I noticed while reviewing BCMs multiple options for rail systems on their uppers for sale there is a fairly wide selection. I am familiar with the VIS, SWS rails and I was issued an M4 some years back.
Are there any threads and/or comparisons of the various rail systems regarding weight, strength, and overall desirability? I did a quick search without finding what I had hoped too. Something lighter than the aforementioned but retaining a reasonable amount of strength for taking a header out of vehicle onto concrete seems to make sense.
Thanks for your responses.