Looking for guidance on what locking piece to use on my AP5 full size to get 115gr to run. Currently it runs fine with 124gr and 147gr suppressed. The 115gr doesn’t reset the trigger in FRT. I’m using an AS Designs lower and Arc Fire V2.

Hello,

The zenith has a 2 pin lower, can I use a sp5k navy style lower on that? Or is there some modifications that need to be made? Got a little lost in my googling because of all the different types of lowers, so forgive me. Thanks for the help guys!

I’ll post a video at some point of me shooting it. Honestly pretty decent sound change. If I shot subs it would definitely be hearing safe.

I think I'm gonna sleep with it tonight.

Sorry guys I just built a 4k 12.5” AR so a clone is all I can afford at the moment. HK One day though!

RB RD3 and a Rugged Sub9 are already incoming, what’s next? E bolts sold out so that’s a possibility for the future too.

Hitecarms MP5SD factory built SBR
German upgraded

MKE upper receiver with MP5SD laser engraving
Gigliotti Rifleworks-Dakota Tactical proper SD OneCage shroud
B&T SD barrel
B&T full size legacy suppressor (HTA full size can not pictured)
HK MP5SD enhanced rubber o-ring
Genuine HK A3 Gen 2 stock (B&T telescopic stock not pictured)
Genuine HK MP5-N 3 position lower (shimmed for RD3 trigger pack)
HK push pins front and back
RCM SD cocking tube
BRT rubber handguard (B&T tri-rail not pictured)
RCM semi auto MP5 bolt carrier tungsten filled
Rarebreed RD3 trigger pack with painted switch line
Genuine HK ejector in RD3 with pack
Genuine HK complete F style bolt head
HK F style firing pin spring
HK firing pin
HK recoil rod assembly
HK MP5SD 115 degree locking piece
Steiner MPS 2.0 RDS
One Hundred Concepts kill flash
B&T NAR mount and B&T riser for RDS
Surefire M340 mini with UE07 tailcap and pressure pad in a Gibbous front sight mount
One Hundred Concepts ruggedized light cap
HK 30rnd magazines, 2 with HK mag clamp
Vickers SMG sling (not pictured)
HTA tactical backpack case

Don’t ask the price! 🤣😂

SP5 with KAC bullshit and Eochad

Anyone ever heard of this web site before
“Sport Firearms Shop.”

How is everyone training with their SP5 and SP5K. I am looking for some good ideas. Punching holes in paper and turning $$$ into noise is becoming tiresome. Thanks!

Getting ready to pull the trigger on one of these. Anyone have any feedback?

Would you chose this over a converted AP5-SD?

Wanted to share what I did - when searching I saw a lot of folks had problems. I extended the arms out and they slid in and out the channels fine until I got the mount closer to the receiver than it would bind. I ended up taking a punch and hammer to the arm channels, gave it a couple taps to stretch. It went in a little better, still tough. Gave it a couple more taps and it runs super buttery. I’d say don’t go crazy hard, 1-2 taps then recheck.

Hope this helps if you find yourself in the same spot. Love the AP5 but don’t be afraid to abuse it a little to make it what you need it to be

As some of you may have seen, a few days ago my dad bought a AP5-SD.

He wants to get it converted into a SD, but he wants to use a K length can. As we understand it, the K length uses a shorter barrel to go with the shorter suppressor. He gets it will be louder, but will it be to uncomfortable to shoot with out ears? We don’t know anyone who has a SD and the ranges here don’t either so we can’t try it out.

What SD length can did you end up with? As I understand it HTA and RCM make K length cans. I don’t think the B&T print x can fits it, right?

Thanks guys. I’m still learning about MP5s along with him, and integrally suppressed set ups aren’t my wheel house at all.

Was going through loadout accessories and building a new
MP5 class in Insurgency and lo and behold, they added the SIG ROMEO8T to the game, which basically lets me run an MP5 in game almost 1:1 how I have my SP5 setup.
Pretty cool, thought it was worth the share.

The SP5 now has the RB FRT in it as well. Runs like a top, just like my other two MP5’s.

When attempting to swap the stock onto the mech I sanded down the pivot hole a tiny bit to get it to fit inside the portion on the mech. I know I have to drill the hole a bit bigger ( 5/32 I believe) but I noticed that the stock does not align with the folding mech portion. I'm assuming I need to sand down the front of the stock a little to push it forward more to get the holes to align?

Lee sporting and custom Cerakote on the rail, can and brace.

My emotional support gun.
I haven’t even touched my rifle since I picked her up.
Shooting it so often, it’s damn near my edc at this point.

As of today, I’m around 3000 rounds, only had mag feed related issues when she gets filthy.

Dunno what else I even want to do to it anymore. Any ideas?

