I purchased this inner barrel for my JG m16 A3 and it certainly did not disappoint. My goal was to buy a cheaper, sub-par assault rifle and modify it to compete with top end guns for a fraction of the cost. This barrel plays a very large part in that goal as it adds approximately 30-50 feet of range and significantly tightens the spread. 6.03mm inner diameter means maximum range and accuracy without having to worry so much about jamming your AEG like a 6.01 would. Only other suggestion I would make is, if you are going to spend the money on a nice barrel like this one, you MUST upgrade your hop-up! Unfortunately, my JG uses a two piece hop-up, so I couldn't really replace it with anything much better; but, if you have problems with inconsistent hop-up, the bucking is what has the most to do with that. After upgrading both my barrel, from the stock 509mm 6.09mm brass barrel, to this 650mm 6.03mm steel barrel, and the bucking, from the stock piece of crap, to a "W" bucking, the accurate range has gone from round 120 feet to well over 200 feet with .25 gram bbs.
-Works well with hop-up unite in JG m16 A3
Not really a con, just a warning. If you intend to get this barrel you WILL have to get a mock suppressor as an external barrel extension. On the JG m16 A3, this barrel sticks out approximately 5" out the end of the stock external barrel cover (with the flash-hider off).
Rating: [5 of 5 Stars!]