Ritter & Stark SX-1 MTR [UPDATE]

 

The SX-1 MTR is an Austrian bolt-action rifle with impressive modularity. It was designed by the Russian team that helped develop the Orsis T-5000. They created a platform that lets the end user customize the rifle not only with stocks, pistol grips, and triggers but also with different calibers.

The SX-1 can be chambered in .308 Win, .300 Win Mag, and .338 Lapua… almost as if they knew all my hopes and dreams… clears throat As I was saying, the modularity of this rifle is rather impressive. The Picatinny rails are attached directly to the barrel rather than the receiver, so you don’t have to rezero the rifle every time you change calibers if you want to mount three different optics to the barrels.

The SX-1 does not use three separate bolts but rather one bolt, and with a quick change of the bolt head, you can switch calibers. Okay, so the carrying case is going to be big to fit all that expensive glass you’re going to have mounted to each barrel, but we can save some space with the lack of three distinct bolts.

When it comes to how the rifle feeds, you might be asking, am I going to be spending hundreds on extra mags for each caliber? No, because they offer magwells that use SR-25-style mags for your .308 and Accuracy International mags.

The trigger is Remington 700 compatible, so you can install aftermarket triggers for this rifle, which is an excellent feature.

The stock and pistol grip use standard AR-platform stocks and grips, so you can customize the rifle even more. Personally, if I owned this, I would slap on a SIG brace and call the whole rifle my pocket pea shooter.

I don’t know about you, but I only would shoot this rifle off-hand from a standing position, with a sig brace and arm fully extended. That is how you get SUB SUBMOA.

[Insert epic photo of Atticus riding a Griffin while shooting this rifle with a Sig brace]

 

The FN Ballista shares similar features in that it can be rechambered for the same calibers. However, it falls short on some of the modularity that the Ritter & Stark SX-1 MTR offers—such as interchangeable stocks, and possibly the trigger. (I can’t remember if the FN Ballista uses a Remington 700-compatible trigger or not.)

On the topic of Remington Defense, we look to their XM2010.

“Are you noticing a theme here? While this rifle is essentially just an upgraded version of the Remington 700 (like the M24 or M40), it shares the same sleek, modern features as the Ritter & Stark SX-1 MTR and the FN Ballista—only without the interchangeability. (Get on that, Remington! And make it available to civilians, too.)

I still haven’t found anyone selling the Ritter & Stark SX-1 MTR in the US. I was hopeful back then that they might bring it here by 2017, perhaps with a big introduction at SHOT Show 2017.

(Update from Ritter & Stark): ‘Only one important thing you missed, I think: the bolt locks directly into the barrel breech—not a barrel extension—with locking lugs machined right into the breech. The main idea was to create a very stable shooting platform and eliminate any parts between the scope and the barrel. So basically, the rifle itself is the barrel.'”

(Note: As of 2026, the Ritter & Stark SX-1 MTR appears to have limited to no new availability in the US—the company faced insolvency around 2018 and ceased operations, so examples are mostly on the used/secondary market if they turn up at all. EuroOptic carried them back in the late 2010s, but that’s

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