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

"Barrel is the RA tech barrel not exactly sure about the inner radius. The hop up bucking, housing, tensioner, look extremely similar to the stock KWA, and im pretty sure they are b/c I also bought a maple leaf 75 bucking hop up set. The shell i'm not 100% sure about. the cuts were definitely different but it could just be a tolerance thing.

"Not a complete unit as advertised, it doesn't include the brass fitting to hold everything together. but still a great barrel!

"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.