You mean the A5 parts are oos or just the spring? You can use any rifle length spring with it.
I'll have to take a much closer look at that. You have to have the special Vltor tube for that as well... right?
Is it worth waiting for? Do Magpul stocks fit their tube?
Vltor or other tube made to length. I think BCM makes one.
You have to use their buffer.
Rifle length springs work. I use a Sprinco green spring.
They'll fit, but won't fully close because the tube is longer. They'll stop at one notch out