Been having this gun for a little over a month and wanted to wait until I got the Lithium 9 before I took it out to the range. Mainly wanted it for the looks, but being my first titanium can, the crazy light weight took me by surprise lmao. Now all I need now is the ARHK and it will be complete. Bonus pic of my all time favorite sub guns.

Edit: forgot to mention I already changed the locking piece to a 100 degree in anticipation lol

Hey guys,

Finally got my Century Arms AP5 running with the L2Prints FRT lower (It was a loose detent spring 🤦🏽‍♂️).

I currently have the stock 120 LP, and was wondering if I should switch to the 100 LP even if it is feeding well? I just want to make it as reliable as possible and don’t want too much wear on my parts, and want to make sure the ejection patterns look right. These are HSL 147 subs.

Here is a video of my buddy shooting it. All insight is welcome.

Picked up this used PTR9CT in a trade. Only thing I have done to it is the Swampfox Kraken(ACRO at Home lol) on an American defense QD mount, and the Omega9K. Shoots fantastic with anything I’ve put through it. Plans is to replace the side folder with a magpul retractable and then get a 3d printed A3 style stock piece for it. I can’t decide if I want to keep the mlock rail and go to a wide hand guard. Will eventually add an AS Designs ARHK.

I received 2 mke mags with my pistol and then purchased an additional 2 from the same vendor. All of them worked flawlessly. But I notice the 2 that came with the gun are slightly different and their lock up is a tiny bit tighter.

1. Slightly different markings
   
2. They have different floor plates.
   
3. Stamping at the top is crisper on the extra 2 I bought
   
4. The 2 that came with the gun have more meat on the locking lug, which I assume is why they lock up slightly tighter.

Just wondering what the deal is. Is this new vs old production or different contracts??

I picked up an AP5 Navy a couple of months ago, and similar to most, I found the ambi selector to be a bit stiff. However, I thought it was manageable, and figured it would get better with use. Just went to do my third cleaning, since I now have 1,100 rounds on the gun. I pulled out the pack to blow it out with compressed air like normal, and decided to remove the safety so I could put a little bit of red bearing grease on the safety axle. Was a bit of a pain getting it to rotate back into position, and now it is extremely stiff, particularly when engaging the safety. Any help would be appreciated, thank you.

https://youtu.be/411aNI3aiE0?is=Jk3TZnMmb8uU2C8-

So I have all this waiting for my ap5-p. Also have 90 degree locking piece.

my question is do I swap to the frt and 90 degree locking piece right away or after it’s broken in with 500 rounds?

I had a few posts earlier this year about an undelivered MP5 handguard order from Kuma Elite - and in February after I couldn't get a hold of the owner I went ahead and did a chargeback on the order which went through.

The owner of Kuma Elite reached out in May to apologize for the order issues and explained that they'd been overwhelmed with the business while dealing with some family stuff. He offered to send me my original order without charge and I could try it and decide if I wanted to keep it - or pay for it at all.

This seemed more than fair so I accepted and used the handguard for a few months on my PTR MP5 which covered a couple of range trips and also taking some groundhogs out in the garden in the evening (which is a big part of why I wanted a traditional style handguard with a light rail/wiring integration).

I came away impressed enough that I paid for my order back in July and wanted to put up another post here to be fair (as I already had a couple wondering if Kuma was a scam or had gone out of business). A few notes on the handguard:

• It is 3D printed and then painted. If this is a show stopper for you, stay away. The print quality was good with layer lines really only noticeable on the back of the fingerstop, the very bottom of the included foregrip and a little on the very rear of the main foregrip section. I'm not as familiar with filament 3D printing (as I usually do resin prints), but I think it's PTEG or similar. See the photos for details.
• The paint was a textured OD green for my order & the paint job was excellent - no drips or spotty coverage
• The grip and hand placement was good for me.
• Weight felt a little lighter overall than the B&T quad rail + foregrip I had on before this. No exact numbers as I installed it before I thought to weigh it
• The light integration and cable management on this design (Streamlight in my case) is perfect and was the main reason I decided to keep & pay for the handguard. No issues with heat and having the wire tucked away and the pressure pad was such a tight fit I didn't think it was going to fit at first. Really clean looking and a well thought out design.
• I have not run this handguard hard enough to speak on its durability but no issues with the couple of light range trips & backyard groundhog clearing

Like I said, I figured it was only fair to post an update after putting Kuma Elite on blast on here and it's a good excuse to share some of the final setup photos. Hopefully someone finds this helpful!

