MPA BA Rifle Custom Shop

Product Description

The MPA BA Custom Build system gives the shooter several options to help design an ultra precision long range Rifle. Just pick your action, barrel, trigger, color and specify your caliber and chamber.

You can also add our mount, an optic and choose to have the rifle “range” ready, including barrel brake in, zero and load development.

We can provide optics from Bushnell, Leupold, US Optics, Burris and Others and can offer some very healthy discounts on the cost of these optics.

For load development, we will discuss the specific objectives of the customer, including a variety of factors. The rifle will be delivered with 20 rounds, fine tuned to match your rifle, including a report showing brass type and prep methods, primer type, powder type and weight, projectile type and weight, plus projectile loading depth and ogive location. We will also include a Hornady OAL gage, Bullet Comparator, a set of calipers.

Each rifle is finished with Cerakote in a variety of colors, including the barrel and action.


Here are some of the chamberings we have produced: 223, 223 AI, 6mm Creedmoor, 6mmXC, 6mm Dasher, 6mmBR, 6×47 Lapua, 6SLR, 243 Win, 243 AI, 6.5 Creedmoor, 6.5×47 Lapua, 6.5 SLR, 6.5×284, 6.5×300 Weatherby, 6.5 Addiction, 6.5 SAUM, 270 Win, 7mm Rem Mag, 7mm Ultra, 7mm SAUM, 280AI, 308, 300WM, 300WSM, 375 H&G, 338 Lapua, etc.

Action Options:

Defiance Rebel – Available in Short, Long and XL sizes. (12 weeks delivery on actions from Defiance)

Defiance Deviant – Integrated Rail and Recoil Lug in short and long action sizes. (12 weeks delivery from Defiance)

Stillers TAC Series – In short, long (4-6 week delivery on actions from Stillers)

Kelblys Atlas Tactical – Short and Long Actions (Stock)

Big Horn – In Short and Long Actions, and soon the new Tactical Action, include several upgrades, including a control round feed system. (3-6 week delivery on actions from Big Horn)


MPA/Spencer Barrels – available in a variety of Contours, these 416R Stainless Barrels are handlapped to perfection. Checkout the link above for more information about these barrels.


Jewel HVR

Timney Calvin Elite – 8oz – 2lb pull

Timney 611 – 1.5-4 lbs pull – used only on the Howa Actions

Rifle Basix L1 – 1.5-4lbs pull

Rifle Basix LV1 – 8oz – 2 lbs pull

Trigger Tech – 1-3 lbs

Other Triggers Available

Chassis System:

There are 4 different chassis options for your custom build.

MPA BA Chassis

MPA BA Competition Chassis

MPA BA Lite Chassis

MPA CSR Chassis


All Builds in 6.5mm or smaller carry a 3/8 MOA Accuracy Guarantee

All Builds larger than 6.5mm carry a 1/2 MOA Accuracy Guarantee

Caliber, Chamber and Twist Rate

Calibers and Chambers and Twist Rates: At the time of order, please specify your perferred caliber, chamber and barrel twist rate. Click here for our available options.  Or simply contact MPA with any questions regarding these options.

Please contact Phil ( or Al ( to discuss the details of your custom build.