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Smart Parts

Product testing performed with DraXxus Paintballs

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03 Shocker
By Bill Mills - May 2004
Photos By Dawn Mills

Page1    Page2    Chrono Data    Target Data   Shoot-Down Test

Continued from Page1

Traveling further back along the stock receiver one finds a view window, which exposes a portion of the bolt assembly.  This feature allows aftermarket or upgrade bolt assemblies to be identified by color or other markings.  

Further back along the receiver is the rear cap.  This is the piece which holds the entire bolt assembly in place, and it consists not only of the rear cap of the receiver, but also as a central bolt guide which seals off portions of the bolt’s interior.  Using a hex wrench, the rear cap can be easily removed (only when the Shocker 03 is completely de-gassed) and extracted.  

Pulling the bolt guide out by the rear cap will likely leave the remaining valve components  inside the receiver due to friction.  Pushing from the front with a finger (if one is blessed with a long, thin enough finger, like E.T.) or a something of a soft, non-marring material like a wooden dowel will allow for removal of the remaining components.  The valve bolt assembly consists of the rearcap/bolt guide, the bolt, the bolt sleeve, and the firing chamber or  chamber (the reservoir that fills with air for each shot.)  

After removal for cleaning or inspection, the seals on the valve/bolt assembly should be lubricated with Smart Parts’ Included Shocker Lubricating Grease.  

Re-assembly follows a simple pattern.  With the front of the bolt facing to the left, the bolt sleeve is held with its indented half on the right.  The bolt slides into the bolt sleeve from left to right.  

The bolt can then be slid onto the bolt guide, also from left to right.  

The firing chamber then slides over the front of the bolt from the left, with the double o-ring end on the left.  

The full assembly can then be slid back into the Shocker 03 body, and screwed into place.  

It is important to note that the original bolt, manufactured of white Delrin like material was replaced in later models with an aluminum bolt.  The aluminum bolt, and a replacement power switch button are available as a factory update from Smart Parts for owners of Shocker 03s with serial numbers ranging from 0000 to 3900.  This is a free update that can be obtained by filling out a form on the Smart Parts web site.

Aside from materials, the newer aluminum bolt is nearly identical to the earlier model.  The exception is that on the front of the bolt’s sail has a bumper in place to cushion its impact against the rear of the firing chamber.

Below the backplate, to the left and the right are what Smart Parts calls Solenoid Inserts.  These are a pair of aluminum dowels that are screwed into place inside internal gas paths in the receiver.  They act as non-moving pneumatic spools do divert airflow between different manifold ports along the paths.  In short – they are a method of plumbing.  

Beneath the receiver on the back of the Shocker’s grip frame is the power button.  This is a clear push-button which activates a momentary switch on the solenoid mounted circuit board.  Also on the same circuit board is a very small, yet very bright blue light emitting diode, or LED.  The push-button is made from clear plastic, which transmits the light from the LED.  This plastic piece is the other part in the factory upgrade for owners of earlier production Shocker 03 paintguns.  The new piece is more robust.  A pair of tiny magnets fit into arms on the plastic button and pull it against a steel dowel pin, instead of using spring or other return mechanism.

When the Shocker is off, pressing and holding the button for approximately three seconds is rewarded by a chirping sound to indicate that the Shocker is on.  At this point the LED will blink in double pulses about once per second – the Shocker is live and will fire when the trigger is pulled.  A short press on the button, and the Shocker will activate the Vision circuitry.  At this point, after the first shot fired, it will not fire unless it detects a paintball in place ready to be chambered.  The LED will blink rapidly if a ball is in place, and slowly if the breech is empty.  Pressing the button again, will de-activate Vision mode.  In either Vision or non-Vision modes, pressing and holding the button for about three seconds will turn the Shocker 03 off.

Two buttons on the inside of the grip frame are used to adjust the timing values in the Shocker’s internal memory.  Accessing the buttons requires using a Phillips screwdriver to remove two screws and opening the left hand side of the wraparound grip.  Whether adjusting the dwell time or the recharge time, the top button increasing the timing value, and the lower button decreases the timing value.  

