RPA Quadlock

The History of RPA International

RPA International Limited (formerly known as RPA Precision Ltd.) is a British company that designs and manufactures high-precision bolt-action rifles and actions. The company was founded in the early 1990s, and quickly gained a reputation for producing some of the most accurate rifles in the world.

Their rifles are known for their use of advanced manufacturing techniques, such as computer-aided design (CAD) and computer-aided manufacturing (CAM). The company also uses a variety of high-quality materials in its rifles, such as stainless steel and carbon fiber. The barrels are precision-machined to ensure the highest possible tolerances. This ensures that the barrel is perfectly straight and that the bore is perfectly smooth. RPA is also well-known for its Quadlock and Quadlite actions that are the heart of most of their rifles.

Unfortunately, the information about the specific historical events of the company is quite scarce. The company’s site is still operatable in 2023, however, some informal sources suggest that the RPA International was purchased by an asset sale by Rangemaster Precision Arms Limited in 2011. RPA International's liquidation was apparently precipitated by its bankers' refusal to extend the loan payment period.

RPA Quadlock Action Review

RPA Quadlock is an action built by the RPA company and the heavier, bulkier version of their actions. Like the Quadlite, the Quadlock features a large stainless-steel block with four locking lugs that lock safely into the action’s housing. To guarantee the tightest tolerances, the actions are carefully constructed using premium materials. This guarantees the barrel and bolt are perfectly aligned and the action components are corrosion resistant and have a low index of friction, minimizing the wear.

The actions can be supplied with two-stage trigger systems that are fully adjustable for pull of weight and come factory pre-set at approximately 1500 g. Since the receiver and bolt of the Quadlock are made from solid billets of high-tensile steel, there are no internal parts that could come free and injure the user.

Contrary to the lighter Quadlite models, the Quadlock comes in a single shot configuration only and is not available as the repeater version. The action has a rapid 45-degree bolt throw and a pilaster-style bolt body with 360-degree contact. On the flat top of the action there are six drilled and tapped holes for scope mounting purposes. Quadlock is available in .308 Win. and magnum bolt faces.

The upper part of the Quadlock receiver is drilled and tapped for scope mounting purposes. There are three holes on the front and three holes on the rear end of the mounting surface.

RPA Quadlock Action, with .308 Win. bolt face

Figure 1: RPA Quadlock Action, with .308 Win. bolt face (Source: https://bulletin.accurateshooter.com/2012/08/new-round-rpa-action-released-v-block-compatible/)

Scope Mounts Interchangeable With RPA Quadlock Action

Rifles That Have One-Piece Scope Mounts Interchangeable With RPA Quadlock Action

For one-piece mounts to fit on a rifle, mounting surfaces on these rifles must match in every dimension.

Rifles That Have Two-Piece Scope Mounts Interchangeable With RPA Quadlock Action

To meet interchangeability conditions, two-piece mounts must match in all dimensions except the B distance. B distance can vary because two-piece mounts can be installed and adjusted closer or further apart.

Unfortunately, we were unable to find specific holes spacings for RPA Quadlock action and are thus unable to provide you with a finite list of interchangeable scope mounts. Should you happen to own this rifle and would be willing to share with us more information regarding interchangeability, we kindly ask you to contact us at [email protected]

Thank you for your help!

Scope Mounts Interchangeable With RPA Quadlock Action

Picatinny Rails for RPA Quadlock Action

Consider upgrading your RPA Quadlock receiver with this aluminum Picatinny rail if you want more scope mounting choices. It is produced by Tier-One, an American corporation, and is covered by a ten-year warranty.

Help Us Build Our Riflescope Mounts Database

If you happen to own this or any other rifle, we would appreciate it if you could help us expand our database by sending us some photos of the rifle receiver (the bare mounting surface of the rifle without the scope mounts installed). For your help, our company offers a fair return in terms of practical rewards.

Please send us an email for more information. You can contact us here: [email protected]

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RPA Quadlock

The History of RPA International

RPA Quadlock Action Review

Scope Mounts Interchangeable With RPA Quadlock Action

Rifles That Have One-Piece Scope Mounts Interchangeable With RPA Quadlock Action

Rifles That Have Two-Piece Scope Mounts Interchangeable With RPA Quadlock Action

Scope Mounts Interchangeable With RPA Quadlock Action

Picatinny Rails for RPA Quadlock Action

Help Us Build Our Riflescope Mounts Database

Tier-One Picatinny, RPA Quadlock

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RPA Quadlock

The History of RPA International

RPA Quadlock Action Review

Scope Mounts Interchangeable With RPA Quadlock Action

Rifles That Have One-Piece Scope Mounts Interchangeable With RPA Quadlock Action

Rifles That Have Two-Piece Scope Mounts Interchangeable With RPA Quadlock Action

Scope Mounts Interchangeable With RPA Quadlock Action

Picatinny Rails for RPA Quadlock Action

Help Us Build Our Riflescope Mounts Database

Tier-One Picatinny, RPA Quadlock

VIDEO

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