In Stock Area 419 ARCALOCK 14" Flat MasterPiece Arms BA Chassis Rail
"The Area 419 Arcalock 14″ Flat MPA BA Rail is a rock-solid foundation for anyone running an MPA chassis who wants true Arca versatility without compromise. Machined to perfectly match the MPA fore-end, it delivers seamless fit, zero flex, and the ultra-secure Arcalock interface that locks accessories in place with confidence. Whether you’re shooting PRS barricades or tripod-supported field stages, this rail gives you fast, repeatable positioning and the kind of stability that translates directly into better hits." – Thomas.
The Area 419 ARCALOCK 14" Flat MPA BA Rail delivers a major upgrade to traditional ARCA dovetail systems by introducing a true mechanical locking interface rather than relying on friction alone. Built for demanding precision rifle shooters, the ARCALOCK system prevents accessory drift even under heavy pressure, ensuring absolute stability on barricades and positional shooting platforms. Featuring smooth, non-abrasive serrations designed to work seamlessly with the proprietary ARCALOCK clamp, this rail offers a secure, repeatable, and fully controlled interface. The low-profile flat design is ideal for MPA and similar chassis while remaining highly adaptable to a wide range of rifle configurations. Made in the USA from high-grade aluminium and engineered for both strength and versatility, this rail is an essential upgrade for shooters seeking enhanced reliability, precision, and confidence in every shot.
– Serrated rail sides interface with our proprietary clamp design to mechanically lock it in place so no movement is possible. Serrations are not sharp, will not damage bags or your hands.
– Rail is backwards compatible with standard Arca accessories, but will not be locking without our clamp
– Rail is 14″ long giving you the entire length of the stock forend for attachments. The best part is, it still only weighs in at a paltry 4.1oz
– 65 Engraved positions for the clamp to lock into
– Fits the MPA BA and BA Comp chassis at a minimum, may also fit the Hybrid but we cannot say 100% yet. **Will not fit Lite**
– Spigot supports front of rail, but rail will work even if you do not have the MPA spigot, you may just see a small amount of flex with bipod fully forward
– Access to recoil lug wedge is not obstructed
– Made to the RRS 1.5″ Dovetail Standard, so you can be sure lever clamps will work
– No sharp edges. Every corner is radiused, and every edge is chamfered on the machine. This takes longer to make, but it is the only right way.
– Type 3 Hard Coat anodized for additional durability.
– Made from 6061-T6 Aluminum
– Made in-house here in the USA from USA sourced Aluminum on USA made CNCs
– Rail comes with all necessary hardware
- Rail Length 14"
- Colour Black
- Material Aluminium
- Gun Type Rifle
- Gun Model Universal
- Mounting Points Up to 4
- Country of Origin USA
- Serrated rail sides engage the proprietary ARCALOCK clamp to create a firm mechanical lock
- Non-sharp serrations, ensuring comfort and preventing damage to shooting bags
- Backwards compatible with standard ARCA accessories when locking is not required
- Designed for Manners Composite Stocks, yet adaptable to a broad range of rifles
- Accommodates multiple stock layouts with a front action screw or other mounting locations
- Up to four attachment points for excellent strength and stability on the rifle
- Flat-profile 14-inch layout ideal for MPA BA and similar rifle chassis
- Durable aluminium construction for longevity without additional weight
- Precision-machined edges with smooth finishing for safe, snag-free handling
- Suitable for ambidextrous use, making it accessible for both left- and right-handed shooters
- Made in the USA with premium materials and exacting machining standards
- ARCALOCK 14" Flat MPA BA Rail
Delivery costs & estimated arrival
Find your country below for the delivery charge and how long your order should take to reach you. All orders ship with FedEx. Estimates are in working days and exclude weekends and public holidays.
| Country | Up to 2kg | 2kg – 30kg | Estimated delivery | ||
|---|---|---|---|---|---|
| Order under €350 | Order €350 & over | Order under €350 | Order €350 & over | ||
| Austria | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| Belgium | €8.95 | €14.95 | €14.95 | €14.95 | 4-6 working days |
| Bulgaria | €11.95 | €31.95 | €31.95 | €31.95 | 7-9 working days |
| Croatia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Cyprus | €14.95 | €89.95 | €89.95 | €89.95 | Contact us |
| Czechia | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Denmark | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Estonia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Finland | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| France | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Germany | €8.95 | €14.95 | €14.95 | €14.95 | 5-7 working days |
| Greece | €11.95 | €31.95 | €31.95 | €31.95 | 8-10 working days |
| Hungary | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Ireland | €6.95 | €6.95 | €8.95 | €8.95 | 2-4 working days |
| Italy | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Latvia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Lithuania | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Luxembourg | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Malta | €14.95 | €89.95 | €89.95 | €89.95 | Contact us |
| Monaco | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Poland | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Romania | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Slovakia | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Slovenia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Spain | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| Sweden | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
Returns & withdrawal
Which option you use depends on why you are sending the item back.
Changed your mind?
You have 14 days from receiving your order to withdraw from your purchase. Use our Withdrawal from Contract form to tell us. It is the quickest way, and we will then email you a free returns label.
If you would rather post the item back yourself to our returns address in Ireland, you pay the postage. Full details are on our Returns page.
Withdrawal from ContractFaulty, damaged or wrong item?
If your item arrived faulty, damaged or not what you ordered, please follow the steps on our Returns page. We cover the cost of returning these items.
Full details of all our return options are on that page.
Returns pageDelivery prices are shown in euros and confirmed at checkout.

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