purchase. It is a straightforward no-frills way to complete an AR-15 build with reliable corrosion-resistant hardware. KAK Industry AR-15 Frame Specifications Manufacturer: KAK Industry Model: AR-15 Frame Compatible Hosts: AR-15 Color: Black Finish: Phosphate Material: Steel Weight: 0.098 lbs Caliber: Multi-Cal Available At: GrabAGun