LANTAC M-SPEC UPK. AR15 Upper Parts Kit Black. Manufactured to the highest quality standards using correct materials heat treatments and finishes to comply with up to date military specifications. Kit includes the following: Ejection Port Cover Ejection Port Cover Rod Ejection Port Cover Spring Forward Assist Assembly Forward Assist Spring and Forward Assist Roll Pin. Specifications for LANTAC M-SPEC UPK. AR15 Upper Parts Kit: Manufacturer: LANTAC Color: Black Gun Model: AR-15 Gun Make: AR Platform Gun Type: Rifle Features of LANTAC M-SPEC UPK. AR15 Upper Parts Kit Lifetime Warranty Package Contents: LANTAC M-SPEC UPK. AR15 Upper Parts Kit What firearm models does the manufacturer say LANTAC M-SPEC UPK. AR15 Upper Parts Kit is compatible with? The manufacturer suggests that LANTAC M-SPEC UPK. AR15 Upper Parts Kit is compatible with AR-15LANTAC 01-PKIT-UP: M-SPEC UPK. AR15 Upper Parts Kit Black