The upper parts kit includes everything you need to install the dust cover and forward assist onto a left-handed upper receiver.
- Ejection port cover
- Ejection port cover roll pin
- Ejection port cover spring
- Forward Assist assembly
- Forward Assist roll pin
- Forward Assist spring
Q: Does Stag Arms have instructions or a video on how to install the kit?
A: We strongly recommend having a gunsmith install the upper parts kit to prevent damage during installation.
It says its blem but I searched for a while couldn't find it and it fit perfectly on my lower
They fit in the receiver.