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Posted: 7/4/2026 5:54:33 PM EDT
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Just ordered an MKE MAC 5 package from Atlantic. This is definitely getting an FRT. Much prefer a 3 position as I used to have a transferable MP5 years ago. The missus has seen the FRT's in different firearms and said to outfit the new one with an FRT. Who am I to complain. I have Super Safeties in a few rifles, and a Trigger Kicker in another. |
I hated going to weddings. All the grandmas would poke me and say "You're next". They stopped that when I started doing it to them at funerals.
Sic semper evello mortem tyrannis
Sic semper evello mortem tyrannis
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Originally Posted By StealthyBlagga: I’m gonna be the one to say it. The Rare Breed is by far the best option available today. Mine has functioned flawlessly. I wish ASD would have had their act together sooner. The Rare Breed seem to get good reviews. I'm personally waiting for the ARHK because I have hosts with SEF and ambi lowers. Having one pack that works in both housings is a huge plus. |
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RB if you wanna rock and roll by next weekend. ASD Mafia is rolling out their awesomeness in a month or so. 1500 units first allocation and no pre sales. You think trying to buy a Green G$ Blemula rifle is tough? Try and get one of these  That said I pre bought their 53 lower last November and they canceled the project for the slip trip so it was useless to me. They were cool and going to refund me, I said nah just keep it as store credit for when the pack arrives. Imagine my disappointment in a month or so when I can’t spend the money I gave them a year ago as they’ll be sold out so dang fast.  I might just say fuck it and sell my 53 at that point lol. J/K but I will make them buy me a beer for my wait if I ever run into them at the club lol. 
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I just got a radiata victrix for my ptr. It works well. I hope someone eventually sells just a cam/lever so that push button can be switched out.
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"Some people have issues. Sounds like he signed up for an entire subscription." ~Brohawk
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Arfcom St Jude Mafia 3 years
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Proud member of Team Ranstad.
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I’ll be honest I had nothing but issues with my Lee lower and super safety. I don’t think I ever made it through a full mag without a malfunction of some kind. Something was always up with ejection. With nothing but the rare breed trigger pack and Mke ejector Its run like it’s a factory select fire. |
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Honestly, I prefer my ASD lower and S3G. I got the stripped lower and put in an Arcfire V1, then fairly quickly transitioned to the 45/90 V2. That, combined with a titanium slip trip, has over 2k without a single malfunction in an MKE AP5P/MP5K. I like the ARHK for aesthetics, but the ergonomics of an AR-style lower and a G trigger make it not worth it to me to switch.  I'll admit, the ASD lower is ugly, but I'm hoping their planned 'grip' and HK-style safety will solve that. Otherwise, to me, it's superior to the drop-in options for the ergonomics and trigger quality. |
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
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I went with a Lee lower and grey market research parts. H&K SP5 for the gun. Thing has been solid from day one and I installed it when pretty much the only forum talking about it was Hoffman Tactical forum. There is no way in hell I'd buy a pure greed. Of course I have morals and principles. Might as well donate to the brady champaign or everytown when buying from pure greed. pure greed is doing the same thing as any anti gun democrat. Restricting your right to choose what frt you purchase. |
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Originally Posted By 50cal: Just ordered an MKE MAC 5 package from Atlantic. This is definitely getting an FRT. Much prefer a 3 position as I used to have a transferable MP5 years ago. The missus has seen the FRT's in different firearms and said to outfit the new one with an FRT. Who am I to complain. I have Super Safeties in a few rifles, and a Trigger Kicker in another. Got it in less than a week. Pops right in (follow the direction in the video on their site, there are a couple extra steps over OEM). Test fired. Was getting failures to eject multiple times per mag. Ordered German H&K made ejector and extractor. Installed. Test fired 250 rounds. No stoppage except the 29th round in a mag loaded with 124gr HST hollow points. Research says i need German made mags to feed hollowpoints as all the clones come with Gen 1 type mags. H&K updated the follower and feed lips in the Gen 2 mags to feed hollow points. Dont know if ill bother for what is essentially a range toy. |
