Introduction to the Walther Rotex RM8 series

The Walther Rotex RM8 series is a range of classically designed regulated sporting rifles that are as much at home on the range as they are in the field. Available with beech and synthetic stocks and in .177 and .22 calibres, the action uses a bolt-operated eight shot magazine system. The range includes high powered options, as well as lightweight and ultra compact variants. As expected, all Rotex RM8 rifles use a Lothar Walther barrel.

About Walther / Umarex

Somewhat confusingly, Walther branded air rifles are marketed by Umarex. Both companies are part of the German PW Group. Lother Walther is one of the oldest and most-respected names in shooting, famed for producing some of the best barrels in the world. In its own right, Umarex is a prolific manufacturer of replica firearms and was founded in 1972. It holds licenses to reproduce replicas of some of the world’s most iconic gun brands.

Walther Rotex RM8 Review

The Walther Rotex RM8 was launched in 2014. Since then the line has expanded over time to include four rifles that share many components but are very different in their own right. Designed specifically with hunters in mind, the rifles are more than adequate for use on the range and for target shooting too thanks to the high quality barrel and an adjustable two-stage trigger which makes them capable of high degrees of accuracy. The ambidextrous stocks, which include wood (the ‘Classic) and synthetic options (Varmint), are designed by Minelli of Italy and make attractive as well as highly functional handles. Consistent across the range is an eight shot rotary magazine that is operated by a bolt action and locked into place with a sliding catch, as well as a resettable safety catch which sets every time the action is cocked. Rotex RM8 rifles all take a maximum charge of 232 bar and are available in both .177 and .22 calibres with power outputs up to 22 ft. lbs.

Walther Rotex RM8 Product Range

Walther Rotex RM8 Classic

With its sculpted Minelli-designed beech stock, the Walther Rotex RM8 weighs 3.6 kilos unscoped and whilst that is quite hefty for an air rifle, the balance is superbly neutral. Length is 1040mm and the scope rail is a dovetail design. There is stippling on the pistol grip and all around the forend, the under-side of which houses the pressure gauge and fill port to accept a 232 bar fill for the 200cc bottle. Shot count is a claimed 150 for .177 and 180 for .22 calibre at 12 ft. lbs. Higher powered options – 22 ft. lbs. in .22 and 17 ft. lbs. in .177 are available and will result in fewer shots. The eight shot rotary magazine is made from metal and is simple and reliable. With the bolt pulled back, it is installed from the left and held in place with a sliding retainer catch. A bolt cocks the regulated action, cycles the pellets and sets the safety catch. The Lothar Walther barrel has a sculpted muzzle weight at the front that should not be confused with a silencer. The barrel is not shrouded so you’ll probably want to fit one to the ½ inch UNF thread.

Walther Rotex RM8

Walther Rotex RM8 Varmint

The Rotex RM8 Varmint variant has a black plastic stock that is similar in shape to the wooden stocked Rotex RM8 Classic but is distinguished by a thumbhole pistol grip design. There is stippling to aid grip for both hands as well as a short picatinny accessory rail on the underside of the forend, although attachment for a scope is via a dovetail rail. Shorter than the wooden stock RM8 at 950mm, the RM8 Varmint is heavier at nearly 3.9 kilos without a scope. The Lothar Walther barrel comes with a muzzle weight that can be removed to fit a silencer to the ½ inch UNF thread. Like other rifles in the range, the RM8 Varmint has a two-stage adjustable trigger and uses the eight-shot metal rotary magazine, which is locked into place with a retaining catch, and a bolt action to cycle pellets, cock the action and set the safety catch. The 200 cc air bottle takes a 232 bar fill via a port underneath the forend next to the pressure gauge. In 12 ft. lbs. format, the RM8 Varmint claims to deliver 150 shots in .177 and 180 in .22 calibre – a figure that is lower for higher powered variants of 17 ft. lbs. in .177 and 22 ft. lbs. in .22.