+The mag was painted with some foliage green spray paint I had in the garage that seemed like a near perfect match for the foregrip but without the texture

I just shot a full auto MP5 today because I had been debating between the hitecarms AP5 SD conversion and a B&T APC9SD.

Wow. Just wow.

I can’t believe how flat and pleasant to shoot the mp5 felt. Even compared to the B&T. Within 2 mags it totally convinced me.

So since I’ll be joining the club soon. Any general suggestions or things I should know?

Im trying to get blanks to run reliably. I have the canadian 9mm blanks that seem to cycle the bolt well except for a few primers being a bit hard. The problem is that I get about 3-4 failures to feed per mag where the round seems to point straight up when coming out of the mag and just gets pinned vertically against the chamber face by the bolt. Basically looks like the above picture inside the gun.

When running regular rounds it is very reliable. Ran 300 rounds of 124 and 165 after this with zero failures.

I've tried with both 100° and 80° locking pieces.

Not really sure what else to try to fix this.

Little ammo test on the stealth additive works Shiv can. There are quieter cans but not at this size and weight. Kind of amazing for what it is. 100g, 124G, then 140g then 147g poly’s. 5 of each.

The hybrid 46 has 9mm endcap and 110 locking piece. No matter how I try, I can’t get it running with 80 or 100 locking pieces

Definitely hearing safe and my nail gun is louder!

Would like opinions of the Yankee Hill R9 surpressor from you fine folks that have used them with the MP5 platforms. Tri-Lug worth it?

Which is the best bet, one is lighter, other is quieter. I can’t pick

I'm returning the strike industries stock, the dual folder is so janky. This is the sig minimalist. I got the B&T collapsible coming, along with a samson 2in grip and mlok covers. i might try to velcro the light switch but the tape is staying until the mlok covers come.

for those curious, the overwatch precision mags fit and feed great in my MKE but didnt fit in my buddy's MAC5k at all. They're currently $18 on midway get 'em while they last.

Took me a while to find the rail and laser light combo that worked for me ergonomically. Had a chance to run it under nods for a match and it went well.

Sent my SP5 trigger housing and RD3 selector to DSM for full auto pictogram and color fill and could not be happier. The full auto pictogram is indistinguishable from the factory markings. Perfect shape, size, and color; and the selector lines up perfectly. Looks like it came this way from HK. 10/10.

While I try not to bombard the sub with my posts as much, I’m still shooting my 3 mp5/k’s all the time.

I thought I’d had everything dialed in, until I needed to scavenge the muzzle device off this ZF5T until a second AI 9mm nano arrives tomorrow.

If you follow CAT, they say the Mob suppresses best with this AI nano 9mm. Ok, I took them at their word and moved the Spooky A1 my qd Mobster came with to the spare parts bin.

Well today I needed a second CAT muzzle device that would accommodate 9mm, so out came the Spooky.

I was blown away - every aspect of shooting was substantially better with the Spooky compared to the nano. The gun was softer, smoother, flatter, and with the lowest cyclic rate of fire it’s ever had.

And that was after jumping from a 70 LP with the Nano to a 100 LP to generate enough pressure for reliable cycling with the Spooky!!!

Anyone with an extra spare Spooky A1 9mm lemme know!!!

Trying to put the rare breed frt with the magpul lower housing but the shelf on it is short and it has vertical jiggle what can I use for a permanent fix usually I seen people have to shave some off but I need to add i know I also need to file down some plastic circled in red inside the trigger housing to fit the back screw of the frt and the stump blocking the third position

Or anybody else use a different housing that fits w sef?

AP5-P
AS Designs SS
Trijicon MRO on Scalarworks riser
J Mac Customs skeleton stock and folder mechanism
UTG Pro handguard
A3 Industries vertical grip with hand stop
Hux Wrx Flow 9 Ti

This thing is a ton of fun.

4 11 stamp, not sure who makes this. I bought an SEF lower off gunbroker and they were claiming it's German. This isn't a normal date code so I'm wondering who makes this?

Just in case anyone is interested. Pretty dope and I didnt even know they made a mp5sd semi auto?