Was thinking of this stuff: http://www.ebay.co.uk/itm/CLEAR-POLYCARBONATE-LEXAN-MAKROLON-SHEET-UNBREAKABLE-MARLON-PALRAM-PANEL-/360813914102?pt=LH_DefaultDomain_3&var=&hash=item54022f67f6
Awesome, after Christmas I'll have a go at dremel'ing out the mesh from my Eotech flashhider and replacing it with some of that stuff. I hate looking through mesh..