BudsGunShop.com - KAK Stabilizer?

Should fit without the cover on the tube of course, check this link here: https://bit.ly/2DSwKqh it shows the buffer assembly with the Kak blade. Good luck!

In its present configuration, it would not fit. If, as in most cases, the 'end cap' is made of a hardened plastic-like 'foam', then that can be easily removed, and the buffer tube should then work with the KAK. The end cap can be removed with nothing more than a knife of a pair of good shears.

Garland, no sir it will not due to the end cap design which the diameter is too large for the KAK Blade.