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It has been almost one year since I first
reviewed the DPM Systems multi-spring
mechanical recoil system for the Glock pistol. Since
then, I have met the owner of DPM Systems, Mr. Dimitrios
Mantas, and looked over his products more in depth. He now
has systems available for most popular semi-auto pistols.
Basically, the mechanical recoil system consists of a stainless
guide rod, in which are contained two captive springs, and
another spring which slides over the rod. This third spring can
be switched to more or less powerful springs to best suit the
shooter’s choice of ammunition. The DPM unit replaces the
pistol’s stock spring and guide rod, and can be installed in
just a few seconds, without any tools.
The principle behind the three spring system is
that is operates more smoothly than the stock unit, and provides
a progressive increase of spring tension as the slide moves
rearward in recoil, effectively cushioning recoil, and
protecting the weapon from battering the slide into the frame as
it ends its rearward travel. It works, and works well.
The latest DPM Systems unit that I have been
testing is for the Smith & Wesson
M&P .40 S&W and 9mm pistol. Having an accessory
rail at the bottom of the frame just under the slide, the
M&P can use the DPM "Magnetomechanical" system.
This system is identical to the mechanical system internally,
but adds a magnetic recoil dampener to the accessory rail of the
weapon, which by magnetic action, slightly delays the opening of
the slide upon firing, further cushioning recoil. I have not the
scientific equipment nor the ability to prove the extent at
which this works, but it is easily added to the accessory rail
without tools, and still allows the use of a light or other
accessory as the user desires.
DPM claims that their spring/rod system offers
better control of the weapon and aids in accuracy, improves
firing speed, and increases weapon reliability. I found
these claims to be true in tests on a Glock 19 a few
months ago. I was anxious to try the DPM System on the Smith
& Wesson M&P. With its superior ergonomics to the Glock,
I suspected a very pleasant shooting experience using the
M&P with the DPM System installed. As can be clearly seen in
the "before and after" videos, once again, the DPM
spring system works very well. I tried it with and without the
magnetic dampener, and could see little if any difference on the
9mm pistol. Perhaps on a heavy kicker, such as a 10mm or .Plus P
.45 ACP, the magnetic dampener will make a big difference.
However, I did realize a noted difference in the feel, shooting
speed, and control of the 9mm M&P with the DPM unit
installed. While the 9mm is not a hard kicker, every little bit
of help is appreciated in a defensive weapon, and the
improvement provided by the DPM spring unit is a definite aid to
fast, accurate shooting. In both the before and after
videos, I was shooting the same ammo; Cor-Bon 9mm Plus P
147 grain flatpoint ball. This is no powder puff load. It is
quality high performance ammunition, and the DPM unit offered a
substantial improvement in weapon control and speed over the
stock spring unit. Note the lack of muzzle rise in the video
after the DPM unit is installed. The video really tells the
story much better than I can with words. In addition to aiding
the shooter in accurate rapid fire shooting, the DPM System also
cushions the slide to frame battering which occurs as the slide
reaches its rearward travel, which should protect both the frame
and slide from battering.
In addition to the unit for the S&W M&P
pistol, DPM offers their spring system for most popular combat
pistols, including the Glock, SIG, CZ, Beretta, and Walther
models, with units for the 1911 coming soon.
The DPM Systems recoil reduction spring unit is
made of quality materials, is built to last, and I highly
recommend it. It gives the shooter a definite edge in both speed
and control.
Check them out online at: www.dpmsystems.com.
To order a unit for your pistol, if you reside
in the United States, go to: www.glockuser.com.
Jeff Quinn
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 "Before"
video: the S&W M&P in action without the DPM Systems
Magnetomechanical unit.
 "After"
video: adding the DPM unit substantially decreases felt recoil
and muzzle rise, making quick follow-up shots much more
accurate.
Click pictures for a larger version.
DPM Systems' multi-spring mechanical unit replaces the
stock recoil spring & guide rod.
The Magnetomechanical unit attaches to the pistol's
accessory rail easily and without tools, while maintaining the
ability to install an accessory under the unit.
Stock captive spring (left), DPM rod with springs
(right), and Magnetomechanical unit (top).
Mr. Dimitrios Mantas, the man behind DPM Systems.
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