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Rare Breed Triggers has developed a MP5 Trigger (Page 2 of 3)
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Originally Posted By FrankW134: Anyone else have any issues with failure to reset? I have a dead trigger with the stock on, if I remove the stock and cycle the bolt manually (pull/push recoil spring rod to cycle the bolt) it resets. AP5-SD for reference. Is the front of the trigger housing drooping? The trip lever has to be held down to a point. If it is not then the hammer will not be allowed to drop Something is causing the trip lever not to be held down or held down far enough Thats where I would start looking |
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Originally Posted By chase45: Is the front of the trigger housing drooping? The trip lever has to be held down to a point. If it is not then the hammer will not be allowed to drop Something is causing the trip lever not to be held down or held down far enough Thats where I would start looking Originally Posted By chase45: Originally Posted By FrankW134: Anyone else have any issues with failure to reset? I have a dead trigger with the stock on, if I remove the stock and cycle the bolt manually (pull/push recoil spring rod to cycle the bolt) it resets. AP5-SD for reference. Is the front of the trigger housing drooping? The trip lever has to be held down to a point. If it is not then the hammer will not be allowed to drop Something is causing the trip lever not to be held down or held down far enough Thats where I would start looking It helps to install the front pin, I'm too used to tinkering with SP5s. 
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Originally Posted By LineHaul: Need that ambi….still waiting Originally Posted By LineHaul: Originally Posted By lil_Sig: Rare Breed are in stock Need that ambi….still waiting Me to. I keep forgetting to check. My SEF runs great, and need the ambi to round things out. |
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Originally Posted By FrankW134: Different sized hole/setup. Originally Posted By FrankW134: Originally Posted By lil_Sig: Does anybody know if the MP5 full auto selector will work inside of the Rare Breed FRT-RD3 (SEF)? Or do you have to use the rare breed selector that comes with it? Different sized hole/setup. Just to be clear. I'm asking if, The SEF Lower full auto selector that is in the AP5. Will work in place of the FRT-RD3 (SEF) selector? Not if a AMBI selector will work in an SEF. |
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Originally Posted By lil_Sig: Just to be clear. I'm asking if, The SEF Lower full auto selector that is in the AP5. Will work in place of the FRT-RD3 (SEF) selector? Not if a AMBI selector will work in an SEF. The selectors are WAY different |
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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 lil_Sig: Just to be clear. I'm asking if, The SEF Lower full auto selector that is in the AP5. Will work in place of the FRT-RD3 (SEF) selector? Not if a AMBI selector will work in an SEF. The FRT is completely different than any MP5 type selector lever, none will work other than the supplied selector with the FRT. |
I test fired my ambi RBT a couple days ago and I ran into a issue where I couldn't pull the trigger to drop the hammer sometimes. From what I gather they fit rather sloppily in HK housings so I'm guessing when I switch between positions I'm rocking the trigger pack enough that the locking bar isn't being depressed to the proper point of letting the hammer drop. I'm confident that shimming the pack to prevent the rocking will fix the issue. It was fun letting off bursts of subsonics with a suppressor though. 
