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Echo1 M4 Hop-Ups And Inner Barrels

OptimusPrime

Here's how to install your hop-up unit and inner barrel from Echo1 USA as done by Brian Holt. This includes a video and photos for better understanding... "It is time to either upgrade your hop up unit or inner barrel but you don’t quite know how? Check out this quick 'how to' video and blog to learn and save yourself some time and money for more parts later on!

This is the video from BRIANatECHO1 on how to remove the inner barrel and re install depending on what you need to see and learn. Also the second half of the video is how to assemble the Echo1 M4 hop up unit in case you bought a brand new one and it is all in parts."

Read the rest here.

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