Add internal weight to you MDT ACC Chassis. These weights mount on the inside channel of the MDT ACC chassis forend. With the maximum forend capacity of 5 weights, they add 2.6lb to your ACC chassis system. The interior forend weights can be added and removed without removing your barreled action, simply remove the forend cap, slide them into the desired location under the barrel, and screw them in place from the bottom. Underside clearance slot to allow mounting of M-Lok accessories to ACC chassis forend even with weights installedSide clearance slots to allow mounting of M-Lok accessories to ACC chassis forend even with weights installed3 sets of mounting holes to allow the weight to be shifted inside the barrel channel at 20mm () increments for tuning the rifles balance point. This product has been designed specifically to fit interior barrel channel of the ACC chassis system, and is not compatible with any of our other chassis systems. Four #10-24 x Flat Head Cap Screws per weight for fastening to the chassis. Weight: 0.52 lbs / weight (including screws), 2.56 lbs total.Material: Case-hardened Steel