New: MasterPiece Arms Rapid Adjustment Technology

by
posted on October 23, 2017
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **

MasterPiece Arms (MPA) has introduced a new product line, the MPA Rapid Adjustment Technology (RAT) System. This system enables MPA Chassis users to quickly adjust bipod, tripod and barricade stops on the fly. The RAT system is composed of the Base, Harris Adaptor, Dovetail Adaptor Plate, Picatinny Rail Adaptor and Magnetospeed System.

Coming in at a svelte one pound, the lightweight RAT Base (MSRP $70) can attach a variety of accessories to the 1.5″ Dovetail Cut on the MPA BA Chassis System. A pocket is machined into the bottom that includes holes designed to accept a series of accessories that will attach to the Base, allowing the shooter to utilize the RAT System. It attaches to the RAT Dovetail Adaptor Plate mounted to the MPA Spigot Mount. Additionally, an Atlas Bipod can also mount directly to the RAT Base.

The RAT Dovetail Adaptor Plate (MSRP $30) attaches to the Spigot Mount on the MPA BA Chassis System and allows the shooter to run the RAT System and all the accessories on both the chassis body and the Spigot Mount. It’s also needed to run the Magnetospeed Adaptor on the MPA BA Chassis. Installation consists of simply removing the existing Picatinny rail from the Spigot Mount, and attaching the RAT Dovetail Adaptor Plate.

The RAT Harris Adaptor (MSRP $90) provides an attachment method for the Harris Bipod to the 1.5″ Dovetail Cut on the MPA BA Chassis System, and also the RAT Dovetail Plate (Spigot Mount). It is designed to replace the sling stud attachment plate on a Harris Bipod.

The RAT Picatinny Rail Adaptor (MSRP $90) is designed to provide an attachment method for items that interface with a Picatinny rail. This connects to the 1.5” Dovetail Cut on the MPA BA Chassis System, as well as the RAT Dovetail Plate (Spigot Mount).

The RAT Magnetospeed Adaptor (MSRP $90) is designed to provide an attachment method of a Magnetospeed V2 or V3 to the RAT Dovetail Adaptor Plate (Spigot Mount) on the MPA BA Chassis. Shooters can attach the Magnetospeed to the rifle without contacting the barrel. This eliminates any point of impact shift concerns when the shooter is gathering data on velocity. The system includes the RAT Base, Magnetospeed Adaptor Block, and attachment rod and thumb wheel. A Spigot Mount and RAT Dovetail Adaptor Plate are required to attach to the chassis.

Latest

2025 Usashooting Pistolnationals 1A
2025 Usashooting Pistolnationals 1A

Klemp, Tobar Win Big At 2025 USA Shooting Pistol Nationals

Marcus Klemp and Nathalia Tobar emerged as champions in the men’s and women’s 10m air pistol events at the 2025 USA Shooting National Championships in Anniston, Ala.

Review: Ruger 10/22 Carbon Fiber

Precision meets speed: Ruger’s 10/22 Carbon Fiber raises the bar for rimfire competition, especially Steel Challenge.

Winstead-Severin Outlasts Field To Win 2025 Iron Man Silhouette Championship In Montana

Cathy Winstead-Severin clinches 2025 Iron Man Silhouette Regional Championship in Missoula, Montana, showcasing elite endurance and precision over two grueling days of competition.

A New Generation Rises At Close Of 1970s: 1979 National Matches

New champions emerge as legends endure in a defining year at Camp Perry.

NRA America’s Rifle Challenge Takes Center Stage On Shooting USA

Shooting USA heads to Camp Atterbury for a deep dive into the NRA’s latest action shooting format, designed for both new and seasoned AR-15 competitors.

Springfield Armory 1911 AOS Series Showdown

Springfield Armory’s modern 1911s—TRP AOS, Ronin AOS and Operator AOS—go head-to-head in a 1911 AOS series showdown.

Interests



Get the best of Shooting Sports USA delivered to your inbox.