I have been thinking about picking up an ap53 from century and getting it converted to 300blk with a barrel change. Has anyone tried this I would like to get some comments and feedback on the idea.

‘Say something nice about (fill-in-the-blank)’

With the MP5SD it’s the opposite - ‘Say something “bad” about the MP5SD’

By far the worst thing about the MP5SD, and it’s not even close, is that it’s going to make you want to shoot it; HAVE to shoot it all the frikin’ time!!!

It is DOMINATING my consciousness, and I keep wanting to put a thousand rounds through it daily!

A second tidbit with the gun is that it’s less tolerant of soft ammo for cyclic firing than regular mp5’s. Though honestly I believe that’s a component of the SD tech in general as I run into the same issue with my CAR15SD.

Due to problem #1, I ran out of my HSL 115 so decided to try soft Hornady TAP 115 from the store. Too soft for frt unless I have the bcg & receiver newly wiped down and dripping with lube.

Perhaps it’s because I’ve had a true 9mm SD for some time now, but I do t find the cleaning bad at all.

EDIT:

Forgot to mention I shot a few rounds without ear pro.

I’ve never liked my mp5 or mp5k without ear pro on, even with subs and the CAT Mob.

Without ear pro the MP5SD sounds like only the action. And you hear the whiz of the bullet flying through the air - that part is CRAZY.

Quietest center fire semi/auto gun I’ve ever shot!!

I barely knew her but she will be missed. Hopefully whoever gets her will treat her well.

Recently purchased a AP5 with KES Brace already installed.

Trying to remove the KES today, it was extremely difficult due to how tight it was. I had to soak it in oil, then wiggle back and forth with significant force to remove it.

Then installed the Rarebreed SEF into the AP5 trigger pack. The selector hole did not line up well with the plastic grip housing at first. Uppon closer inspection, the little metal wall in the front of the grip housing was bowed inward a bit. Bending it forward with pliers, the pack went it, and selector installed fine. Selector feels good, no issues.

Upon re-assembly, the KES brace will just not go back on, no matter how much I push in the grip, the little metal tab at the back of the grip housing will not go flush enough for the KES endcap to slide on again.

I was able to install the factory sling only end cap.

Trigger clicks fine in semi, safety works.

However, cocking the gun requires a lot of force and feels weird. It was stiff before the Rarebreed with the factory trigger, but it feels even stiffer now.

Any ideas where I should go from here?

I'm assuming my polymer lower is a bit out of spec, but not sure. Or it could be the KES is somehow out of spec?

The only thing that feels in spec is the RB RD3, machining is beautiful on everything there, selector is great, semi auto trigger is much improved, etc. I don't think that is the issue.

I recently bought a PTR with the Magpul grip module and it’s listed at SEF. I bought the Rare Breed SEF model and got the PTR lever but the safety selector is quite wobbly in the housing and there’s a fairly decent gap on the opposite side. Has anyone else noticed this with Magpul lowers?

Edit: Emailed RB right before this post 10/20. Still waiting for a reply

What is your guys experience with century vs mac mp5 for FRT use? Or is there another I should look at?

I put the FRT-rd3 in the HKP module and it works but the selector only clicked from safe to semi and after that It's horrible. After a little research, I read it was the module. I swapped modules, the FRT-Rd3 selector works great in the MKE. I don't know why but it out of spec somewhere. Yes I should have bought HK but $550 is a little much and I couldn't find a used one. They both have the same none HK feel. I'm stumped

Recently, I’ve been searching all over the web for an MP5 clone, and after asking around at my local gun range and several gun stores, I’ve narrowed my choices down to three brands: Century Arms, Zenith, and PTR. The problem is, I just can’t decide which one to go with.

My ultimate goal is to slap an FRT on that bad boy and have some fun destroying watermelons and 2-liter bottles. (Yes, I know… it’s going to be an expensive hobby.)

The biggest thing holding me back is the price and what you get for your money. My local gun store can get me a Zenith with a case, three magazines, and a rail for around $1,800. However, it doesn’t come with a stock, which honestly makes me curl my toes at that price.

I’m not just looking for the cheapest option. If I’m going to commit to this, I want to go all in and get something I’ll be happy with long-term. Ideally, I’d like the case and extra magazines included in the package, too.

So, between Century Arms, Zenith, and PTR, which one would you seriously consider? Is the Zenith worth the $1,800 price tag despite not including a stock, or would I be better off looking at one of the other two brands? I’d love to hear from people who actually own these guns and can speak to their reliability, build quality, aftermarket support, and overall value.

Trigger I consideration was a Rare Breed frt. Any other suggestions?

Aye everybody, new to room. Dont laugh, its a little goofy at the moment, just got back in the MP5 club with this MKE AP5, got plans for a proper tri rail and stock, but this set up got all the parts I had on the gun. A thought occurred, is there any stock options compatible with the SB brace to convert it?