The CN5F is an extended castle nut designed specifically for the Vltor A5 system, adding 0.1" in length for better compatibility and coverage on receiver extensions.
It features improved staking notches that are 30 degrees, 25% longer and deeper than TDP spec, with four equally spaced notches for more staking options.
CN5F is constructed from 4140 PH steel, available in various colors including burnt bronze, and is manufactured in the USA by Forward Controls Design LLC.