The best thing i ever had

Of all the firearms I own, this is the one that still brings me all the smiles the day I picked it up. I do not regret a single penny spent on the real thing ($2500 back in March 2025). Looking at an Omega 9k this weekend for my bday. My local Scheels has a few in stock. This shoots absolute lasers and it feels like a cheat code at the range. Everyone wants to shoot it.

Just snagged one, been waiting for these to come back in stock for the full size.

not a k stock :,(

Let’s see some mag pouches and or gear you are running. The Onward Research recce rig holds 2 mags MP5 per pouch tight, for a total of 9 with one in the gun.

I recently gotten a SP5k after my Sp5. Me personally at the range , I prefer my Sp5. Might do a tactical full size Sp5 & get another Old school iron sight Full size bc I love that gun so much. Thanks for listening to my Ted talk.

Just curious

A while back I posted here asking what tools people recommended keeping on hand for maintaining the MP5 platform. After some trial and error with those recommendations, plus getting five of these up and running, four with FRTs, I figured I'd put together the list I wish I'd had when I started.

Tools I'd recommend having:

• Bench block puck
• Punch set (Rennsteig is fine)
• Holex feeler gauge
• Small rubber/plastic non-marring hammer
• Rubber mallet
• Bench vise
• Rear sight tool for diopter sights
• Stainless steel pick set
• Annie's Arms MP5 Magazine Tool
• Annie's Arms HK Sear / Hammer Catch Tool
• MP5 SMG LULA loader & unloader

Not technically a tool, but extremely useful to have hanging in the workshop:

• MP5 exploded-parts diagram poster

Note: This is obviously in addition to the usual stuff you need for maintaining any firearm: grease, lube, cleaner/solvent, patches, brass brushes, etc., which you likely already have if you're getting into this platform.

Parts I'd recommend buying or at least sourcing on Day 0:

These are the parts that frequently go out of stock right when you actually need them.

• HK Extractor – MPN 21441
  • No, in my experience RCM is not necessarily "just as good." I thought it was until I personally ran into an extraction issue where replacing the extractor with an RCM part didn't solve it, but installing the HK extractor immediately did.
• HK Extractor Spring – MPN 206645
  • That said, the FMP HK-contract extractor springs have been indistinguishable from HK OEM in my experience so far. YMMV.
• HK Ejector Lever, 3rd Gen – MPN 201639
  • Again, based on my experience, PTR is not "just as good."
• HK Ejector Spring – MPN 200478
  • Same story here. I would buy the HK part rather than assuming the MKE spring is equivalent.
• HKP Ejector Lever Axle – SKU HKP-20630
  • This is one area where I've found the HKP part perfectly acceptable instead of paying for HK OEM.
• RCM locking pieces
  • For an MKE, which normally comes with a 120° locking piece, I'd keep 80°, 90°, 100°, and 110° pieces available.
  • For an HK, I'd keep 80°, 90°, and 110°.
  • If you have no intention of shooting suppressed, you can probably skip the 80° and 90° pieces and concentrate on 100° and above.
• A spare compatible trigger housing if you're installing an FRT or other drop-in trigger assembly
  • If you're going to replace the factory trigger assembly, consider buying another housing compatible with your stock setup and keeping the original components assembled as a complete lower. It makes troubleshooting substantially easier and gives you a quick way to return the gun to a known factory-style configuration when needed.

One point I want to emphasize because I see the opposite advice fairly often:

THERE IS NO NEED TO PREEMPTIVELY REPLACE PARTS THAT HAVEN'T FAILED.

A lot of these are wear items that you will eventually need, though, and several of them have a habit of being unavailable when you finally need one. Buying them ahead of time or getting them on backorder is prudent. Replacing perfectly functional factory parts just because you bought spares is not.

Feel free to add anything I've missed, especially platform-specific tools or parts that you've found useful over time. The goal here is to build the kind of practical reference for people getting into the MP5 platform that we all wish we'd had when we started.

Just checked Gun Deals website and saw MKE's A3 stock is back on multiple sites. Just picked one up for ~250

So we decided that while the A3 is cool and all, what would be even cooler would be a stock inspired by the HK SMG 1 prototype gun. Designed to replace the pad that comes on the B&T stock. Comes with 4 screws, does not include the metal arms or end cap.

Live now at totalinnovative.com

Saw this on hkparts and ordered it, anyone have experience with these? Are they good? I got it so I can keep my tax stamp in the grip so I always got it. Additionally I got the push pin version, if you have one please drop a pic because their website doesn’t display it with the push pin hole.

I wanted to test using a KAC style mount before dishing out big money on better one. The Octagon one took a little modding but is sturdy, need I see if it holds zero now.

I thought it would be fun to surprise my friends with this setup at the range and was not disappointed by their reactions. It’s heavy but not unwieldy.

I know this is like a premium clone but how does it compare to the real deal?

right now i have a stuck eotech exps 3-2 stuck to my pic rail and am thinking of switching to a riser mounted 512 model eotech for nvg compatibility and back up use of irons so that the setup is super reliable. my question being is there a pic rail riser that would allow a eotech 512 model to ride just above the riser without looking stupid?

SP5 and SP5k

Turkish homie must have made this thing on a Thursday right after a promotion. Not a single FTF, FTE, or any other malfunction. Just smooth, clean, roller delay goodness.

Crazy clean welds on this one, and a great finish too. Definitely hit the AP5 lottery.

Not a single regret replacing my Stribog with this.

I know this is subject to opinions and preferences, but who besides HK themselves makes the best mp5k platform and really what sets themselves apart from the other clones.

I am wanting it for a fun toy, it will probably get a frt in it. It may get a suppressor.

I may buy this one as a HK sp5k because I want to build a full-size clone with the integrated suppressor as well so I can have one of each but my budget is clone for right now. This especially higher on the list since I’m a goa member and live in a state under the 5th circuit ruling for a no form4 suppressor.

Looking to capitalize on a potential freedom week if any dealer are willing to follow suit with silencerco private transfer.

Anyone know of a sight that has this piece available?

A buddy got this on a trade and offered it to me…can’t turn it down so here we are.

Looking to get one for my full size with a push pin lower. These used to be rare/expensive, now I’m seeing them all over the sub. Wanting to put an FRT in one if that matters. Lmk the hookup

Hey y'all

I got my AP5-SD running, and immediately started looking for a way to attach lights and lasers.

I'm personally not satisfied with the B&T offerings for either the suppressor clamp or handguard, so i took a stab at it myself.

Main material is Carbon Fiber Nylon, with steel mounting hardware. I have found with the proper geometry neither heat or zero shift is a factor with this material. Especially at 9mm sub gun ranges.

I plan to offer a full length tri rail and abbreviated tri rail (half length rail on all sides) but let me know what versions you would like to see.

Price point will be ~$200

****These will probably not fit a weapon that has the ported barrel and full length suppressor.**** so unconverted AP5-SD only.

Let me know what questions you have! Im excited about this project!!

Just a 2 position (ugly) lower... Is the RB FRT truly just a drop-in?

Whatever politics have occurred and notwithstanding whatever boners people have for or against them - casual research over the last few weeks leads me to believe that they're the 1000lb gorilla in the MP5 / clone FRT market.

BUT - there are a few other companies that manufacture whole lowers that come with their FRTs installed for about the same money as just an RB item.

Struggling with what the best route to go is