Quote Originally Posted by Aragorn View Post
This makes me wonder if a piston gun should be quieter than a DI suppressed.
Maybe, since a lot of the gas is going forward and might be quieter to the shooter's ear, but you still have the gas coming out of the throat of the chamber, so I'm not sure if it would be measurable to the human ear. You also have the additional mechanical noise of the op-rod interfacing with the piston and then the carrier.

Quote Originally Posted by alamo5000 View Post

It basically changes the dynamics to be 70% bolt gun in terms of gas.

No, it doesn't. Quit blindly folllowing GA's PR stuff. It's the same amount of gas. The laws of physics say so. It's just going to a different place.

Something else to consider is a lot of "gas in the face" is coming from the barrel/chamber, not through the gas tube, which can be helped by delaying the bolt from unlocking, but the gas is still there and it has to go somewhere eventually.

If this or any other BCG works for you, great, but at the end of the day, the "cheapest" solution is to have a properly gassed rifle from the beginning.