Walther Rotex RMB Varmint CA

Walther Rotex RM8 Varmint CA

Although nearly identical to the standard RM8 Varmint, the CA version features a number of subtle but significant engineering enhancements. These include a breech receiver milled from a single piece of aluminium and a carbon fibre barrel shroud, a redesigned cocking bolt handle and an integrated picatinny scope rail. Combined, these changes result in considerable weight savings; the RM8 Varmint CA tips the scales at less than 3.2 kilos and measures 960mm. In many other aspects, the rifle is the same as others in the range, using the metal rotary magazine and sliding retainer catch arrangement, two-stage adjustable trigger, bolt action and automatic safety catch. Available in .177 and .22 but with no high power options, the 12 ft. lb. rifle delivers around 150 .177 shots and 180 .22 shots from a 232 bar fill, which is achieved by using the quick fill port underneath the stock forend. Though the carbon fibre barrel shroud reduces noise, the muzzle break on the end of the Lothar Walther barrel can be removed to allow a silencer to be fitted to the ½ inch UNF thread.

Walther Rotex RMB Varmint CA

Walther Rotex RM8 Varmint UC

The UC, or ‘Ultra Compact’ variant is, as the name suggests, a shorter version of the Walther Rotex Varmint RM8. It shares all the same characteristics of the larger rifle – eight shot metal rotary magazine, bolt action cocking system and automatic safety. The plastic thumbhole stock is the same as well. In fact, it is only the shorter 340mm Lothar Walther barrel that is different, making the rifle just 916mm long and 3.75 kilos heavy.

Walther Rotex RM8 Varmint UC

Is the Walther RM8 right for me?

The Walther Rotex RM8 series is a tough and durable hunting rifle, especially the Varmint derivatives with their plastic stocks. The 200cc air bottle gives plenty of shots and the high quality Lothar Walther barrel and regulated action combined with a more than competent adjustable trigger make it capable of levels of accuracy that would embarrass more expensive hardware.  

Best suited to?

The Rotex RM8 series is designed with hunters in mind who will love the combination of a design that is both simple and effective as well as tough and durable. The quality of components, not least the barrel, means it won’t let you down on the range or HFT/FT course either.

Pros and Cons

There’s a lot going for the Rotex RM8 range, not least the wallet-friendly price of several of the models. The build quality is superb with performance to match. Plastic stocks aren’t for everyone, especially as that of the Rotex RM8 Varmint rifles shouldn’t be confused with soft touch synthetic stocks. The rifles are also quite heavy, though neutral balance makes the extra weight largely unnoticeable.

Our Recommended Accessories for the Walther Rotex RM8:



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Walther RM8 Specifications

Specifications Walter Rotex RM8 Walther Rotex RM8 Varmint Walther Rotex RM8 Varmint CA Walther Rotex RM8 Varmint UC
Weight kgs 3.6 3.87 3.18 3.75
Stock options Beech Black plastic Black plastic Black plastic
Length mm 1040mm 950mm 960mm 916mm
Barrel mm 500mm 500mm 500mm 340mm
Trigger Adjustable two stage Adjustable two stage Adjustable two stage Adjustable two stage
Regulated Yes Yes Yes Yes
Calibres .177 and .22 .177 and .22 .177 and .22 0.22
Magazine .177 / .22 8 8 8 8
Power options ft. lbs. 12, 17 and 22 12, 17 and 22 12 12
Shot count (12 ft. lbs) .177/.22 150/180 150/180 150/180 150/180
Fill pressure 232 232 232 232
Safety catch Automatic resettable Automatic resettable Automatic resettable Automatic resettable
Moderator 1/2 inch UNF 1/2 inch UNF 1/2 inch UNF 1/2 inch UNF

Comparison with the Walther RM8 range

Walther Rotex RM8 v Walther Rotex RM8 Varmint

There’s little to choose between these two variants other than the differences in the stock. The Rotex RM8 has a more traditional wooden stock whilst the RM8 Varmint has a black plastic thumbhole handle and is a little heavier.

Walther Rotex RM8 Varmint v Walther Rotex RM8 CA

At first glance it’s hard to see the difference between these two rifles, certainly anything that justifies the Varmint CA’s higher price. However, the differences are subtle but significant, such as the fact that the breach receiver is milled from a single billet of aluminium. The changes add up to a considerable weight saving.

Other Air Rifles to Consider

Other bolt action bottle rifles to consider include the BSA R-10 SE, Daystate Red Wolf, Daystate Wolverine R and FX Crown. Bolt action cylinder rifles include the Daystate Huntsman Regal and Air Arms S410 series.

Walther RM8 disassembly

Here you will find disassembly diagrams for the Walther RM8 taken from All credit for these images goes to John Rothery Wholesale Ltd.

Walther Rotex RM8 Disassembly Diagram