Those of you who landed here looking for a viable platform (or parts) for a pistol-caliber carbine or an SMG like an MP5 may be familiar with a roller delayed blowback system, which has serious advantages over both direct blowback and recoil-operated systems. In fact, roller delayed blowback actions have advantages over gas impingement too.
If you’re thinking about building a roller-delayed blowback 9mm, regardless of the platform, it’s better – and here are the facts.
Lower Recoil, Smoother Shooting
Roller-delayed blowback 9mm actions lack the locking lugs of other action types. Rather, rollers integral to the bolt carrier delay the cycling of the action until the bore pressure drops to a safe level to do so.
As a result, roller-delayed blowback actions – and not just those built around 9mm Luger – are much smoother shooting and produce less recoil than alternative firearm actions.
Because of the smoother operation and lower recoil produced by roller-delayed blowback operation, smaller-framed and lighter shooters can shoot for longer with less fatigue, not to mention make potentially faster follow up shots.
Improved Reliability
In a traditional straight blowback system, a heavy bolt and strong recoil spring are necessary. The nature of the operation also produces a lot of fouling that can hamper cycling action, feeding and overall reliability.
Because roller-delayed systems are smoother-operating overall, they are less sensitive to fouling and other environmental factors, exhibiting improved reliability and consistency.
System Longevity
The smoother-shooting operation of a roller-delayed system incurs less wear and tear on the system components, notably the recoil spring. It also results in less friction and wear on the bolt carrier and receiver, too.
Compact Design
Most PCCs are direct-blowback, but it’s still worth a callout if you’re looking at a 9mm carbine that could have a gas impingement system. If it has a gas impingement system, it needs a buffer system to cycle, which will make it bigger and heavier. A roller-delayed blowback offers the space-saving advantage of forgoing the buffer system, plus it’s smoother shooting than a direct blowback system. You get the best of both worlds in a more compact package.
Potentially Improved Accuracy
The precisely controlled bolt speed and lower muzzle flip associated with roller-delayed blowback 9mm platforms mean improved handling, greater control, and potentially improved accuracy for shooters.
Specifically, the smoothness of a roller-delayed blowback action facilitates faster, more accurate follow up shots and more confident handling.
Looking for a Roller-Delayed Blowback 9mm?
Want to learn more about the potential benefits associated with roller-delayed blowback actions in general, or to see what options are at your disposal for a pistol-caliber carbine build?
Visit Zenith Firearms. Renowned for the ZF-5, an American-made MP5 clone, the company has proliferated its roller-delayed blowback designs to other platforms and calibers, and offers not just complete, assembled SMGs and PCCs, but also receivers and parts for tinkerers and homebuilders.Zenith Firearms is also planning to release the ZF-9 to their MRDS PDW lineup, a modernized 9mm roller-delayed platform with a fully ambidextrous design, and available with either a Scorpion or Glock-mag compatible lower.
For all things roller-delayed blowback, they are the premier source. Visit their website or get in touch with their customer service team today.
For more information about mp5 magazine and MP5 Case Please visit : Zenith Firearms
