FX Impact M4 bottle

I dont like the idea of all that weight and leverage being put on the bottle adapter. A 580cc bottle is already a lot of air, but I would consider a dual 480cc or dual 580cc for a bench rifle. But if you are doing a lot of bench shooting a tethered tank is a better choice imo.

Twin bottle platforms appeal to some but judging from Krale pricing discounts trying to move AGT Kings and Princes, not to most. WM

I had a 700cc bottle on my M3. I got 75 shots on a fill. I had it shooting the H&N 40gr heavy slugs at 980fps.
It added 1.5 lbs to the rifle.

I dont like off balance weight guns, I put the money into an scba instead of a big bottle. I could get more shots with a 4500 psi larger bottle, but the factory 580 is more than sufficient for my walk around needs at 75 fpe. Sooo for the bench I have a regulated manifold setup and some large cylinders.