Please look at these Hand guard markings

[rokwell]

What I see are that two distinct shape patterns are being used!!! It's clear to see! Sorry to keep editing but this is hard to sort out. I think I have it now.....Can you look at more handguards to compare? One pattern as seen for the 4 rivet RMC and 2 rivet QRMC, and then another pattern for the 4 rivet QRMC and 2 rivet RMC. Look carefully, you will see the ends (front and back) are very similiar in shape for the 4/QRMC and 2/RMC combo, and then the same for the taper angle in the front which is longer. (looking at the top view pictures). Same similarities for the 4/QRMC 2/RMC combo.....front ends taper radius is more, sight groove shallower, while the other combo has less taper radius and deeper sight groove up front. Then we have the rear of the guards - more pronounced 'knock off' of rear edge radius on the one combo than the other. Looks like two different 'models' being macined from. Does the same hold true for the milling marks on the underside of the handguard, center channel? Same type of milling marks for the 4 rivet RMC and 2 rivet QRMC combo, and then the same type of milling marks for the 4/QRMC and 2/RMC combo? Same for each combo, but different amongst combos? Does anyone else see this too?