PSA ROCK 5.7 | A Handful Of 5.7×28

PSA 5.7 ROCK. All photographs by the creator until in any other case famous.

The 5.7×28 is an fascinating cartridge. Developed initially at NATO’s request as a attainable substitute for the 9mm Luger for PDWs and pistols, it underwent just a few modifications, and I keep in mind studying about it at the moment. I recollect questioning if it might make the transition to the civilian world, considering that it might be an incredible addition to a gun house owners’ arsenal. It’s firmly my perception that the 5.7×28 cartridge is right here to remain. I’ve come to this conclusion regardless of seeing it launched to us in a single pistol (the FN 5-seveN), after which virtually being placed on life assist because of gradual gross sales.

The issue wasn’t the cartridge – it was the truth that the one pistol in a position to chamber it for an extended whereas was that lone FN pistol, an costly ($1409 at the moment) proposition. Many shooters wished so as to add the 5.7 to their assortment, however couldn’t afford to till Ruger, Kel-Tec, Smith and Wesson, and some different producers added a 5.7×28 pistol to their line-ups.

Palmetto State Armory 5.7 ROCK, Optics Ready Pistol W/ Threaded Barrell & Holosun 407K Sight $699.99 

Stay Stock Worth Checker

Palmetto State Armory (PSA) jumped on that exact bandwagon by providing its inexpensive (beginning at $420. PSA web site) ROCK 5.7 on the market in Could of 2022. Now, many shooters can benefit from the punch of this centerfire .22. Coming in at lower than a 3rd of the worth of the FN 5-seveN, this cost-effective PSA gun is being snapped up by savvy shooters wanting a hard-hitting pistol that makes little-bitty, very-close-together holes in a goal with out a lot felt recoil. Varmints particularly fall into the bailiwick of this zippy little spherical, though that wasn’t its authentic supposed goal. Let’s take a fast take a look at the 5.7×28 cartridge first, then we’ll look at the ROCK 5.7 up shut that PSA kindly despatched for evaluation.

5.7×28 Backstory

Developed by Fabrique Nationale and launched in 1990 on the request of NATO as a attainable substitute for the 9mm, the SS90 (because it was referred to) featured a 23-grain, plastic-core bullet at 2800 fps when fired from FN’s P90 PDW. When fired from that weapon, the cartridge may defeat a NATO CRISAT vest or a Degree IIIA Kevlar vest at a variety of 200 meters. Three years later, the SS90 was changed by the SS190 with its 31-grain bullet at 2350 fps. It additionally featured a barely shorter case to operate in a pistol extra simply. After just a few extra variations and additional growth of the 5.7×28 cartridge, the FN 5-seveN pistol went into manufacturing in 1998.

I received’t go into the navy/NATO evaluations of the cartridge… suffice it to say it underwent a sequence of exams in 2002 and 2003, alongside the H&Okay-developed 4.6×30 cartridge. These exams have been terminated because of a weird flip of occasions, as H&Okay cried ‘foul!’ and testing was suspended.

For sure, the venerable 9mm was not changed, however the civilian world gained a fun-to-shoot little spherical that excels at penetration, velocity, and lack of recoil. That leads us to the gun-of-the-hour, the PSA 5.7 ROCK.


Introduced in January of 2022 and obtainable in Could of that 12 months, the PSA 5.7 ROCK has been a constant vendor for them. Proudly owning a function set much like that of a costlier pistol, the PSA 5.7 ROCK appears, feels and shoots prefer it ought to price a few Benjamins greater than it does. Finally depend, I noticed 71… yup, 71… totally different fashions of PSA 5.7 ROCKs obtainable on PSA’s web site. That counts all 5.7s… these each out and in of inventory, nevertheless it provides you an concept of how fashionable the spherical and the gun are. In the event that they weren’t promoting them, they wouldn’t make them. Can’t idiot me! The weapons promote properly as a result of the function set outweighs the worth tag.

Talking of options, let’s check out the specs…


  • Mannequin: PSA 5.7 ROCK
  • Caliber: 5.7x28mm
  • Capability: 23+1
  • Weight with Empty Magazine: 25 oz
  • Barrel Materials: Carbon Metal With QPQ End; Fluted
  • Barrel Size: 5.2″
  • Twist Charge: 1/9″
  • Thread Pitch: 1/2×28 TPI
  • Entrance Sight: Co-Witness Sight, suppressor peak, Glock-compatible
  • Rear Sight: Co-Witness Sight, suppressor peak, Glock-compatible
  • Slide Materials: 416 Stainless Metal with Sniper Inexperienced Cerakote End
  • Motion: Delayed Blowback Striker-fired; single-action
  • Magazine Catch: Reversible
  • Security: Set off & Striker
  • Accent Rail: Picatinny
  • Coloration: Sniper Inexperienced
  • MSRP: $699.99 with Holosun HS407K X2 pink dot


