These weights, produced by Grayopscnc, are designed specifically for the Matrix Pro Chassis.
These are machined from Steel and Black Nitrided. This includes a complete set of weights for the Matrix Pro. These will not fit any other chassis produced by MPA.
 
Machined Steel
Black Nitride finish for corrosion/rust protection
Includes 8 total weights (7 Regular/1 Contoured to accept Spigot mount)
Includes Stainless Steel hardware
Kit adds 32 ounces to the fore-end including the fasteners.
6 threaded holes per weight to allow location flexibility
Installs without removing barreled action from chassis