Tight tolerances as always. Thumbs screws more than adequate but appreciate having the set screws included.

As always machining and attention to detail is meticulous.

Everything went fine, beautiful product

Brilliant

Serves its purpose but its poorly machined and the knobs arrived chipped.

A great option to add weight with the ability to remove quickly. I use when shooting steel at distance, the reduced gun movement allows me to follow my shot to the target. I mount behind my bipod and also attach appropriately sized magnetics to the bottom to add extra weight for precision shooting. Additionally, the unit is stackable if you really want to gain weight fast.

Great addition so far. I e only used it on 22LR chassis since I received it but it worked great. I was able to put more weight out front of the ACC chassis on a CZ 24in. barrel and improve the balance point as I hoped it would.
The weight moves on and off easily and up and down the rail as needed.
Great buy!

Beautiful machining and finish as always from MDT. Problem is the design: it MUST slide on from the front of the ARCA rail, not simply clamp on from the side. Can’t use it if you have anything else on your rail, like a sling swivel or end-stop screws on the front of the rail. Also, must remove any other ARCA accessory, like a bipod, first, then slide on the weight, then re-attach your ARCA accessory(ies). It’s a PITA.