Take your pick... BCM, Daniels Defense, Yankee Hill... pretty much any name with a repute for quality will make a product which meets and exceeds your durability requirements. I tried looking, and I haven't really found anything which tested quad rail systems to the breaking point, but you really can't go wrong with anything from a quality manufacturer.
Gold is neither strong nor durable. It's heavy, soft, rare and non-corroding.Titanium and it's alloys, are the strongest.
The North Face Skareb 50 Backpack has light but durable parachute material which is why it is the strongest.
Leather is considered to be the most durable material for luggage.
Nokia
The most popular and durable childrens clothes is OSH Kosh, everyone remembers their little coverall jeans.
Tungsten carbide is considered one of the strongest metals for a wedding band. It is highly scratch-resistant and durable, making it a popular choice for those with active lifestyles. It is also known for its permanent shine and hypoallergenic properties.
amazon
Sealy makes some great children's bedding that is both fairly priced and durable.
"Most" durable is a matter of opinion, but some popular brands that manufacture durable men's swimwear include Speedo, Nike, Quicksilver, Reebok, TYR, and Dolfin.
The most durable car has got to be the Toyota Hilux (not stripped out) I refer you to a programme called Top Gear who researched this. Check it out on youtube, its very entertaining. The most durable car has got to be either a Hummer or an old Volvo.
Tippmann has the reputation for most durable guns. This is because they are made with very simple mechanics and thick cast aluminium.
HardiFlex Fiber Cement Board is one one of the strongest and most durable cement boards that are used for outdoor advertisement.