Dwell, or the amount of time that the solenoid valve is energized for each shot is adjusted simply by pressing the adjuster buttons with the power on.  Each time one of the buttons is pressed, the circuit’s speaker will chirp indicating that the timing has been increased or decreased by 0.25 milliseconds.  The dwell is adjustable between 3 and 14 milliseconds, the circuit board will chirp repeatedly when the minimum value is reached.  Setting to a specific value involves stepping it down to the minimum, and then counting up to the desired value.  

Adjusting the recharge time changes the amount of time the Shocker will wait after firing a shot before firing the next shot.  The recharge value is important in that without a Vision system in place, it will be what determines that the bolt is open long enough for a ball to fall into place, in addition to making sure the bolt is back long enough for the air reservoir to recharge for the next shot to achieve full velocity.  The recharge time is also adjusted with the same two buttons, but done while the trigger is pulled and being held.  The recharge is adjustable over a much wider range thirty to seventy milliseconds, in one millisecond intervals. 

While adjusting dwell and recharge time may seem a little tricky it is fortunately not necessary for normal use of the Shocker 03.  Adjusting the timing comes in to play for fine tuning when attempting to maximize the number of shots available per tank fill, or when adjusting for optimal operation after changing to a different bolt/valve kit.  The combination of the Dwell and Recharge times results in the total time needed for each shot, which directly sets the Shocker’s maximum rate of fire.

The Shocker 03 used for review was bundled from the factory with a Max Flo compressed air system, with a 68 cubic inch compressed air tank.  Field testing was performed with a HALO B loader, as recommended in the Shocker 03 manual.  The stock barrel was used, as well as a Freak with All American tip, using the .687” insert, which matched, by blow testing the DraXxus Hellfire paint used for testing.

On the field at Hurricane Paintball Park in Palm Bay, Florida, the Shocker 03 was trouble free, fast firing, quiet and accurate.  Its lightweight and compact form factor made it easy to use and highly mobile in the woods or on the speedball field.  While some paintgun manufacturers have moved toward adding more interface features, more modes of fire, and more of those types of bells and whistles, the semi-only operation and one button control of the Shocker 03 made it easy for players who had never seen it before to try it out without needing to spend time reading through a manual.  Luxury cars may offer features like DVD players, lots of knobs, dials and GPS navigation, but like a race-car with little more than a tachometer and oil pressure gauge, the controls of the Shocker 03 offered functional simplicity and ease of use on the field.  Shot groupings were tight, and the short, light trigger pull made high rates of fire easy to achieve.  Through game use, the Vision mode was activated, and ball breakage was not a problem.

Off the field, on the test stand, the Shocker 03 was tested for velocity consistency and target groupings under a variety of conditions.

The first test performed was velocity consistency.  Three strings of 10 shots each were fired at one-second intervals under microprocessor control.  This was done with both the stock All American barrel, and a Smart Parts Freak barrel with All American front, and a .687” insert which had been selected to match the DraXxus Hellfire paint.  The stock barrel produced a standard deviation value of 4.2, while the matched Freak was slightly more consistent at 3.4.  Statistically, 95% of the shots fell within +/- 2.0 fps of the average for the stock, and +/- 1.0 for the size matched Freak.

Target groupings were fired at 75 feet, again with both the stock and size matched Freak.  Groupings of ten shots were fired with one-second intervals between shots, to allow comparison of grouping sizes.  Predictably, the matched bore size yielded a tighter grouping.

An additional velocity consistency comparison was made between slow and rapid firing to find fluctuations caused by valve and regulator recharge rates.  With the size matched Freak Barrel, three strings of ten shots were fired at one second intervals followed by three groups of 10 shots fired at a rate of fourteen balls per second.  During the rapid fire strings the Shocker only fired 26 shots over the 30 trigger pulls, indicating that the Vision system had prevented ball breaks from paint that had not fully loaded into the breech.  Comparing the data from the six strings, the low speed firing did provide a slightly more consistent velocity, with a standard deviation of 3.4 compared to 4.6.  However the average velocity of the low rate of fire string was 299.2 feet per second, compared to 299.4 for the high rate of fire string, a very slight increase, indicating that shoot down under typical rapid fire is not a problem for the 03 Shocker running a Max Flo air system.

The Shocker 03 combines the accuracy, quiet operation and ability to handle brittle paint that were hallmarks of the original Shocker with a compact, lightweight form factor and high rate of fire.  It is streamlined not only in appearance, but also in operation giving tournament legal semi-automatic mode and a simple to use control interface.  It is the Shocker reborn.


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