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As an extra note on my post above, if you are using the Rare Breed in a clone, or an actual H&K for that matter, having ejection issues. Fix the ejection issues before installing the Rare Breed (exactly like I didnt do ). Heres why. An empty fails to eject, jamming up the action. You yank the charging handle to the rear and lock it back. You yank out the mag, and most of the time that clears the issue. However, with the Rare Breed, there is a possibility of a case or live round dropping out of the action and into the FRT cassette, ahead of the trigger. If that happens, here's what happens next, because it happened to me. This was prior to fixing ejection issues. The empty/live round is sitting in front of the hammer. You pull the trigger. CLICK. Hmmmm. Try to pull back the charging handle, only moves a half inch or so. Feels solidly locked up, because it is. When you pulled the trigger, the hammer rotated forward and that case/live round dropped further into the cassette and not only prevented the hammer from hitting the firing pin, but blocked it from being re-cocked I thought id broken the thing until I got home and took it apart and found the empty in the front of the cassette. Heres why that can happen with the Rare Breed and not the OEM trigger group. The OEM has this screw in that location and welded in place. Never thought about why that may be there, but likely something similar. Attached File The Rare Breed doest have this and is simply empty. Attached File |
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Originally Posted By mak0: You shouldn't use aluminum cased ammo in any MP5 clone. You will have issues due to the chamber flutes. Originally Posted By mak0: Originally Posted By HKPDW: FYI: Don't shoot aluminum cased ammo in MKE guns Otherwise, you'll be dealing with the above You shouldn't use aluminum cased ammo in any MP5 clone. You will have issues due to the chamber flutes. |
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I have an MKE AP5-SD. First SS experience was with a Lee Sporting lower with War Hammer SS. Worked flawlessly with a 90 degree locking piece. Ammo used was 115gr to 150gr Syntech and a bunch in between, including steel cased Tula. I was never keen on how these aftermarket lowers change the classic MP5 look, so I picked up a Rare Breed. The trigger was a bit heavy in semiauto until I got a few mags thru it, now it's good. Works flawlessly in FRT mode also 
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| Thanks for the replies. Especially the round in front of the cassette. Had never heard of that before. |
I hated going to weddings. All the grandmas would poke me and say "You're next". They stopped that when I started doing it to them at funerals.
Sic semper evello mortem tyrannis
Sic semper evello mortem tyrannis
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I was super happy with my Grey Market Super Safety, Lee lower, and AP5-P. Attached File But then Rare Breed came out with their trigger pack and I swapped. My OCD didn’t like the cross bolt safety, even though everything ran great. |
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I have a new AP5 with a RB SEF pack. So far I only have a few mags through it. I ran some 147 gr. Blazer and some 124 gr. FMJ, both suppressed and loud. I was getting a handful of malfunctions. Primarily failures to feed, at around 1 or 2 per mag. Too many. The RB pack has a bit of slop in the MKE lower. Switching back to the factory pack, I don’t believe I had any issues. It’s a pain swapping the ejector back and forth, so I plan to get another lower with an HK ejector to make swapping easy. Also, I plan to shim the RB pack to take up the slop and I don’t want to have to swap shims around as I’m moving trigger packs around. I also have some concern about the AP5 having a 120° locking piece, as I like to shoot primarily subsonic/suppressed. I’m struggling to find anyone with HK locking pieces in stock. I just received a PTR 90° and 100° LP and found both give excessive headspace when installed. So I’ll need to get some oversized rollers before I try shooting either of those. More to come… |
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Originally Posted By GarrettJ: I have a new AP5 with a RB SEF pack. So far I only have a few mags through it. I ran some 147 gr. Blazer and some 124 gr. FMJ, both suppressed and loud. I was getting a handful of malfunctions. Primarily failures to feed, at around 1 or 2 per mag. Too many. The RB pack has a bit of slop in the MKE lower. Switching back to the factory pack, I don't believe I had any issues. It's a pain swapping the ejector back and forth, so I plan to get another lower with an HK ejector to make swapping easy. I also have some concern about the AP5 having a 120 locking piece, as I like to shoot primarily subsonic/suppressed. I'm struggling to find anyone with HK locking pieces in stock. I just received a PTR 90 and 100 LP and found both give excessive headspace when installed. So I'll need to get some oversized rollers before I try shooting either of those. More to come |
