Every time I rack back the charging handle to load a shell or fire a round the little retainer cap and spring that is located in front of the buffer tube spring pops out?
I have checked to make sure everything is lined up and it looks fine.
Anyone experience this before? what could be the problem?
The upper is lined up perfect and everything looks great when I lock the upper to the lower then one pull on the charging handle and "boing" the stupid retainer cap and spring pops out!
I see the groove on the upper and it is lined up, WTF?
T.I.A. and please excuse a slow update as I need to leave for work.