DO NOT ORDER THIS PART UNLESS YOU ALREADY HAVE ONE OF OUR FRAME MOUNTED LOWERS.
The Underworld Arms Staccato Basilisk Upper is intended for customers who already own one of our frame mounted compensators and want to swap to this new style upper. This compensator upper features two large top ports and four smaller angled side ports.
Works great. Better than I thought. It makes my fairly soft staccato p shoot extremely soft and flat. I dig it and got a get one for my Mac 9 and prodigy.
