The ranger plates are a baseplate upgrade for the Magpul PMAG magazines, these plates are for the Gen 2 MOE PMAGs and SA80 compatible EMAG magaazines.
Getting your fingers into the loop allows easy gripping of magazines when whipping them out from pouches, holders or loops.
Plus, made from a slightly rubbery flexible material they protect mag and rifle when resting your rifle on the magazine.
Once you have them, you'll wonder how you did without.
Please note: these are now only available in black, FDE has been discontinued.