New Toy for PRS Boys — MPA Matrix Chassis

MasterPiece Arms (MPA) has a new chassis system — the “MPA Matrix”. Derived from the MPA BA Chassis, the MPA Matrix Chassis offers a “multitude of configurations in grips, thumb rests, and trigger finger supports”. MPA claims the grip and hand area has over 100 different variations. The MPA Matrix has a fore-end two inches longer than the standard BA or BA Competition Chassis. Overall, the Matrix is fairly heavy, at 6.4 pounds, and pretty expensive, with a $1250-$1450 MSRP (depending on options). By contrast the MPA BA Hybrid Chassis costs $925.00 and weighs 3.5 pounds (without recoil pad).

CLICK Image for large MPA Matrix Photo:

There are significant design differences between the MPA Matrix and MPA BA Hybrid (below). The Matrix, at 6.4 pounds, is also much heavier than the 3.5-lb BA Hybrid. Given that many PRS/NRL competitors favor heavier rifles for greater stability (and less felt recoil), the Matrix’s extra mass is probably a good thing.

The MPA Matrix features five different grip options (3 swept and 2 vertical), three different thumb-rest designs and four different trigger finger supports. That’s great for shooters who like to keep their thumb forward on the bolt side of the action. However, looking at the chassis, we’re really not sure we like the way the Matrix encircles the grip area. You’ve got hard metal behind the grip. The Matrix appears set up for resting the thumb of the trigger hand alongside the action. That can work for sure, but we think some shooters will prefer a more conventional vertical grip you can wrap your thumb around. A conventional grip will also have recoil cushioning for the web of the hand. See the BA Hybrid chassis for comparison. This Matrix is really VERY different in the grip area. But if you don’t like the Matrix, there are certainly other stock options available.

The new Matrix Chassis is designed for Remington Short Actions and Rem clones. The Matrix does offer good adjustability — the buttstock has an adjustable cheek riser and length of pull adjusts from 13.5 to 14.75 inches. Plus, the recoil pad adjusts for height and cant. You can get either an adjustable rear monopod or a bag-rider configuration. As you’d expect, the MPA Matrix has M-LOK slots along the fore-end sides and barricade stop holes along the bottom.

What was the concept behind the Matrix chassis? MPA’s President, Phil Cashin, states: “One of the things that we have seen in precision rifle shooting over the past couple of years is how many different methods a shooter used to engage a stock or chassis. Due to variations in hand size, finger thickness and length, as well as shooter preference on how they want to engage the chassis or stock, we’ve seen a lot of inconsistencies among the shooters in how they engage the rifle and where they position the pad of the trigger finger with the shoe of the trigger. This inspired us to create a system that would provide a more custom fit procedure for our customers by creating a chassis with more customized configurations.”

The MPA Matrix Chassis (MSRP $1250-$1450) is available in eight Cerakote colors: Graphite Black, Flat Dark Earth, Burnt Bronze, Tungsten, Gunmetal, Sniper Green, NRA Blue, and USMC Red. Custom H Series Cerakote colors are an additional $135, while camo patterns are $450 extra.