Just removed the carry handle on my Stag M4 in favour of an Aimpoint PRO. Now looking for rear BUIS - something available and not wanting to wait forever or never to get it. Looking at ARMS 40 or 40-L. Also wondering if the Magpul is decent enough (the plastic construction is a concern...)
Can anyone provide any advice on choosing the right BUIS?
Can anyone provide any advice on choosing the right BUIS?


















































