Originally Posted by 5ozofpain
Just picked this up at walmart for $30. It is an awesome gun but the efficiency is meh. Is there any way I can mod the 12 gram chamber to take an HPA tank?
Permanently, or reversible? I haven't seen that mod done to that particular gun yet, but I've seen it on similar designs.
Running an on-gun bottom line tank would be very, very difficult, so we'll stick with a remote setup. Keeps that fun pistol form.
It wouldn't be all that hard to remove the 12 gram piercing pin on the bottom of the valve and drill out and re-tap the hole 1/8 NPT for a standard hose. A short length of braided line to a quick disconnect below the grip and you'd be all set to run a remote.
Another option might be to cut back the body a bit behind the valve so you can access the back of the valve. Drill and tap a 1/8 NPT hole and mount a HPA fill nipple there. Stick an empty 12 gram in the grip and attach a remote hose. The check valve in the fill nipple will let the air pressure in the remote enter the gun, but if you want to run 12 grams again it will keep the valve pressure from leaking out.
Also, is there any cool mods anyone has done to this?
I've seen some modified barrels, stock class feeds, and some valve tweaking. Haven't done anything to my personal ER2 yet, got a few other projects ahead of it.