Rocket Airsoft Steel Cylinder Head for VSR-10 Series Bolt Action Sniper Rifles

"This is a great quality upgrade for your vsr. The tapered nozzle with the o ring makes a better seal and lines the nozzle with the hop chamber better if the outer barrel isn't dead straight.
Beware that it might not fit a stock cylinder. For my jg bar 10, I had to cut the channel, that holds the inner o-ring, deeper to make it fit a stock bolt cylinder. On some other bolt cylinders, there is a space between the end of the bolt to the start of the threads which this is meant for.
Pros:
-inexpensive upgrade
-well made with very nice finish
-extra o-ring on nozzle

Cons:
-needed modifications for a stock cylinder