r/Tacticalshotguns

What's up guys, just showing a small clip of our up coming RX Arms Beretta A300 Ultima Patrol Compatible QD Side Saddle Shell Carrier. This is a patent pending design that we have been working on for over a year now.

This one is showcased on the Beretta A300 UP, with the mounting plate having cutouts that keep the exterior receiver pins on the A300 exposed. Also compatible with many other platforms like the Benelli M4, Beretta 1301, Mossberg 590/500/Maverick 88, Remington 870, Keltec KSG to name a few. We have printable template that you can print off and see if it works with your receiver if your gun is not listed above.

Hope you guys dig it, we plan on having these available in the fall 2026. If you feel like keeping up with the release of this you can signup on the waitlist on the product page.

Let me know if you have any questions at all I'd be happy to respond!

Hey everyone,

Just finished putting together my very first shotgun build using a Mossberg 590 Persuader as the base, and wanted to share the final look with the community. I wanted to balance a functional setup with something that just feels solid to run.

Ended up swapping out the stock furniture for the Magpul SGA and VOA handguard, and added the Black Aces quad rail and side caddy to keep extra shells on hand. Also dropped in the NDZ safety and follower kit to smooth out the internals.

Full breakdown of the parts is in the list below. Let me know what you think, or if there’s anything else you’d throw on it!

📋 The Build Sheet: Mossberg 590 Persuader

Furniture & Frame:

Handguard: Strike Industries VOA Handguard (Black)

Stock: Magpul SGA Stock (Black)

Rail System: Black Aces Tactical Quad Rail

Upgrades & Reliability Internals:

Safety & Follower: NDZ Performance Kit (Enhanced Tactical Slide Safety, Detent Plate, and Detent Spring)

Accessories:

Shell Carrier: Black Aces Mossberg Side Shell Holder

Sling: Magpul MS1 Sling (Black)

Bushnell Trophy TRS-25 Red Dot Sight Riflescope, 1x20mm, Black

Was looking at a 20" 590 persuader and opted for a 14" 590A1 instead . Ghost ring sights are gorgeous and this thing will outlive me and likely all my niece and nephews too. Happy belated 4th all the way from Canada to you yanks.

Shooting 2 3/4 Sterling slugs

Bought two boxes of 25 for 13 bucks. I accidentally left them in my truck and didn’t realize it and it rained bad for a few days. I found them a week later still in the box in the
rural king bag but now they look like this. Will it be OK to run them?

My son enjoying the SPX

Experimenting how the c clamp method works on pumps. Designed a heatshield that goes over a Surefire LM forend. Overall it’s pretty pleasant but something to get used to.

My first A300, and first shotgun in a very long time. Designed the sling adapter myself as soon as I realized the abomination that is the rear sling socket. Has the Esstac card and probably going to go for the LTT shield and a light next. Kind of a fan of the red fiber too, she might stay.

So I would like to get an M1 super 90 with rifle sights and then have it drilled and tapped on top to put a red dot. Will Benelli drill and tap it for me?

I already have a 1995 made M1 super 90 with ghost rings Sights and I’d like to add another one with a red dot. Yes, I know I could get a new M2 but I wanna stick to the OG of them all.

Dare I say almost done? Still need to sort out pressure pad for light. But, thinking it's gtg

Reupload because the picture quality in my last post wasn't great. This is my Maverick 88 security and I was going for a classic sorta vibe. From tip to butt, it includes a Defender Tactical oversized front bead sight, a GG&G Mossberg 500 light mount with a Streamlight PolyTac, a Slade Street Tactical metal heat shield, a Mesa Tactical 6-shell aluminum side saddle, a Shoten Armory short arm extended slide release, hockey tape, and an ATI Shotforce pistol grip stock.

I'm also running a Rio 9 pellet #1 buckshot load for home defense. So far, I've put around 250 shells through it without any malfunctions. I've run 120 rounds of full powered NobelSport #4 Buckshot, 25 rounds of Rio 9 pellet #1 Buckshot, 5 rounds of Winchester Magnum slugs, and around 100 rounds of Federal and Rio #8 and #7.5 birdshot.

870 AOW with an Armed To The Teeth Technologies mount (18" barrel had to be mounted for the trap range) and a rarely seen Sauer SL-5 3gun. Anyone else have one of these things, they got blown out for like 550 a few years ago and are supposed to be just as good as the Benelli M2.

Trying to use that underbarrel is torture btw, my best was a 13/25 once but I just took it out and then it dropped to a 3/25 lol.

Turknelli M4 (Raven R4 in Bronze), holosun red dot. Rxarms mlok heatshield. Repro light and mount. 3d printed match saver, hand stop and railscales

Traded a gen6 Glock 45 with vortex defender for this sick ass a300 raider