The Adler yes. One of my mates is a gunsmith and was increasing the magazine length too.
They are now 5 rounds I believe, he was making them 8. The law is grandfathered or some such dumb term. So, if you have an 8 round you can keep it but when/if it is transacted to another it has to be reverted. And yet, I have a sniper rifle that I am accurate on at up to a mile with a 20 round magazine as legal, semi-auto handguns and this 515 which a 25 round magazine is legal in.