Now we have the measurements, weights, and so forth. listed above. Let’s take a extra subjective take a look at this pistol… what do I like about it? As an alternative of doing professionals and cons, I’ll write about what impressed me, and one factor that didn’t impress me. One draw back that I noticed with this pistol didn’t have something to do with the pistol, however with the price of ammo. Be able to spend round $30 for a 50-round field of FMJ cartridges. Count on to pay extra for tender factors or different increasing rounds. You should buy ammo in bulk, nevertheless it nonetheless ain’t low-cost. (The reloader in me discovered that the spherical took small rifle primers and about 6 – 10 grains of powder. Reloading is an choice).

Really feel.

This can be a 5.2-inch-barreled, full-size pistol. It suits my hand very properly. I obtained this and PSA’s Dagger Compact 9mm for evaluation. After dealing with the Dagger, I picked up the ROCK and my hand mentioned “Ahhh…”. Effectively, possibly not actually, however there is extra room within the grip. Granted, the Dagger is a compact pistol and as such feels higher than its “G”-word competitor in my hand. However, the full-size ROCK has an extended grip and could be very snug to carry. My good friend Ed, a former deputy who frequently carries a Walther PPQ, actually favored the bigger grip body of the ROCK over that of the Dagger. He’s tall, with giant arms. It’s a subjective name.

Pink Dot.

This mannequin comes with the Holosun HS407K X2 pink dot sight. This 6-MOA sight is, properly, tiny. It’s shorter and narrower than many different dot sights I’ve used over time. With its auto-on and –off function, you’ll have 50k or so hours of battery life. Holosun makes great things.

Holosun HS407K X2 red dot sight
Holosun HS407K X2 pink dot sight
Grip Texture.

I observed first with the Dagger that the grip texturing could be very efficient. I like a tough grip texture — I’m useful with a soldering iron within the stippling division — however this grip works very properly. If you choose the gun up, there isn’t a “grabby” really feel to the grip. It’s solely whenever you crank your grip down that you just really feel the stickiness. Put the gun in your hand, grip it tight, and attempt to transfer it round along with your different hand. I can’t get it to maneuver a lot in any respect. I expertise the identical feeling with my Springfield Armory Hellcst RDP… SA makes use of the same texturing that feels nearly easy till you grip laborious. The texturing right here could be straightforward on garments.

The grip’ texturing. It really works!

The ROCK makes use of a striker and set off security. The striker is blocked until the set off is pulled, and the set off is hinged like that on an S&W M&P 2.0. There isn’t any heart blade. I like this method – it really works properly, doesn’t have an effect on the set off pull, and doesn’t pinch my finger like some bladed triggers do.


The ROCK, just like the Dagger Compact, makes use of suppressor-height, co-witnessing sights which might be Glock suitable. They line up with the Holosun HS407K X2 pink dot that got here with the gun (after a little bit of zeroing… it wanted adjusting however was no large deal). The Holosun is mounted instantly on the gun, no adapter plate is required, however a few plates are included if it’s good to set up one other sort of pink dot. The ROCK lets you instantly mount any Defend footprint optic, excluding the Leupold Delta Level Professional.


You can load all however three from a field of fifty 5.7×28 cartridges within the two included metal magazines, plus one within the chamber… journal capability is 23 rounds. Not too shabby! They load like .223 AR mags load – push the cartridge down till it clicks into place … don’t attempt to slide it in from the entrance. That is smart because it’s mainly a tiny bottleneck rifle cartridge being loaded. They do get slightly laborious to press down after you’ve loaded just a few, so be ready to push with some power.

Two 23-round magazines include the gun.

In regards to the magazines, PSA’s web site has this discover:

“Whereas this journal will slot in a Ruger 5.7 magazine properly, we can not assure that it’ll operate in a Ruger 5.7 Pistol

*Resulting from geometry variations, the 5.7 Rock 23 spherical *journal will slot in a Ruger 5.7 Pistol and our 5.7 Rock pistol, nevertheless, the operate can’t be assured.
A 20-round Ruger 5.7 journal will NOT work in a 5.7 Rock.”

So now you realize.


The ROCK and the Dagger Compact have been each shipped in soft-side, FDE zipper circumstances with holders for each magazines and the lock. A velcro strap for the gun’s grip rounds out the bundle. This case is a really good “further” that was not anticipated.

The PSA tender case
The case – what’s inside
Threaded Barrel. 

Add a suppressor simply by way of the 1/2×28 TPI threaded barrel. Don’t lose the rubber gasket below the thread protector – you’ll want that.

Set off.

