
A Caliber Comparison: Which MRDS Platform Is Best for You?
Our MRDS platforms are available in numerous chamberings and in a diverse range of footprints and barrel lengths. Whether you are looking for a compact PDW that will perform like an ARP, or a full-size rifle that you’ll use in competition or take in the field for the purpose of hunting, you have options. But

Saving Money on Shooting Sports: MP5 Edition
Make no mistake about it, even though participation in the shooting sports is way up (especially among first-time gun owners) the price of doing so has also gone through the roof in the past few years. Not only have guns themselves sharply appreciated in price, but the price of ammo has doubled, tripled, in some

Comparing Rifle Cartridges Used by the MRDS Platform
The MRDS platform supports numerous different rifle and PDW-sized builds at Zenith Firearms, from carbine-sized builds like the ZF-56 16” to PDW-style builds like the ZF-300 with a 7.5” barrel. We’ve also configured the platform around several different rifle cartridges, each of which offers something a bit unique to modern shooters. We’ll break down the

Roller Delayed PCC Chambering: 9mm vs. 10mm
Considering purchasing a roller-delayed PCC and wondering whether a 9mm or 10mm chambering is better for you? You’re in the right place. We’ll break down the differences from a high level here. High Level Overview To keep things as simple as possible, the 9mm Luger is a smaller, more affordable cartridge than the 10mm. It produces less

Every Reason a 9mm Roller Delayed PCC Is a Great Choice, Period
You can buy a roller-delayed AR-style platform, chambered in 5.56. It will offer solid stopping power and be great for everything from plinking to competition. Or you can buy a 9mm roller-delayed PCC, and there are more reasons than you probably expected that the performance of one will surprise you. That being the case, here are

Chambering a Roller-Delayed PCC in 10mm Auto: What to Know
Building or buying a roller-delayed PCC can offer you a lot of flexibility that rifle-caliber builds just won’t. For one, a PCC will be shorter and more compact than most rifle-caliber builds (unless you are looking at the potential to build an ARP) and on top of that, handgun ammo is generally cheaper and produces less recoil

Recommended Roller Delayed PCC Upgrades and Attachments
Our MRDS platform is exceptionally versatile, modular, and thanks to the platform’s numerous attachment points, incredibly expandable. With that being said, what an optimized roller-delayed PCC platform looks like depends on what your end goal is, be it law enforcement, competition, or just enjoying a day on the range. Fortunately, these platforms offer an endless number of

General Cleaning of the Roller-Delayed Blowback ZF-56
Congratulations on your purchase of the modern roller-delayed blowback system-powered (MRDS) ZF-56 rifle. Smooth-shooting, accurate, reliable, and built to industry-leading tolerances and specifications, the ZF-56 is a miracle of modern roller-delayed engineering. All the same, like all firearms, the ZF-56 will benefit immensely from routine cleaning. Here’s your primer on how to administer basic cleaning to the

Strong Use Cases for 4 of Our MRDS Platforms
Our MRDS platforms offer several significant advantages over AR-style platforms. They are smooth shooting, more reliable, have no gas system, have (generally) long-lasting components, and are entirely bufferless. We could go on with that, but for the time being, we want to give the spotlight to four of the platforms we’ve developed that are built around our

6 Advantages of a 9mm Roller-Delayed PCC
There are considerable advantages to building a pistol-caliber carbine, or PCC, that would be sufficient to fill an entire, dedicated article. With 9mm, also, you don’t need to rely on a gas system. Some AR pistol builds are bufferless and rely on direct blowback to cycle the action. This roller delayed PCC design has many advantages which

The Best Advantages of Roller Delayed Blowback Platforms, in One Place
The vast, overwhelming majority of AR rifles and other modern sporting platforms rely on a gas system to operate their actions. As reliable and time-tested as a gas impingement action, or a gas piston action, can be, it is still important to recognize that this is not your only option. There are several alternatives, and

ZF-5/MP5 Magazines: FAQs
The ZF-5 and MP5 magazines we sell here at Zenith Firearms exhibit a high level of quality as well as several shooter-friendly features. As a result of their popularity, we rounded up some of the more common questions associated with these magazines and answered them here. See if your question is answered below and if not, feel
