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540 ft/sec…7 joules (5.16 ft-lbs)
.177 Air Arms S400 MPR Poplar Stock
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.177 Air Arms S400 MPR Poplar Stock

To fill the gun, unscrew the air reservoir and attach it to the 200-bar DIN hole of a scuba tank or hand pump. The end of the reservoir has a manometer (air pressure gauge), so you'll always know how much air is left in the tank. The correct air pressure for the MPR is 200 bar (2,900 psi).

If you enjoy winning 10-meter matches, the Air Arms S400 MPR Precision air rifle can help you achieve your goals! 80% of the value for 40% of the price!
  • LifeTime Limited Warranty
  • Precharged pneumatic (PCP)
  • Single-shot
  • Bolt-action (not adjustable from RH side of gun)
  • 7 joules (5.15 ft-lbs.)
  • Highly adjustable match trigger (first-stage length, second-stage pull, move up/down, forward/back)
  • 11mm dovetail
  • Adjustable cheekpiece
  • Adjustable buttpad
  • 12-groove, nickel-plated Lothar Walther barrel
  • Globe front sight accepts inserts
  • Fully adjustable rear diopter sight
  • Removable reservoir with built-in gauge (manometer)
  • Lightweight, ambidextrous poplar stock
  • Loudness: 2-Low-Medium
  • Weight: 6.80 lbs
  • Barrel Length: 19.25"
  • Overall Length: 41.75"
  • Capacity: 1 round(s)
  • Barrel: Rifled
As you can see by the set-up in the picture below, I tested the MPR using a sliding gun vise to absorb any recoil and a solenoid to pull the trigger so that the tests were untouched by human hands. The pellets that were used were 5.2 grain RWS Hyper Max, 7.0 grain RWS Diabolo Basics, 8.4 grain JSB Diabolo Exacts, 10.6 grain Crosman Premier Ultra Magnum Heavies, 16.0 grain EunJins. Of the five pellet weights, the 5.2 RWS, 7.0 RWS and the 8.4 JSB Exacts gave the smallest groups of 3mm each at 640, 559 and 538 feet per second with 5, 5 and 5 foot-pounds of energy respectively at a distance of 10 meters with a starting air pressure of 2900 psi for each 6-shot sequence. The Premiers and EunJins of course were less accurate because they were too heavy. Accuracy is the operative word here! If you want a deadly accurate field target rifle, the MPR will have you leaving your competition in your dust! Also, because each air gun has its own personality, your results may vary... Dirt E. Harry

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