Very pleased. This gun was purchased with the intent to upgrade to 2.32 joules. (.20g bbs = 500fps) with a post upgrade performance spec of: 400fps with .30g bbs.
My local tech and I planned on upgrading the barrel (length and bore), bucking, hop up, cylinder head, cylinder, if needed, piston, piston head and spring. We end up upgrading all but the hop up (a bit disappointing) and cylinder (not necessary). But had to upgraded the motor and bearings as well to cope with the heavier spring and compression of the better piston head and barrel length.
IT FIRES SO SMOOTH!!!!!
The upgrades worked out well. We achieved about approximately 2.15joules (.20g bbs at ~480fps) and an accuracy increase which has yet to be determined.
I'm hoping for an accuracy of 6" or tighter radius around bullseye, for 2/3rds of the rounds at 100ft. This is compared to stock, which was about 10" to 12" at 100ft. note: 2/3rds radius...accounts for flyers. We are using premium bbs: Elite Force .20 and .25g, Bioval .30g.
I picked this model over a very popular competitor because of the internal upgrade-ability.... I am glad I did.
The externals make for a very aggressive A.E.G.
Overall construction: Great
Out of box performance: As expected and lots of fun.
Internal upgrade compatibility: Very Good
Stock hop up is plastic
Crane stock is a bit loose
Selector switch is sloppy
Rating: [5 of 5 Stars!]