Anschutz nomenclature and model numbering is often confusing, even for experienced Anschutz users.
The Anschutz Match 54 single shot action (not to be confused with the 54 action repeaters) are Anschutz's top-of-the-line. They are the heaviest in terms of receiver diameter and the barrels put on them. They are relied on by serious shooters for the best levels of accuracy from Anschutz .22LR models. The Anschutz 64 action, recently discontinued after some 70 years of productiton, is less expensive and lighter. Like the 54, the 64 has single shot and repeater versions. The Anschutz 1761 series of rifle models has replaced the 64 action models.
The Match 54 single shot action has changed over time. To keep things as simple as possible, the earliest of these models, which first appeared around 1954, didn't have model numbers, except for generally being referred to as Model Match 54, available in a "free rifle" model (for shooting men's competition in three positions, standing, kneeling, and prone) and a prone rifle model. By around 1962-63 Anschutz began using model numbers. The free rifle became the 1413, the prone the 1411. A lighter barreled model was also available, which became the 1407. It had a 66cm barrel that was 22mm in diameter. The barrels for the 1411 and 1413 were 69cm in length and 24mm in diameter. These barrel dimension have been in use over the years, with a few other variations on certain models.
In 1976, Anschutz introduced changes to the bolt and trigger and receiver. They still called the rifles 14xx series (e.g. 1407, 1411, 1413) but many shooters refer to these with a "16" prefix rather than the "14" prefix -- 1607, 1611, 1613.
In 1980, Anschutz made further changes and the 18xx series of rifles was the result, again using the 66cm and 69cm, light and heavy barrels, respectively. Around 1987 Anschutz introduced the 19xx series of rifles -- e.g. 1907, 1911, 1913. These are currently in production.
Further changes resulted in the 20xx series of rifles and the 54.30, both variations of the original Match 54 action. These are also currently in production.
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The 64 action models used in target shooting have generally been designed and used by shooters entering the sport and/or by junior shooters.
The 1903 model referred to in the quote is the "Junior" model. It is the last iteration of the 64 action target rifle series, which was preceeded by the 1403, followed by the 1803.
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If anyone is considering a barreled action alone with a self-made "stock," they should be aware that the way the barreled action fits the "stock" or chassis or whatever frame or rig that's used for holding it is very crucial to it's performance. When performance is a key requirement, there isn't anything about fitment between a top tier barreled action and "stock" that should be thought of as "easy" produce.
Serious BR shooters glass bed and pillar the barreled action in their stocks for the optimum fit between barreled action and stock. They do this to optimize the performance of the rig. Some have even epoxy the two permanently together, but this is not for anyone but the most serious and experienced builders.
If something like a "rail gun" is the goal, it may be possible to manufacture or obtain something like the rig shown below.
It's worth noting that on the rig on the first the barrel is free floated, while on the next, the barrel is clamped. Both rigs are the same make.
