if my memory serves me right the WE AR platforms guns can use the following real steel parts without any additional modifications:
Buffer tube
Selector switch
Grip
Magpul ASAP sling loop and other similar things
RIS (?)
Bolt catch
Mag catch
Buffer tube spring and the buffer (not sure what it's called sorry)
Upper receiver
Charging handle
Just want to see if I am missing from my list. Any input is greatly appriciated. Im looking to upgrade my T91 with some real steel M4 parts
