I think it's a little bit bigger. I know looking at the flash hider it's definitely bigger than the standard 5.56 KAC style. But the hop up is the same, which makes me think that a regular m4 barrel would technically still fit the receiver, though it would look a little funny

perfect yeah i want to make an OBR style rifle so i just need to put a new barrel in the receiver, but now its just the taking it apart and just seeing for myself lol, but this winter ill be having lots of fun with it and Ron form venture will also love me to! lol

Oh God I have a problem

http://i.imgur.com/lrBKiua.jpg

Switch the optic, pistol grip and foregrip from the middle to the bottom and get a couple triple taps and you'll be fine.

https://fbcdn-sphotos-h-a.akamaihd.n...26082760_n.jpg

Finally finished...

The angle of that photo makes it looks so much longer than it actually is :P

You know, with those angled sights. Wouldn't your hopup throw your BB off to the left when aiming down them?

They are for intimate encounters.

This.

In all honesty it does have a pretty decent curve to it, but the ranges that I will be using them at, it won't matter too much. I can also kind of peek off to the side of the rifle without having to angle it too much.

Needs more back-up sights. Where'd you get the scope?

Honestly though, your secondary front sight should be further down the bore...FOR TEH REALZ.

Scope is http://www.ventureairsoft.ca/item.ph...cdb0635f05659a

And yeah... I have since moved it down as far as it can go (right behind the side rail cover)

Here is an update for my SR25.
External:
-Pretty dam sexy G&G GR25
-Vertical short grip
-Leupol 3.5-10 X 50mm scope
-Madbull sling attachment
-Bipod
-Custom camo paint-job

Internal:
-11.1V LIPO battery
-Complete trigger set low resistance
-Silver wire low resistance
-MOSFET
-SHS special SR25 high torque gear
-Madbull half teeth, 7 metal teeth
-Ultimate Modify aluminium bearing piston head
-Madbull spring M110
-R-hop with Mnub
-650mm 6.01 JBU Barrel

I'll update the upgrade when I'll remember all it have inside.