If the E-series is anything like a standard SR15 Combat Master, you need the URX tool to remove that. The "jamming" is basically you hitting the jam nuts together. I would probably also discontinue whatever you're doing if metal shaving are "falling out"
But even before that, you'll have to remove the flash-hider, washer, 4 screws securing the 2 halves of the rail (might not be applicable as the E-series uses a 1-piece rail), gas block and tube.
Last edited by Stealth; October 15th, 2013 at 11:25..
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