Hey Hopup! What’s poppin! Today I’m selling or trading my Magpul MK18 ERG build It’s a super unique build because it offers a recoil system in the buffer tube for realism. It also works like a ptw with the erg mags. Internals: Prommy bucking 6.02 tbb Externals: Magpul body Magpul stock DD MK18 rail Looking for helmet stuff Night vision Snipers