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FWIW I have a clone POF-5 full size with a RB trigger in it and it runs 100%. Had issues in the beginning, most notably I replaced the ejector and bent it a little to fit in the bolt groove better. Larger issue was the ammo. I shoot suppressed all the time, and it will NOT shoot FN bullets reliably. I was shooting 147 FN which was a jam-o-matic. I switched to 147 RN's and it's yet to jam or fail to fire hundreds of rounds. SBR'ed it and it's my new favorite until the new ARHK triggers come out late summer. Really looking forward to an HK91 in rock and roll. If I could do it again I'd buy a real HK MP5 new semi gun, and do the rest, SBR, trigger, etc. Perhaps I still will. |
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| I also purchased a POF MP5, I’m REALLY happy about the quality of it. I installed a Rare Breed in a Factory HK Ambi trigger housing with a Factory HK ejector and spring. I’m at around 2,000 rounds with no issues! |
"When trading bullets it is better to give than to receive" _____________________
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"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell
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Originally Posted By HKPDW: I have two that run fine without being shimmed… I’m pretty sure the shimming is only needed on some NON HK trigger housings. |
"When trading bullets it is better to give than to receive" _____________________
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - George Orwell
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Originally Posted By PursuitSS: I'm pretty sure the shimming is only needed on some NON HK trigger housings. I'll try to get a depth measurement next time I have it apart and post it in this thread. |
Know Guns, Know Peace, Know Safety...No Guns, No Peace, No Safety
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Originally Posted By Hanz: Correct. I've read that it's encountered on MKE AMBI only. I had to shim mine, once the correct thickness was achieved she ran like a top. I'll try to get a depth measurement next time I have it apart and post it in this thread. My RB Ambi pack was a straight drop-in in my MKE AP5-SD with ambi lower and it runs flawlessly in semi and FRT modes so far, though I don’t have a lot of rounds through it yet. What are the symptoms of needing a shim? |
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Originally Posted By StealthyBlagga: My RB Ambi pack was a straight drop-in in my MKE AP5-SD with ambi lower and it runs flawlessly in semi and FRT modes so far, though I don’t have a lot of rounds through it yet. What are the symptoms of needing a shim? My AP5P was also a drop in, no shims Have several hundred flawless rounds through mine. |
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Originally Posted By StealthyBlagga: My RB Ambi pack was a straight drop-in in my MKE AP5-SD with ambi lower and it runs flawlessly in semi and FRT modes so far, though I don't have a lot of rounds through it yet. What are the symptoms of needing a shim? Foil tape, crappy photo Attached File |
Know Guns, Know Peace, Know Safety...No Guns, No Peace, No Safety
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I have an MKE AP5-SD and both the Rare Breed and Lee Sporting lower/War Hammer SS have worked very well. Plug and play Both in action |
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Originally Posted By Biggus_Dickus: I recently bought a MAC5 from a local shop. Put the SBR paper work in before I left. Went home and ordered the Rare Breed FRT. Got it in less than a week. Pops right in (follow the direction in the video on their site, there are a couple extra steps over OEM). Test fired. Was getting failures to eject multiple times per mag. Ordered German H&K made ejector and extractor. Installed. Test fired 250 rounds. No stoppage except the 29th round in a mag loaded with 124gr HST hollow points. Research says i need German made mags to feed hollowpoints as all the clones come with Gen 1 type mags. H&K updated the follower and feed lips in the Gen 2 mags to feed hollow points. Dont know if ill bother for what is essentially a range toy. My AP5 has run flawlessly with the RB and both German and Turkish mags. 115/124 ball, old Gold Dot +P, Winchester Ranger 147gr BHP… it’s like the honey badger. |
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Originally Posted By mak0: AS Designs ARHK is in production and supposed to be shipping in a few weeks. It's a drop in trigger pack, no slip trip or aftermarket lower needed. I was running a Leber v2 lower/SS combo, and apart from a couple of snapped slip trips, it ran great. But I just didn't like the "cross-bolt" safety, and jumped on a RB FRT-RD3 (SEF) and haven't looked back. I maintain the look and feel of the MP5K and it runs like a raped ape. Let's just say "...cold dead hands." |
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