Often over looked part - Ergo Grip AR15/M16 Gappers

This part is great if you are using a standard GI trigger guard for that old school look. Prevents discomfort of lower receiver ears on your finger if you're using a standard A2 or any Magpul grip since those don't have a "duckbill". Only drawback is this makes it impossible to use the "hinge" function of the GI trigger guard for gloved hands. Very easy to install. Just remove pistol grip, slide forward onto to trigger guard, re-install pistol grip. Makes grip very comfortable.