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RA Tech Complete Hopup and 370mm Inner Barrel Set for KWA M4 Airsoft GBB Rifle

1 Customer Review

by John C. on 08/20/2015
"I used this kit to upgrade my mega arms lm4 barrow it really helps with accuracy however the hop up unit is not good that's why I gave it 4 stars I did heavy modification to the hop up to turn it in to a grub screw hop up and it's now a tack driver. Check out LM4 custom upgrades on YouTube it takes some work but let me tell you it's worth it.