When I first started researching the M4 a few years back, I honestly thought the collapsable stock looked odd.
Last Feb, I came across a M1014 US flag model w fixed collapsable stock at Sportsmans warehouse. Once I started seeing the various forum member builds and comments about the middle position being right length of pull in combination w RMR and Scalerworks mount, etc etc, I've slowly been moving in that direction. Finally, I have accumulated the parts and I am all set up to switch out neutered recoil tube w the 3 position.
A shout out to SD for his extensive photo essay tutor