Beretta PX4 Storm Sub-Compact

By - Last updated: Thursday, July 1, 2010 - Save & Share - 16 Comments

Editor’s Rating

Rating: 8.0/10.
Users’ Rating (Click a star to rate this gun.)
Rating: 6.4/10. From 274 votes.
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Summary: Mike Boyle’s review and rating of the Beretta PX4 Storm Sub-Compact pistol, Beretta’s MSRP and photos, and user ratings and comments. (Click here to see all of Boyle’s gun reviews.)

Editor’s Review

A few years back, Beretta introduced the revolutionary PX4 Storm, then took a wait-and-see approach to assess the full-size Storm’s reception in a very competitive market. (To read Dave Spaulding’s review of the full-size PX4 Storm, click here; to read his review of the PX4 Storm Compact, click here.) When it grew clear they had a winner on their hands, Beretta began breaking out smaller versions of the PX4 Storm, starting with the PX4 Storm Sub-Compact.  The “Baby Storm” shares many of the same qualities of the parent pistol, although there are a few major differences.

The Details
Beretta px4-storm-with-laser-sightMy sample PX4 Sub-Compact was chambered for the world standard 9mm and was set up with Beretta’s Type F trigger action.  Type F pistols are traditional double-action pistols with a long, relatively heavy stroke for the first shot and a short, light stroke for subsequent shots.  Once the pistol trips to single action, the hammer can be lowered to the frame by sweeping the slide mounted, ambidextrous safety lever down.  With the lever in the on-safe or down position, the pistol can’t be fired.

Some experts feel that in the event of a disarm, the on-safe pistol may buy just enough time for the legitimate user to employ other force options or regain control.  With practice, the safety can be snicked off and returned to the fire position as the gun is drawn from the holster and brought up on target.  It has been my observation, however, that most users carry this type of pistol with the safety in the fire mode.  Either way, Type F gives you a choice. Eventually, the PX4 Sub-Compact family will include all the Beretta trigger/safety combinations, including decocker only and double-action-only.

To build the PX4 Sub-Compact, Beretta mated a techno-polymer frame to a steel slide and barrel.  The 3″ long barrel is rendered from stainless steel and has a recessed crown to protect the muzzle from damage.  Its slide rides on a pair of steel rails that look extremely robust.  Fore and aft cocking serrations are milled into the slide, and a non-reflective black Bruriton coating is applied for protection against the elements.

External dimensions approximate those of my old Smith & Wesson M12 .38 Special snub.  Overall length measures 6.2″, and new subcompact stands 4.8″ tall.  Overall width is 1.4″.  The lightweight polymer frame keeps weight of the unloaded pistol down to 26.1 oz.

Special Features
So what makes the Baby Storm special?  A stumbling block for many contemporary pistols is grip circumference.  Consumers demand high capacity, but that comes at a price, which means a good-size handle.  This isn’t a problem for many shooters, but small-handed users are often challenged.

To solve this dilemma, Beretta has equipped the Storm Sub-Compact with two interchangeable backstraps. The smaller of the two is just the ticket for users with small hands.  With the aid of a flat screwdriver, you can easily swap out the backstraps to optimize hand fit.

The magazine release is reversible, and a larger copy is optional. A smaller, lower profile slide catch is also available.  Magazine capacity is 13 rounds, which gives the Storm an edge over like-size competitive pistols.  Higher capacity full size Storm magazines will also work in the PX4 Sub-Compact.

For sighting equipment, Beretta has gone with the ever popular three-dot combat pattern.  In my test pistol, the fixed sights shot to point of aim with most loads, and many users will find this setup entirely satisfactory. An accessory rail has been molded into the frame for the mounting of a small tactical light or laser.

A major deviation from the full size Storm is the way the barrel locks up. The original Storm uses a unique rotating barrel which has proven very accurate and reliable.  When I first picked up the Baby Storm and racked the slide, I was surprised to see the new pistol did not use the rotating barrel system.

