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Mossberg Shockwave

My friend bought one of these and dropped it off yesterday so I could try it out. If you have been living under a rock and hadn’t heard of this shotgun iw ill let the maker blurb get you up to speed-

A Compact, Pistol-Grip Self-Defense Shotgun That’s Also NFA-Exempt. Mossberg’s 590 Shockwave pump action sports a 14″ barrel and a unique “bird’s head” pistol grip instead of a full buttstock, making it compact and highly maneuverable – ideal for a personal defense shotgun.

If you have heard of this you likely heard about the Father and Son combo that had a little tussle with another unhinged fellow resulting in a shotgun blast to the face.

The Shockwave doesn’t have a stock so aiming it like a shotgun is pretty tricky. I found that it was best to kind of shoot from a point shooting type of stance. The target was 15 yards away.

This is from one round of buck from the 2 inch shells.

The below target is from another round of buck and two rounds of slug.

Far upper left and upper right holes are from the wad.

Shooting from around 25 yards resulted in less than useful accuracy and patterning. Combined with in exact aiming, makes this shotgun a up close and personal affair. Which is fine because that is what it is meant for.

The above 2 inch shells are a god send for this gun, I have shot pistol gripped shotguns in the past using normal loads and it is not fun at all unless you are the kind of person that likes sprained wrists. These come in buck, slugs and regular shot. A drop in piece goes into the shotgun to allow smooth reliable cycling of the shorter ammo. Without it the gun will chamber and cycle up to 3 inch shells. I can’t imagine what it would feel like firing a 3inch 00 load or slug with this thing and have no desire to find out.

Optic Of The Week PVS-24

A few years ago I was with my friends as we tested one of the PVS24s for possible use by the police sniper team. I ran across the pictures I took this morning. You can see it above compared to my PVS14.

I was surprised to find out that I prefer the clarity of my PVS14.

The 24 clips on in front of the regular day optic. It does not change the weapon’s zero.

It is long and there are other options for front mounting night vision that are smaller. Including FLIR. We thought this would be amazing but it was pretty meh. It was hard to see a human standing in plain sight at 100 yards and nearly impossible when one squatted down into waist high grass. A Surefire light with IR head helped a bit, but not much.

STRIBOG SP9A1

Arfcom User N_Parker posted a great review on the STRIBOG SP9A1

So I took the plunge into the unknown and purchased a Stribog as soon as they became available. Pending a range report, I am really liking this pistol but I do have a couple of concerns. I am hoping these take-off in popularity making it an attractive platform for aftermarket manufacturers. More specifically the availability of 922r parts should the Stribog prove itself worthy as an SBR candidate.

I contacted Eagle Imports and queried the future availability of stocks and 922r parts and they replied as follows:
“No, we will not be selling stocks or any 922R compliant parts. We will only be selling the basic parts, such as the magazines and adapter”.

Disassembly: Push pins are a little tight, more about that below. Rear cap has a very nice snug fit to the receiver and needs just a light tap with a rubber mallet for removal. Buffer pads at the rear tend to bind a little in the housing so the bolt assembly will not slide out unless you pull on the buffer while pulling back on the charging handle at the same time. I assume a little lube on the perimeter of the buffer pads or at the rear of the housing will fix that.

Upon initial inspection I noticed the front side of the rear sight appeared a little rough then realized after looking at the front sight the ramp or stop had sheared off. I imagine it looked similar to the stop on the front site pictured for reference. I contacted Eagle Imports about this and unfortunately they do not have any parts available yet so they will be sending a new sight when available. Plastic sights that can break are an obvious concern but I plan on taking advantage of the top rail and will be mounting a red dot.

Front Sight

My second concern is lower push pin set-up. At first glance it appeared the rear push pin broke through the housing but what looked like a break is just basically a stepped portion of the lower housing where it meets the upper receiver. This could have been designed better. In the second picture here you can see how the pin breaks that diameter in the housing on both sides. Housing material just above the pin measures 0.082” thick which seems a little thin. Hopefully this holds up and doesn’t wallow out after time. The bright spot here is if the lower does need to be replaced it can as the upper is the serialized/registered portion.

The lower pins have two sets of grooves that engage a wire retainer that simply slips into the housing. These wire retainers apply quite a bit of tension to the pin. I was not able to push the pins out by hand or at least I couldn’t get them to budge by hand. Use of a punch and small dead blow mallet did the trick. It didn’t take much effort to break them loose; it was just a matter of quick tap to get the pin retention groove past the wire retainer. You can also see in these pics that the lower housing is symmetrical in design meaning you can move the retainers to the left side of the lower (installed in right side from factory) if you wish to push the pins out from right to left.

Rear

Front

Upper receiver assembly: Very clean machining, fit and finish. Bolt travels the length of the receiver very smoothly. The upper looks similar to the B&T GMH9 and APC9 but the noticeable difference are the screws used to assemble the B&T uppers. Grand Power uses a barrel nut to assemble the upper creating a much cleaner look.

Bolt

Buffer: Two buffer pads attach via the pins shown here.

Bolt Hold Open/Release
Somewhat of a different design, an ambi bolt hold open/release straddles the outside of the lower receiver and is held in place by the front pin.

Tension spring for BHO

Last round bolt hold open

Trigger Group
As you can see here, the trigger group appears to be a self contained unit that slips into the lower housing. I wanted to remove the trigger group for pics but I couldn’t immediately see how to remove the safety selector. I need to take a closer look at that.

Mag Release

I just purchased the brace adapter and a Gear Head Works Tailhook Mod 2 brace hoping it is compatible with their brace adapter. We’ll find out soon.
Looking forward to taking this to the range and will report out then.

Here it is in it’s current configuration. Shot 147 grain ammo suppressed with no hiccups at all.

Very easy to keep on target. Not as soft shooting as my APC9 or SIG MPX but much smoother/softer than the Scorpion and maybe a little softer than my AR 9mm SBR. I’ll need to run it side by side with my AR 9mm SBR to be sure.

Shot it side by side with my APC9.

25 yard pistol range. Left/first target dialing in the MRO. Target on right second mag. Looks like it could go up and to the right a little more but at that point I just started having fun with it.

Unertl Info Database

There has been a lot of interests about Unertl lately. A lot of places keep asking for links to the articles I have done over the years. So I am putting it all together here to make it easy to you to find the technical info I have shared over the years. The post also has some links to related externally adjustable optics like Fecker scopes etc.

Instructions on the scope and it’s adjustments.

Links to articles.