Any of you guys hear of KM Tactical? They sell a lot of inexpensive parts. I bought some inexpensive handguards from them. A local shop had some for $59, so I figured what the heck. Look exactly like my $270 Noveske NSR's, but a lot less money, and they work very well. Seem to be very rigid and accuracy stays the same:
Can you figure out which one is not a NSR?
They have some very light M-lok rails on sale right now. The op may want to check them out:
KM Tactical M-Lok skinny rail on sale: $39.95