The M&P Upper parts kit has all the parts you need to finish a stripped upper. This kit includes important parts like a forward assist-assembled, spring and roll pin; ejection port cover, spring and pin; and a hinge pin clip. Includes: Forward Assist - Assembled Forward Assist Spring Forward Assist Roll Pin Ejection Port Cover Ejection Port Spring Ejection Port Pin Hinge Pin Clip Ejection Port Cover Ejection Port Spring Ejection Port Pin Hinge Pin Clip