Scope mounts with Bases

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Repeatable Mounts

Pivot Mounts

Introduction- scope rings and scope bases

Inside the arms industry, the term "scope mounts with bases" always refers to separate scope rings and base for them.

The whole meaning is in the scope bases, mounted on the rifle first, and then putting the correct rings (or direct rails for scopes in some cases – Swarovski SR, Zeiss ZM/VM, etc.) on them.

On the market, Weaver bases and rings that work by the same principle can be found, but many manufacturers offer sets with smaller base.

The most common scope mount

The most common scope mounts with bases are the ones with:

16mm dovetail bases and
19mm dovetail bases.

Scope mounts with Weaver or Picatinny bases are rarely sold as sets, for example.

There is an interesting fact that EU and US manufacturers of mounts with bases have a similar design of bases (EAW, Recknagel, Contessa, Talley).

Scope mounts with bases have in common that there is always the two-piece design of the mount and scope rings are tip-off rings with recoil stopper in one of the bases.

Scope mounts with Bases - Scope mounts, scope rings and bases

Leupold STD Two-Piece Base & 25.4mm Ring Set

The most popular producers of this type of mounts are:

EAW,
Rusan,
Recknagel,
Henneberger,
MAK,
Talley etc.

Advantages of mounts with bases

Scope mounts with bases do not have front and rear piece linked together, which means less weight and elegant design of the mounts.
Compared to some of the other designs, mounts with bases are available at affordable prices (good value).
This type of design also allows easy production, because only bases are different for each rifle and scope rings (upper part) can remain the same.
This is the main reason why they are easier and cheaper to produce, compared to some others and why they are popular with manufacturers.
An important advantage of scope mount with direct base is also the possibility of windage adjustments.

Disadvantages

On the other hand, there are some shortcomings with mounts with bases, also.
They are often hard quite hard to mount. It is because of the fact that bases have to be aligned in all directions and heights (which might be difficult to achieve). If this is not so, scope can be flexed and eventually damaged.
These scope mounts are also made of many connecting pieces, which might end up with more possibilities of failure.
The small connecting surface between the scope and the mounts also does not go in favor for them or their rigidness.

Does this type of Scope mounts need lapping?

Probably, yes. At least, it is somewhat highly recommended.

Mounts with bases are known for harder installation of them because it can get really hard to mount both bases with 100% alignment of the scope rings.

Lapping is a useful process that might solve the problem of miss fit. It is also the most simple way to achieve 100% alignment of both parts of the mount and it also helps to reduce strains and deformations in materials.

An alternative to lapping could be the bedding of mounts with a special mixture (similar to glue) that becomes extremely hard when it dries.

This helps to add some rigidness to the installation of scope mounts and it also helps to achieve better alignment of both parts of the mount.

Conclusion

Scope mounts with bases are often available at affordable price and they do look elegant (especially on hunting rifles).

They are also light because of the missing connection between the front and rear piece, but (due to this reason) might be hard for mounting.

We would always recommend a skillful gunsmith to do it.

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Strasser Ball Seat Scope Mount, 34mm, Strasser RS 14

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ERAMATIC-GK Pivot mount for Steyr SBS-96, Pro Hunter, Classic, SM12, 30 mm

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Rusan QR Roll-Off Rings with Extension, 19 mm Rail, 40 mm

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There are two terms found for similar thing: quick release scope mounts and quick detach scope mounts. Term quick release scope mounts is used mostly in Europe and quick detach scope mounts is used mainly in USA, although they mean the same thing. With these terms we describe a scope mount that can be quickly removed from the rifle in the field without using any tools and quickly attached back on the rifle when needed.

Main advantages:

possibility to use multiple scopes on the rifle,
easy transportation of the scope and the rifle separately,
if scope fails, it is possible to immediately detach it and use iron sights.

FIXED vs DETACHABLE scope mounts

Fixed scope mounts are mounted to the rifle with screws and sometimes even with glue. This means that it is impossible to attach or detach the scope mount using bare hands without using tools. It also means that they are not meant for constantly being attached on or detached off the rifle. Once you screw the mount on the rifle, it normally stays there for a longer period of use.

