Article written by George K. Kontis in the gun magazine "FORESIGHT" issue of July-August 2005
Presentation by Georges K. Kontis
DPM - Greek Patent for Recoil Reduction
The Greek spirit is in elation! In a country where guns are not manufactured, and their legal use is particularly limited, naturally each related activity has a limited horizon of profitability. But it is in this country where a particularly effective system for recoil reduction was invented and is produced.
It is particularly encouraging that this system was invented, developed, and is produced and available from Greece. The inventor of the system, Mr. Dimitrios Mantas, is for sure a brilliant person. The gravity of a pistol's performance in combat led him to research the further reduction of recoil beyond what common systems offer. His invention also offers benefits for competitive and sporting use of pistols.
The basic concept is a system of three springs with a proportional guide rod, which replaces the standard factory recoil rod and spring set. In the advanced version, a magnet base is added for greater effectiveness.
MECHANICAL SYSTEM OF MULTIPLE SPRINGS
The system of multiple springs is composed of:
a) three springs, different both in cross-section and in power;
b) one guide rod;
c) one pin;
d) two covers, one on each end of the rod.
The three springs function in progressive collaboration with the aforementioned parts during the slide's cycling.
The results are that during its primary positioning, the system exerts the same amount of pressure as the standard factory spring; but in its final phase of coiling, the system exerts 80% more pressure than the factory spring. Consequently, the slide has enough pressure to cycle without jamming, but the felt recoil is extremely reduced.
The Magnetomechanical system is composed of a magnet with his base, and the mechanical system of multiple springs, which we already mentioned. The momentary delay in the slide caused by the presence of the magnet allows the maximum amount of gases to escape from the muzzle of the gun. Consequently, the slide moves back more softly, transmitting less kinetic energy to the body of the gun, and accordingly, to the user. Then, the mechanical system of multiple springs functions as a high quality suspension to absorb the remaining kinetic energy of the slide. The entire magnetomechanical system functions as an inertial mechanism for recoil reduction, faster cycling, and protection of the frame.
According to the constructor of the system, its installation in a gun offers the following advantages:
It considerably reduces the recoil.
It improves the firing speed.
It eliminates jams.
It offers better control and greater accuracy.
It considerably improves shot placement and grouping.
It protects the frame and the moving components from deterioration.
It does not require any modification of the gun.
The idea is guaranteed with a patent under the numbers of patent PCT/ GR 2004/000008 and WO 2004/073306 at the European and international levels.
The Magnetomechanical System is made for pistols with accessory rails and is available for the Glock 17/22, 19/23, 25, 31, 37 and 38. Soon it will also be available for models without rails, and distinctly for the Colt 1911-A1 and the Glock 21.
With the Mechanical System there is no need for rails, given that it replaces the factory recoil rod and spring set. It is already available for the Glock 17/22, 19/23, 20, 21, 25, 31, 34/35, 37 and 38; the Sig Sauer P226; the Walther P99; and the Zastava TZ-99. Soon it will be available for the Colt 1911-A1, the CZ P2000, the Glock 30, and the Sig Sauer P228 and P229.
During the discussions we had with Mr. Mantas, he was led to think about the research and production of systems for competitive use.
The metal components are manufactured using stainless steel W.-Nr.>/Grade 1.4301 (AISI 304) in metallurgic industry that performs with guarantee of quality ISO 9000. The springs are made from steel with a high carbon content, and coated with cadmium. This coat (which increases the cost) makes the springs more resistant to deterioration. All the sets for Glock models come with two springs, giving the user a choice of spring pressure. The golden spring is 15 pounds, and the silver spring is 16 pounds.
True, an experienced shooter does not have a problem with accuracy or shot placement, no matter how strong the recoil of the gun. But how many hours of training and how many thousands of rounds should someone spend to reach this level? The reduction of felt recoil, and by extension, recoil of the barrel, increases accuracy for the less experienced shooter. Moreover, the extreme stress of a combat situation is a major factor that influences a shooter's performance, and consequently, the use of his gun.
We tested the Magnetomechanical System, as it already had been installed in a Glock 17, and by this we convey our impressions. First of all, it is a system properly studied and carefully manufactured, so its application does not hamper the smooth functioning of the gun. The impression we collected during the test is particularly positive. The system offers less recoil of the barrel - as it appears also in the photographs - and has the advantage of a faster recovery for the secondary sight picture (proportionate to the faculty of the shooter). In our tests we did not confine ourselves to the classic double tap, but we also shot sequences of four or five shots. The results are shown in the photographs.
DPM Systems is located at Mikras Asias 37, Argiroupolis 16452, Tel/Fax 210-9617153, www.dpmsystems.com. We particularly thank Mr. Dimitrios Mantas for his help, and especially for the time that he invested so we could completely comprehend the details of the system.