M16 interchangability

[jmoore]

A pertinent thread stolen from M4carbine.net:

Bolt failures - M4Carbine.net Forums

Be sure to read most all of it, and note that several highly experienced folk get involved. Note also that the "eve-eel" headspace bugaboo never comes up. Round count AND weapon configuration are both impartant factors.

If you shoot less than a thousand rounds a year out of a particular weapon, don't waste your time worrying about all this- as long as you have good gear to start with! "Commercial grade" parts? No telling how long you have before things go south.

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