MRDS platform
The Case for a 7.62×39 Roller Delayed Carbine
You certainly have your choice of cartridge pairings with AR-style rifles, and even if you stray into the realm of roller-delayed blowback systems such as the MRDS platform developed by Zenith Firearms, you still can take your pick. As might be expected, 5.56 is well-represented, but there are many other suitable alternatives as well. The […]
Read More4 Ways in Which a ZF-300 Might Outperform Your 5.56 Rifle
A large number of sporting rifles (not just AR-15s and clones) are chambered in 5.56, if not an outright majority. It is a low-cost, ubiquitous caliber that shoots flat, produces little recoil, and which has a ton of use cases, from hunting to sport shooting and even some defense applications. But 5.56 is only one […]
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The MRDS Platform: Spotlighting the ZF-350
There are some states, particularly flat states in the Midwest, where hunting, especially for deer, is not permitted with necked rifle cartridges. The rationale behind the laws prohibiting necked cartridges is that, typically, straight-walled rifle cartridges fire bigger, heavier bullets at slower velocities, which have more limited ranges than their necked-cartridge counterparts. So, in essence, […]
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The Differences Between Direct Gas Impingement and Zenith Firearms’ MRDS Platform’s Roller-Delayed Blowback
The vast majority of AR style rifles, including AR pistols, or ARPs, are actuated by an operation known as direct gas impingement. Some, such as the MRDS platform used by Zenith Firearms in models like the ZF-56 and ZF-300, utilize a modern roller-delayed system, which gives the MRDS its name. But how do these differ, […]
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