is colt's castle nut special?
my armorer's tool comes with a castle-nut slot (that also works for DD's lite/RIS barrel nuts) and a spanner.. i think the spanner is actually more useful anyway, though- more torque and easier to keep on the nut. can kind of chew the nut up a little, but i always replace the nut when swapping REs/endplates anyway. install only needs like 15ftlbs of torque, so no chewing there.
Last edited by bkb0000; 08-27-09 at 17:02