A quick breakdown revealed a traditional Browning-style tilting barrel.  When I queried Beretta on this, a spokesman advised that they simply couldn’t incorporate the rotating barrel system of the original Storm into the shortened slide and frame of the subcompact version.  If my sample is any indicator, the PX4 Sub-Compact, with the more traditional locking system, won’t miss a beat.

Shots Fired
To get a handle on the PX4 Storm Sub-Compact’s combat potential, I gathered up the pistol and a representative sample of popular 9mm loads and set out to the range.  Ammunition included jacketed hollowpoints, ball and lead-free frangibles.  True to the Beretta tradition, the Baby Storm proved 100% reliable and I noted no malfunctions.

Ammo Avg. Muzzle Velocity
Group Size
(5 shots in 5 sec.
@ 7 yards)
Black Hills
124 gr JHP
1,102 fps 3.5″
125 gr +P JHP
1,209 fps 2.5″
Federal Hydra Shok
124 JHP
1,005 fps 2.5″
124 gr TMJ
929 fps 4.25″
Winchester Silvertip
147 gr JHP
1,015 fps 3.625″

Predictably, short barrels launch bullets at lower velocities than service-size pistols with longer tubes.  Would the abbreviated 3″ barrel of this subcompact pistol drop muzzle velocity and terminal performance down to .380 ACP levels?  In order to find out, I broke out my Oehler 35P chronograph and ran a few different 9mm loads over the screens.  When the smoke had cleared, muzzle velocities were indeed lower, but nothing to get excited about.  With the right load, you really aren’t giving up much at all.

CorBon’s 125 grain +P JHP posted the highest muzzle velocity, averaging 1,209 fps.  This is faster than most loads fired from a full-size service pistol.  Another solid performer: Black Hills’ 124 grain standard pressure JHP, which hit 1,102 fps.

With medium bore handguns such as the .38 Special and 9mm, I tend to favor the hotter +P and +P+ loads for self defense.  Beretta advises, however, that while the Storm can safely handle these high-pressure loads, extended use will accelerate wear.  I would simply practice with standard pressure ball and save the high-test for social work.

When testing service-size pistols, I like to assess accuracy potential by firing groups off a rest at a target set 25 yards distant.  Quite frankly, I don’t see the point of doing the same thing with small pistols and revolvers utilized as hideouts.  Instead, I evaluate combat accuracy potential in a way more consistent with the gun’s intended role.

I place a series of Visi-Color targets with 5″ circles 7 yards away.  On signal, I came up from a ready position and triggered off five shots in 5 seconds.  I fired from a standing, unsupported position utilizing a two-hand hold.

This little test did, in fact, bruise my ego–my first few attempts could be categorized as mediocre.  Five shot clusters weren’t all that bad, but I wasn’t able to place them all in the circle.  However, once I got familiar with point of aim, point of impact with the three-dot sight system, things began to go my way.  Average size of my five shot knots ran from 2.5″ inches to a little over 4″.  My best results were achieved with Federal 124 grain Hydra-Shok JHP and CorBon 125 grain JHP.

Rest assured the Storm Sub-Compact can get the job done at longer distance.  From a distance of 25 yards, I was able to reliably tag a steel headplate using both ball and lead-free frangible ammo. Sure, that short sighting plane does cause you to slow down, but I doubt intrinsic accuracy is all that much different than the full-size Storm.

Final Thoughts
The PX4 Sub-Compact offers a number of features not found in simarly sized pistols.  Gripping properties are very good, and the fact you can swap out the backstrap to better fit the hand is a big plus in my book.  I also like the fact that the PX4 Sub-Compact has a round trigger guard.  It may not appear to be a big deal, but the ability to quickly secure the concealed carry pistol in the holster with one hand is another big advantage.  I’m not exactly sold on the accessory rail for concealed carry, but for home defense, the ability to mount a laser or small illuminator is yet another desirable feature.

There really wasn’t much to take issue with on this particular pistol.  I tested it in early spring, and I found pushing the safety back up to the fire mode required more effort than Beretta’s M92.  Levers are somewhat flatter in profile to aid concealment, and when combined with cold fingers, the outcome is predictable.  Sweeping the lever down to decock, however, was not an issue.  In a discreet-carry double-action pistol, I would just carry it with the safety off.

