I have been running an upgraded JG vsr 10 but for 2-3 years I was struggling to find a good accuracy. It was a very high powered vsr 10 upgrades and nothing worked. Then I needed a new trigger unit which was more expensive than the CM.702B do I bought the complete rifle. It turned out to be the best buy because the rifle is put together so much better then JG. everything is tight and no wobbling and that is very important for a high power rifle. Everytime I was shooting with the JG the vibration inside moved the inner barrel or any other parts which made the next shot very unreliable. The tight fittings in the cyma eliminated that issue and now I am much more accurate and reliable. I can actually zero my scope for a very small margin and I am almost sure I can repeat every shot. Although the cyma is great, it will definitely need some upgrades which can be done very easily with the cyma upgrades or turn it into an HPA like I did.