Lantac M-SPEC Upper Parts Kit (UPK) for AR15 style rifles. – 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 – Forward Assist Roll Pin – Lifetime Warranty. – Made in the USA.