Wiggles - does not have clamping screws - Samson Star-DI and Diamond-DI Carbine Length Drop In Rail System AR-15

I bought this for the m203 compatible rail notches on the first and last rail slots to fit Knights Armament rail covers for a MK18 mod 0 clone build. Although nicely machined and finished, unfortunately the designers cut corners by not clamping the upper and lower halves with screws. As a result the handguard is not tight and wiggles between the delta ring and end cap. In addition the two halves exert unequal pressure on the barrel which pushed the barrel to the left requiring me to adjust my fixed rear sight all the way left to its mechanical limit to achieve zero. (With a drop in quad rail with clamping screws the sight’s mechanical
zero was pretty much dead on for poa/poi). Because this handguard wiggles it turned a 4 moa gun into a 10 moa gun. Not good. So switching back to my prior drop in handguard that clamps down solidly.