I recently installed this in my JG Bar 10 and I couldn't be any happier. The stock bar 10 cylinder is made of a very cheap pot metal and scratches easily making the bolt pull very rough. After I installed the Masamune Cylinder Kit I immediately noticed a huge difference in bolt smoothness and consistency. The build quality is also leaps and bounds over that of the stock cylinder in my Bar 10. The included cylinder head also improved my air compression resulting in more fps.
Teflon coated for durability and smoothness.
Very high build quality.
Very little flashing from production.
Included cylinder head increases air compression.
The black bolt looks much better then the stock silver color.
Nothing that comes to mind at the moment.
Rating: [5 of 5 Stars!]