Once again, it looks like Beretta has a winner on their hands.  If you’re shopping about for a small DA pistol, the Beretta PX4 is worth a hard look.

Mike Boyle served as a captain with the New Jersey Division of Fish & Wildlife Bureau of Law Enforcement and recently retired after 27 years of service. Mike remains active, teaching recruit, in-service and instructor level classes at the police academy. He’s also on the board of directors of the International Association of Law Enforcement Firearms Instructors.

The Specs

Caliber Capacity OAL BBL Height Width Weight
.9mm, .40 SW 13+1, 10+1 6.2″ 3″ 4.8″ 1.4″ 26.1 oz., unloaded

MSRP: $550

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16 thoughts on “Beretta PX4 Storm Sub-Compact

  1. Tony S

    Great review. This is my carry weapon. I will say it is very accurate (I am not the best shot). The 13 round magazine is a comfort. I love this gun. It fits so well in the hand. On the downside, sometimes it feels a little thick. I was at a gun show and someone asked if I was selling it (I was re-holstering as I had to surrender it at the door…I know, gun show, why right?) and I said no it is my carry gun. His reply was if you ever run out of ammo you can throw it. Point taken.

    It is nice knowing I have this on my hip. I am a pretty big guy and it conceals well.

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  2. Neal

    I bought this gun used and I must say… Nice Gun!
    I read a lot of review about the px4 storm subcompact 9mm, most were very favoritable. The finish was a little worn around the front top of the slide, but other than that, the gun seem to be in really gun comdition. I took it to the range and put 100 rounds through it of various ammo and not one single problem! Recoil wasn’t as bad as I would have thought it would be coming from a short barrel 9mm. It did however shoot a little low on the targets, but other than that the gun was a pleasure to shoot. I would recommend this to anyone looking for a subcompact 9mm.
    Great little gun!

    Note: Did I mention it holds 13 rounds!

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  3. Ashton

    I’ve carried a Beretta for over twenty years. As a professional law enforcement officer you bet your life on your weapon. I’ve got a 92F, 96FS, and retired with the PX4Storm (40 cal). I saw the PX4 subcompact and had to have one. I received one for Christmas, and WOW, good shooting pistol, easier to conceal than the full size storm and alot of fire power with 10 round mags(40cal). Beretta has done a excellent job in designing the baby. Great firearm! Retired LEO, former team leader of SRT and love to shoot this gun.

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  4. Tim

    I got my new Beretta PX4 storm sub compact and went right to shooting. I didn’t even hit the target. The sights were way off, they had me shooting low and to the left. I can’t believe they would send a gun out of the factory with the sights that far off. I think they do this on purpose so you will buy adjustable sights, well it worked, I ordered them today. If you don’t plan on buying new sights then don’t buy this gun!

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  5. GARY


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  6. cory harte

    Gary needs to talk to Beretta Service. My Sub-9mm clip came off of the take down lever, leaving the lever loose and moving around. The Maryland Service Department of Beretta had my pistol back in my hands in 2 weeks. I too thought the spring was broken but the clip had just come off. I hope that this is your problem because this is easily fixable.

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  7. Chuck Wilson

    Bought this gun 40 cal for my wife, but after range time I took it and bought her a 9mm. Both guns shoot flawlessly and eat anything you feed them. No notable difference in felt recoil or muffle flip. Both weapons are superb and are readily concealable and very accurate for short barrels. We have shot over 2500 rds thru each with no problems or failure to feed or eject. Typical Beretta quality! Highly recommend these guns!

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  8. Ray Richard

    Great little gun, lousy trigger. The DA trigger is long, hard and creepy. The SA pull is hard but crisp.
    The iron sights were way off and not really adjustable so they are superseded by a laser on the
    picatinny rail. Carried at half cock with the safety off and a tactic holster, the gun is really fast and
    accurate and can be shot as a SA. Bought an extra Flip-down magazine but it only held 5 rounds.
    Had to re-shape the follower and it now works great. Seems a little bush league to have to fix a new accessary from a top manufacturer. The weapon as it sits now is a perfect back-up and is my favorite piece.

