Magpul

Magpul started with a single rubber loop for pulling magazines out of pouches and turned that into the polymer furniture standard for the AR platform. PMAGs are now the default magazine for most shooters, military included.

The rest of the catalogue is stocks, grips, handguards, sights and slings built to the same brief: lighter than aluminium, cheaper than machined, and hard to break. Very little of it is precious, which is the point.