I decided to take my chances with the Airsoft GI brand hoping that their products are as good as their service and reputation. Man what a gamble....IT WORKS!!!!!
With the stock JG BAR 10 configuration, I installed this bad boy and it shoots like a miracle. Even with minimal hop up, I found that the BB's travel at longer distances before showing any signs of dropping. In fact I also found that in low wind conditions, I can compensate for deflection using the accessible hop up adjustment. I just add more hop for targets at longer distances instead of raising the crosshairs above the target for compensation (which is the right way to do it =P )
One thing to keep in mind, this is for the VSR 10 or BAR 10 - straight up versions. This inner barrel length WILL STICK OUT past the outer barrel length of the G SPEC versions. I was already aware of this and I wanted the extra length for the theoretical increase in accuracy and hide the excess using the G SPEC's mock suppressor. However, I had to use a precision lathe and an R size drill (0.339" by spec but measures 0.333" physically) to open up the G SPEC's outer barrel in order to create allowance for this inner barrel's 0.331" outer diameter. I do not recommend attempting this mod with a hand drill. If you did not comprehend the numbers or procedure that I just described, don't bother buying this particular inner barrel and attempt to make the mods for the G SPEC. Purchase the correct length for you G SPEC. Any and all modifications you attempt on your airsoft gun are done at YOUR OWN RISK.
-Miracle straight shots
-High grade, hi polished steel
-Longer than standard GSPEC inner barrel.
-Tweek fun! (if you're into machining and you have access to a decent tooled machine shop with a precision lathe)
-Otherwise a perfect fit! Awesome tolerances (ID and OD) great job with the machine work and packaging for shipping (overkill huge box with lots of stuffing to prevent damage during shipping)
-Too long for GSPEC (a CON if you don't have the right tools to modify)
-Airsoft GI is 1 hour and 40 minutes away from my house =(
Rating: [5 of 5 Stars!]