The one detrimental remark I’ve about this specific pistol issues the set off. I measured it at seven and a half kilos. It had a couple of half-inch of take-up. That wasn’t the difficulty. The set off pull itself was very laborious – after take-up, you hit the “wall” and it takes quite a lot of strain to journey the sear. I pulled the sights off course a few instances making an attempt to deal with the strain required to fireside the gun. I’d hope that, after just a few hundred rounds, the set off would easy itself out however as it’s now, it certain took some concentrated effort to maintain the sights or the dot on the goal whereas urgent it.

That truthfully is the one remotely detrimental side I observed about this gun. Different shooters validated my opinion on the robust set off. A number of different evaluations I learn on-line praised the set off on their pattern, so hopefully, the one I acquired was a one-off.

Takedown lever
The takedown lever. The drill is totally different for this gun.
Slide engraving
Little question as to caliber!

Discipline-Stripping The ROCK

The take-down drill is a bit totally different than your typical Glock-style process. It’s extra just like the takedown of a few .22 LR pistols I’ve dealt with.

taken down
Discipline-stripped. Don’t lose the gasket!

First, pull the journal and ensure the chamber’s empty. Then, take away the magazine and pull the slide takedown lever down. Grasp and pull the slide to the rear about 1/2″. After a set off pull, transfer the slide ahead not fairly an inch, and raise it off the body rails. Don’t try to slip it off the entrance of the body… that’s not going to occur.  Simply raise it off the rails.

To reverse, place the slide again over the body, about an inch ahead of the locked place. Press it down and work the slide to the rear. That ought to do it. In the event you get caught go to the PSA 5.7 ROCK owner’s manual. Go to web page 17.

The important thing to with the ability to take away the barrel for cleansing lies within the thread protector’s rubber gasket. I attempted pulling the barrel out at first and was unsuccessful till my good friend Ed tried it and noticed, then eliminated the gasket. I hadn’t seen it, however he did. As soon as the gasket was off, the barrel got here proper out. Hold on to that little rubber circle!

How’s It Shoot?

Shooting the ROCK
On the bench

I purchased a few totally different manufacturers of 5.7 ammo… not one thing I say evenly at its present price … and headed to my yard vary. As I mentioned above, I had reviewed the Ruger 5.7 earlier than, so I had some concept of what to anticipate by way of recoil, flash, and noise. Not a lot of the primary, extra of the final two. This gun was no totally different. When you think about that the 9mm operates at a max strain of 38,500 psi and examine it to the 5.7×28’s greater than 50,000 psi, you’ll know whenever you contact one off. Keep in mind that the unique navy goal of growing the 5.7 was to defeat physique armor at a distance. So, it’s sure to draw consideration whenever you pull the set off.

Shooting the ROCK again
Our oldest son tries his hand.

One of many two manufacturers of ammo I purchased was the FN-manufactured 40-grain FMJ (FN GUNR, #SS201 goal ammo). The primary two targets are the FN load and the third, black, goal is the Federal American Eagle 40-grain FMJ. Targets have been set at 25 yards. Right here’s what occurred…

Target 1
The primary goal
target 2
One other goal
Federal American Eagle FMJ 4-gr. This one may be value trying into…

It took some time to find that the pink dot wasn’t fairly zeroed, so we switched to irons. The tall sights have been straightforward to amass, however the outcomes have been not so good as they may have been if we had simply caught with the irons to start with. I lastly acquired the dot zeroed to co-witness with the irons, after our capturing session. The gun popped each clay pigeon I put the dot on – it’s correct, regardless of the set off. Until you’re looking varmints with this gun, this FMJ ammo is definitely OK for follow.


In case you are trying so as to add a singular firearm to your gun secure and need that gun to place bullets out of its muzzle at very nice pace, you then may wish to take a look at the PSA 5.7 ROCK. The ROCK is constructed to a excessive commonplace, feels good within the hand, and is correct and dependable. I actually like capturing it — the shortage of recoil makes up for the blast and flash. If ammo was a bit cheaper, I may packing this factor round at dwelling for woods walks, and so forth. Put one in your hand and provides it a attempt – you’ll be glad you probably did!

About Mike Hardesty

With expertise spanning over 45 years, Mike Hardesty has lengthy loved capturing and reloading. An inveterate reloader, he casts bullets and reloads for a various array of firearms, every dealt with with long-practiced precision. Residing in rural Indiana, his homestead boasts a private 100-yard vary the place he shares his love for weapons to his 4 sons, their wives, and eleven grandchildren. As a acknowledged creator, his writings have been featured in notable platforms like Sniper Nation, Bear Creek Arsenal Weblog, Pew Pew Tactical, TTAG, Dillon Precision’s Blue Press, and Gun Made, revealing his ongoing ardour for firearms on the age of 72.

Mike Hardesty




PSA ROCK 5.7 | A Handful Of 5.7×28 is written by Mike Hardesty for

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