Detachable scope mounts offer possibility to attach or detach them without using any tools. This is extremely handy while transporting the rifle and the scope separately and it also offers multiple solutions of different optics on the same rifle. Detachable scope mounts can be attached or detached from the rifle in a matter of seconds, using bare hands.

Fixed Mount

Fixed Mount

DETACHABLE vs REPEATABLE scope mounts

It is important to know and understand expressions “detachable” and “repeatable” while talking about scope mounts. Term detachable scope mounts implies scope mounts that can be quickly attached or detached without using any tools. However, when you detach this kind of mount and attach it back on the rifle, it is recommended to zero the rifle before using it again. Procedure of detaching and again attaching the mount will probably need a sighting in before next shooting, because mount will not be secured on the rifle in the perfectly same position and conditions as it was before detaching it off the rifle.

On the contrary, repeatable scope mounts are most sophisticated mounts. These scope mounts are also detachable, however – they provide removing scope from the rifle and attaching it back again without zeroing the rifle every time. This means that they are made more precisely and that they are offering a possibility of using different optical sights / scope on the same rifle. These mounts are ideal for hunters who can use optical and iron sights interchangeably, depending on the needs in different situations. With the repeatable scope mounts, it is useful to keep them oiled as well as the upper part of the rifle, so that repeatability is more ensured. With a touch of oil, the repeatability might be better, because parts of the mount will always return to their previous locations.

Different types of repeatable scope mounts:

Pivot mounts,
Dentler mounts,
Picatinny repeatable mounts,
12 mm dovetail repeatable mounts (for break barrel rifles, such as Steyr Duett, Blaser B750, Fair Combi, Fair SLX 800, Bettinsoli rifles, etc.),
Original repeatable mounts, made by manufacturers of rifles for their rifles (Blaser mount, Sauer SUM mount, Mauser M03 mount, Steyr Monoblock mount, etc.).

Repeatable Mount

Repeatable Mount

TIP OFF / ROLL OFF vs SLIDE ON mounts

Nowadays, there are a whole lot of different possibilities, made for attaching riflescopes on the rifles. There are also a lot of different expressions, having the same meaning. It is good to know that tip off and roll off mounts are basically the same thing. They represent quick release scope mounts for dovetails and rails which can be rolled or tipped off the rail vertically to the side of the rail. On the contrary, there are also slide on mounts available on the market. They represent quick release scope mounts that can be slided on or off the rail or dovetail from front or rear side of the rail / dovetail. All of these expressions are mainly used for separate rings that can be attached to the rails / dovetails. As far as functioning the rifle, it does not matter which one of these mounts you choose – tip / roll off or slide on mounts. If they are installed correctly, they are all going to work. However, the main difference between them is the principle of attaching them on rails on dovetails.

Slide On Mount vs. Roll Off Mount

Slide On Mount vs. Roll Off Mount

Scope mounts with Bases

Sub Categories

Introduction- scope rings and scope bases

The most common scope mount

The most popular producers of this type of mounts are:

Advantages of mounts with bases

Disadvantages

Does this type of Scope mounts need lapping?

Conclusion

Strasser Ball Seat Scope Mount, 34mm, Strasser RS 14

ERAMATIC-GK Pivot mount for Steyr SBS-96, Pro Hunter, Classic, SM12, 30 mm

Rusan QR Roll-Off Rings with Extension, 19 mm Rail, 40 mm

VIDEO

FIXED vs DETACHABLE scope mounts

DETACHABLE vs REPEATABLE scope mounts

TIP OFF / ROLL OFF vs SLIDE ON mounts

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Scope mounts with Bases

Sub Categories

Introduction- scope rings and scope bases

The most common scope mount

The most popular producers of this type of mounts are:

Advantages of mounts with bases

Disadvantages

Does this type of Scope mounts need lapping?

Conclusion

Strasser Ball Seat Scope Mount, 34mm, Strasser RS 14

ERAMATIC-GK Pivot mount for Steyr SBS-96, Pro Hunter, Classic, SM12, 30 mm

Rusan QR Roll-Off Rings with Extension, 19 mm Rail, 40 mm

VIDEO

FIXED vs DETACHABLE scope mounts

DETACHABLE vs REPEATABLE scope mounts

TIP OFF / ROLL OFF vs SLIDE ON mounts

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