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  9. Paul Calderon

    To Corey… My wife has the .40 cal version and has also run into the problem of the retaining spring not holding the take down lever, she’s worried about sending it in due to not knowing how much it would cost, could you give me a ball park number so I can get this problem fixed so she has her pistol at 100% again

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  10. jim

    Good reviews. Two other guns I think you would like to evaluate and which others would like your take on are 1) the Bersa Thunder Plus model which is a 15+1 shot .380 and 2) the Bersa Pro Ultra Compact 9mm. Any chance we will get to see these reviews any time soon?

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  11. cory

    Jim, i got mine fixed under warranty, it did not cost me anything not even shipping. i called beretta and they took care of everything. If out of warranty Beretta should be able to give you a ballpark price. Good luck.

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  12. PHill

    If beretta’s customer service after the sale is anything like the C S before the sale, buy a beretta and be prepared to be POed . I called baretta USA to get some info on the PX4 because there are some discrepancies on the web site. The person I spoke with was curt and condescending as if I was interrupting him from doing something important. I guess customer service isn’t important? When I told him I had called Sig a few days earlier with similar questions ( I’ve been trying to decide which gun to buy and had narrowed it down to Sig and Beretta) I was treated politely and with respect, he hung up on me! I would challenge the authors of these gun reviews to comment on the service after the sale as well as the performance of the gun. I guess I should thank the A H on the phone because he helped me decide which gun to buy. I’m getting the Sig.

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  13. John Marke

    I like the PX4 Storm Subcompact better than my Glock 26 or XDs .45 ACP. And those two are excellent pistols. It conceals about as well as the Glock 26 but has more firepower…13 rounds and one in the pipe. When you put a full size PX4 Storm magazine and magazine plastic extension it melts into your hand and now you have 17 rounds with one in the pipe…and a rock solid firing platform. Sights were balls on right out of the box. I put a Viridian Universal Subcompact Green Laser Sight with Tactical Light – Zombie C5L-Z on and sighted it in so the green laser dot was covered by the front sight. WOW. Deadly accurate in the 9 and 10 ring at 15 yards while I held it at chest level.

    I’m a big guy and can pocket carry the subcompact, but I usually do an inside the waistband carry with a Remora with sweat shield holster — the one that automatically turns on the laser when you draw the pistol. Sweet.

    I like being able to see the hammer…old school I guess. The double action is long enough to carry with a round in the chamber, hammer down and safety off. I also shoot revolvers so the long pull is no big deal for me.

    The single action is light and the reset is nice and short, and you have no doubt when you hit it. There is absolutely no kick to this weapon. It is a pleasure to shoot. Sexy Italian curves and everything looks and functions great. What’s not to like? By all means get the subcompact if you are undecided between the compact and full sized…the rotating barrel, to me, is no big deal. If you feel the need, you can also buy a 20 round PX4 Storm magazine…they all fit the subcompact.

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  14. Stevo

    I own a subcompact and love it probably going to get stealth safety levers but one thing why do they have to go to decocker? It would be a nice option to have it the same just lower profile. Also lowered the recoil by getting a DPM spring sweet look to it compliments the stainless crown . Awesome gun just wonder what they were thinking with those levers. I know I dont stand alone on them

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  15. Kevin

    Is it good for a recoil sensitive Person with weak hands and Is the slide easy to rack.I have strengh issues and if the trigger and the grip are confortable too it may b a good choice for me.Thanx very Much to all for your reply

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  16. Mark Gander

    I have both the compact in 9mm and recently purchased the subcompact chambered in 40. I love them both great shooters and they are made by Baretta they are great weapons. I truly trust both my life and my families carrying either. Have not had a single malfunction with either cant go wrong with any of the PX-4 models. Protect your second amendment rights always.

    Best Regards

    Mark Paris TN still land of the free

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