Barrel chop.

[BPTactical]

Thanks brutal I'll give him a call and see what he thinks.

That's been the general consensus from what I've heard Mark, doable but risky. I've found a place in Oregon that has 100's of jobs done with very few negative outcomes, I'd just like to support the local guys.

The problem is that the barrel is essentially pinned so I have to cut it anyway to install a new one. It's not impossible to find new barrels but a little less cost effective. It's not too unique, a PS90.

PS90 barrels are a PITA. The "Flash hider" is actually the barrel nut, it is a long shroud that runs the full length of the barrel to the receiver. It is then blind pinned and welded.
They suck.
I have done two and in all honesty I won't be bummed if I never see another one.
Pay the price for the shorter factory barrel.
Now as far as cutting a chrome lined barrel, if it is a quality barrel(and the FN is) if the barrel is cut correctly leaving enough extra length to gradually dress the barrel back I have seen no ill effects. Slow and smooth.