gel blaster mods for beginners

how to mod gel blasters for beginners.
what mods you should do first before spending big money.
also worth noting that i did no cover hop up in this video... but its probably one of the first things you should do.
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buy SCAR V2: http://s.click.aliexpress.com/e/mN9RvM8
spring: https://s.click.aliexpress.com/e/_Dd9...
o ring: https://ebay.us/Prbe7x

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