Frequently Asked Questions - As ripped right off the facebook D.D.O.G. page
On the regulator
On the Detents

Orange Detent - Top Red Detent - Bottom (Note 2mm hole)
On the Barrel Carrier

Barrel Carrier shown above - When you over tighten the barrel carrier, not only do you mangle the carrier, but you also tend to warp the barrel carrier, which makes it nearly impossible to screw in your barrel.
On the Box Rotor Bolt O-Rings
On Mags
Rap4 20 Round Springs - Canadian Store Link
Rap4 20 Round Springs - American Store Link