Colt 601 Build

[Madcap]

They are the same as the AR10, those roll pins go in and the end slips off. One side would do perhaps, then when cleaned you tap them back from outside. Make sure they're flush before using them.

(Sorry, not familiar with the AR10.) The role pin is accessed only on one side. If the pin is tapped in - clear of the piston and piston is removed I assume the pin is then free to fall out? After disassembly the pin is re-inserted and tapped back in?