I just fielded my HK416 yesterday after Matt and Dave swapped out the spring at FR Indoors. (Thanks alot guys)
I chrony'd 408 fps with .20's, 350-380 fps with .25's on the stock spring.
After putting in what is believed to be a m100 spring, it chrony'd 340-350 fps with .20's and 310-320 fps with .25's.
It fired 12 bps through the crony.
I had alot of fun with my 416. Feels awesome, sounds nice. good grouping after the hop-up was adjusted.
No problems feeding, except SOMETIMES the first round would double.
I noticed that I had to aim a little high using the stock iron sights, but it shot nice and straight.
The only negatives I have to say is the pistol grip feels a little cheap, my front RIS wobbled a bit (I fixed this by putting a small amount of tape on the tab that comes from the upper receiver RIS and into the front RIS ), this put a VERY small downward angle on the RIS, very small but now the gun is very solid.
This is my first AEG so I can't offer advanced information, just what I've experienced.
All in all, this AEG is quite awesome, no complaints at all. I'll definitely buy another JG.
Thanks for reading
To save the trouble of Ancorp reading it in every post: Inokatsu