True Bore ADI/ACI Set-up Tool by Flatline Ops

If you're a fan of the original plastic MFT minimalist stock, you'll love this Aluminum one! It has superb machining— an extreme attention to detail. It has that real premium feel when you hold it. The photos barely do it justice. You have to see it in person to appreciate it. It's got a hefty price tag, but once you hold one in your hands— you'll understand why. Fits perfect on my milspec tube by Aero precision, has virtually "no-play", but very smooth telescoping adjustability. Also, Tactical Works ships fast, and the price is a little better than most other vendors online. Can't go wrong shopping here.