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 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

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

The MRDS platform that we’ve developed, the heart of which is a roller-delayed blowback system, is smooth-shooting, extremely reliable, suppresses well, and has relatively long-lived components because of its simplicity when compared to a traditional gas impingement system, such as that used by AR-15 rifles and similar platforms. With that said, as is the case for any

PCCs, or pistol-caliber carbines, are not rare. Roller-delayed PCCs, which rely on roller-delayed blowback operation as opposed to direct gas impingement, are. Most ARs and AR-style platforms use gas impingement, which requires a gas block, tube, a bolt carrier group with a gas key, and then a buffer system which consists of a tube that houses

Anyone who’s a fan of roller-delayed actions who is also interested in adding a PCC, or pistol caliber carbine to their collection, should look into our MRDS, or modern roller delayed system, as the perfect solution. Here’s your primer on our modern roller delayed PCC. Why a Pistol Caliber Carbine (PCC)? In a nutshell, a

Whether you shoot a ZF-5 or an actual HK MP 5, the truth is that these subguns are a little limited in terms of what attachments you can add, based just on the number of mounting points. The MP5 accessories and parts covered in this short post will help change that paradigm. Here are some

The HK MP5 doesn’t have much going on that could give you cause for complaint. The action is legendary and the compact footprint has proven indispensably effective in CQB encounters in the hands of law enforcement officials around the globe. Perhaps you could bemoan the price – the HK MP5 is famously expensive – but

Looking for a compact MP5 variant but want to buy American and save some money on the whole ordeal? There’s no better option on the market right now than our very own ZF5-P. Here’s what you should know about it. A Compact Package, Smooth Roller-Delayed Blowback Performance Like our other roller-delayed blowback firearms inspired by

Two of the most common handgun action operations are recoil and direct blowback operation, each of which offers a number of relative advantages and disadvantages. That said, there is another type of blowback operation, called a roller-delayed blowback action, which, famously, has been utilized by the HK MP5 and American-made MP5 clones like the ZF-5.

The MP5 platform is iconic—renowned for its reliability, roller-delayed blowback operation, and battlefield-proven design. But there are certain components that can take your MP5 to the next level in terms of performance, ergonomics, and aesthetics. Here’s a breakdown of the best MP5 parts to help you build a better, more personalized firearm.   1. Extended