Masterpiece Arms MPA BA Bolt Action Mount - 34mm 1.125" 0 MOA One-Piece MPA Bamount-34-1125
MasterPiece Arms
The MasterPiece Arms MPA BA Hybrid Chassis in tungsten finish is a precision rifle chassis engineered for shooters who want the accuracy and adjustability of a full-size platform without the extra weight. Built for Remington 700 barreled actions, this aluminum chassis delivers the customization potential serious marksmen demand—whether you're building a long-range hunting rifle, a competition gun, or a precision range rig. At 3.5 lbs, it's nearly 2 lbs lighter than MasterPiece's flagship BA and Comp models, making it an excellent choice when you need to keep overall rifle weight down without compromising features or performance.
The V-Bedding System provides drop-in accuracy right out of the box, but the design also accommodates full action bedding if you want to go that route. The tungsten finish delivers a professional, durable coating while the machined 6061 aluminum construction keeps things light and rigid. You get a complete package: an MPA buttstock with adjustable length of pull (13.50–14.75"), a recoil pad with height and cant adjustment, an adjustable cheek riser, a bag rider, an EVG pistol grip, bipod pic rails, and multiple QD sling attachment points. The Lug Lock System handles lugs from 0.250" to 0.375" thick, and a built-in inclinometer helps you keep the rifle level during setup.
Smart design touches—like the unique pocketing system that reduces weight while maintaining structural integrity and a machined thumb notch for positive control—show that MasterPiece sweated the details. This isn't a chassis that forces compromises. You get genuine adjustability, a modular platform for future upgrades, and real savings in carried weight compared to heavier alternatives.
| Brand | MasterPiece Arms |
| Model | MPA BA Hybrid Chassis |
| Finish | Tungsten |
| Compatible Action | Remington 700 barreled action |
| Material | 6061 Aluminum |
| Weight | 3.5 lbs |
| Adjustable Length of Pull Range | 13.50"–14.75" |
| Lug Lock Thickness Range | 0.250"–0.375" |
| Included Components | MPA Buttstock, Adjustable Cheek Riser, EVG Pistol Grip, Bag Rider, Bipod Pic Rail, Recoil Pad with Height/Cant Adjustment, Lower Picatinny Rail, Inclinometer, V-Bedding System |
This chassis is designed for Remington 700 barreled actions. It uses a Lug Lock System that accommodates lugs from 0.250" to 0.375" thick.
Yes. The V-Bedding System is engineered for drop-in accuracy, though the chassis design also allows you to bed the action fully if you prefer a custom fit for your specific action.
You get the tungsten-finished aluminum chassis with integrated features, plus the MPA buttstock with adjustable cheek riser and length of pull, an EVG pistol grip, a bag rider, recoil pad (adjustable for height and cant), bipod pic rail, lower picatinny rail, multiple QD sling attachment points, and the V-Bedding System.
At 3.5 lbs, the BA Hybrid is nearly 2 lbs lighter than the flagship BA and Comp Chassis models, making it ideal when you want to reduce overall rifle weight without losing adjustability or features.