Beretta PX4 Storm (Umarex)


Beretta PX4 Storm (.45 ACP)

 Umarex, Beretta PX4 Storm
Replica Of:
 Beretta PX4 Storm (.45 ACP)
Made In:
 177, lead pellets and steel BBs, 16-shot
rotary magazine

Air Source:
 12 g CO
2 Powerlet
Recommended Pellet or BB:
 JSB Match Diabolo (7.4 gr)
Weight (lb)/Length (in):
 1.6, 7.5
Body Material/Finish/Grips:
 plastic/metal (slide), black, plastic

Barrel Length (in)/Material/Rifled:
 4.5, steel, yes
Trigger Action:

Trigger Pull (lbs)/Adjustable:
 9.6 (DA), 5.8 (SA), no
Sights (front/rear):
 fixed, fixed

Velocity (fps):
Sound Level (dB):  99
Thickness of Pellet Holder (in):  0.285
Manufactured Dates:
 2007 - present
 98%, yes, yes (backer card)
Serial Number:

Comments:  The Beretta PX4 Storm is made in Japan for Umarex. It is an excellent replica of the Beretta PX4 Storm right down to the polymer body and metal slide. This pistol borrows design elements from Umarex's Walther CP99 Compact (safety lever) and the Desert Eagle (pseudo single-action). The blow-back action is very strong, requiring a good grip to keep the pistol on target. Like the Desert Eagle, the slide on the PX4 Storm has no lock and does not lock back when the magazine is empty. The pistol can be fired double-action for the first shot with subsequent shots being pseudo single-action; pulling the trigger rotates the pellet holder and then releases the hammer (similar to the Desert Eagle). This action makes the trigger unpredictable, with a jerky first stage and a mushy second stage. There is a tendency for pellets to get jarred loose in the magazine causing them to jam when fired (a problem shared with the Anics A-3000). This problem can be minimized by using pellets with wide skirts and heads such as JSB Match Diabolo and RWS Hobby. The PX4 Storm can also use steel BBs, although I did not test this pistol with them. The magazine is an unusual design incorporating an 8-shot rotary pellet holder at each end. When one end is empty, the magazine is removed, inverted, and then reinserted for eight more shots. The Beretta PX4 Storm is a decent action plinker when used with the proper pellets.

Pyramyd Air Report on the Beretta PX4: Part 1, Part 2, Part 3
Owner's Manual for Beretta PX4 Storm (.pdf)

Measurements were made on 11/05/07 at a temperature of 71 F and 14' elevation. A ten shot string was fired from a bench rest at 15' using JSB Match Diabolo pellets (7.4 gr). The highest velocity measured was 396 fps, the lowest was 363 fps (average of the 10-shot string was 378 fps). A six shot string fired with open sights grouped at 0.44". Click the thumbnail below to see a larger image. Click here for a description of the measurement methods.


Left Profile2: The slide lock lever and slide-mounted safety levers are non-functioning props.

The non-adjustable combat style sights have white dots for quick target acquisition.

Right Profile: The safety lever is identical to the one on the Walther CP99 Compact. It is difficult to release the safety with one hand. When the safety is engaged, it decocks the hammer.

Front View: The slide is made of metal and blows back when the gun is fired. The magazine release button is just behind the trigger on the left side.

Right Side Markings:


Left Side Markings:

Loading Pellets: The magazine is made from plastic and holds 8 lead pellets or steel BBs in each holder on both ends of the magazine. When 8 shots have been fired, the magazine can be removed, flipped over, and reinserted for 8 more shots. The magazine release button is just behind the trigger on the left side of the pistol.

Magnets hold BBs in the magazine. Lead pellets should have wide skirts to avoid being dislodged during shooting, leading to jams. The plastic pellet holders are slightly deeper than the metal magazines used in most Umarex CO
2 pistols.


Loading CO2: The CO2 cylinder piercing mechanism is the familiar and reliable Umarex design used on most of the Walther CO2 pistols. You get about 40 good shots from a CO2 cylinder. The blow-back action uses up some of the gas, which reduces the number of shots per cylinder.

For some reason, Umarex did not design a cover for the magazine well, which leaves the end of the magazine exposed.



Owner's Manual for Beretta PX4 Storm (.pdf)



 Copyright 2011