BeastPro Upgrade: Oversized Plunger Cup BIG CHEAP increase in distance/power M4, SCAR, HK 22.8mm

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  • Regular price $4.99

We have done all the hard work and spent a lot of money in research for you and these parts that I am now selling are the best and will be the right type of upgrade that will give you the best benefits. 

# Oversized plunger cup increase the distance a lot. 
# 22.8mm oversized cup 

#Smoother then O'ring type 

!! Important !! You must lubricate very well or you will strip gears. 

Wave GEARbox Terminator M4 , SCAR ETC

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