Okay, assuming this is the unit your looking at
Then I'd say no. When I took mine apart the "Fixed" hop up is actually a rubber nub IN the barrel itself.
If you want to put a hop-up into your APSII SV with the ability to use any AEG barrel THIS is the product for you.
PDI Adjustable Hop up for the APSII. Although, my advice from recently installing one, that little spring, throw it out. Drill a hole in the top of the barrel and thread it for a small screw to hold down the two levers above it. MUCH easier and you won't run into as many problems as I did before I got fed up with it.
I know UNCompany and WGC are out of stock on the PDI Hop up, but Red wolf has em in stock.
Guess I should have had my APSII SV upgrades here and not in Airsoft Media, anyway, linkie to what I've done with my APS II.
http://www.airsoftcanada.com/showthread.php?t=37599
I was able to install a 550 6.03 inner barrel using this hop up.
Oh, I also made the assumption this is a Maruzen APSII SV.
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