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Originally Posted By Aphex: I test fired my ambi RBT a couple days ago and I ran into a issue where I couldn't pull the trigger to drop the hammer sometimes. From what I gather they fit rather sloppily in HK housings so I'm guessing when I switch between positions I'm rocking the trigger pack enough that the locking bar isn't being depressed to the proper point of letting the hammer drop. I'm confident that shimming the pack to prevent the rocking will fix the issue. It was fun letting off bursts of subsonics with a suppressor though. Shim the shelf to keep the lower tight to the upper, if there any slop the bolt wont catch and reset the trigger. |
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Originally Posted By FrankW134: Shim the shelf to keep the lower tight to the upper, if there any slop the bolt wont catch and reset the trigger. No shelf (well not a large one anyway) on my Zenith era MKE gun. I'll be placing shims inside the housing to prevent the pack from rocking forward and possibly raise the entire pack up a smidgen if there is enough wiggle room. |
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Originally Posted By chase45: The RB just needs a different trip to work in something bigger I cant get mine to miss a beat in a K or SD Have not tried it in my MP5 yet but I imagine it will be the same So its not just a Ejector Swap to use the Rare Breed in a larger roller delayed? |
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Originally Posted By lil_Sig: So its not just a Ejector Swap to use the Rare Breed in a larger roller delayed? |
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Originally Posted By lil_Sig: So its not just a Ejector Swap to use the Rare Breed in a larger roller delayed? No you will need a new trip lever I put mine in a 53 and the trip blocked the carriers path as its slightly different than the left side of a mp5 carrier All it needs is a new lever though. Not that big of a thing for someone to make or atleast thats the way it appears to me |
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Originally Posted By D_Man: Reading on HKPro, apparently the hammer spring is too light to ignite rifle primers reliably. And those parts cannot be swapped from OEM ones, different design. It appears to be a ar15 hammer spring Wonder if the light strike ones are because they were installed backwards Easy fix if not |
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I have a PTR 9KT on order and don't know a whole lot about mp5 clones, but I'm building this thing out before it even gets here. Stock, suppressor, locking piece all ordered. Will the non ambi (SEF) drop in these or will there be issues? |
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Originally Posted By JonLSU: I have a PTR 9KT on order and don't know a whole lot about mp5 clones, but I'm building this thing out before it even gets here. Stock, suppressor, locking piece all ordered. Will the non ambi (SEF) drop in these or will there be issues? Yep |
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Originally Posted By JonLSU: I have a PTR 9KT on order and don't know a whole lot about mp5 clones, but I'm building this thing out before it even gets here. Stock, suppressor, locking piece all ordered. Will the non ambi (SEF) drop in these or will there be issues? @JonLSU Yes it will, but… You probably know this, but save yourself some potential grief. Take your PTR out and run a few hundred rounds through it before you change anything and certainly before you SBR it. Several users have purchased MP5 pistols and SBR’d them without even firing a shot. (Not just PTRs but any gun.) I had a PTR that I would not have sold had I known FRTs were only a few months away. BUT I had issues with the gun in the first few mags. PTR sent a paid shipping label and had the repaired gun back in my hands in a couple of weeks. (Much better service than I got when my new POF full sized MP5 had issues, or my replacement MP5K clone AP5-P had a problem.) The PTR was awesome after it was repaired and I would still have it had FRTs been available. I think they replaced the barrel. That would have been a big deal if I had already had it engraved, and decided I wasn’t happy with it. Their customer service (a couple of years ago) was first rate. Sorry for the thread derail. |
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Got the ambi installed in my AP5P clone. First two mags were problematic. Each time I shot a short burst the trigger would lock up and had to cycle the action to get it to shoot again. I sprayed the gun down with CLP and went back to my range and did not have any more issues. The first two mags I was using some bulk remanufactured crap ammo. After that I used some 124 grain factory ammo. Prior to the Rare Breed I had one of the super safety 3D printed units on it. While it worked great, I did not feel it was robust enough for long term usage. |
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Originally Posted By mini14jac: @JonLSU Yes it will, but… You probably know this, but save yourself some potential grief. Take your PTR out and run a few hundred rounds through it before you change anything and certainly before you SBR it. Several users have purchased MP5 pistols and SBR’d them without even firing a shot. (Not just PTRs but any gun.) I had a PTR that I would not have sold had I known FRTs were only a few months away. BUT I had issues with the gun in the first few mags. PTR sent a paid shipping label and had the repaired gun back in my hands in a couple of weeks. (Much better service than I got when my new POF full sized MP5 had issues, or my replacement MP5K clone AP5-P had a problem.) The PTR was awesome after it was repaired and I would still have it had FRTs been available. I think they replaced the barrel. That would have been a big deal if I had already had it engraved, and decided I wasn’t happy with it. Their customer service (a couple of years ago) was first rate. Sorry for the thread derail. Thanks for the advice. I plan on SBR'ing it but I'm not in that big of a rush to get all that done. |
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Originally Posted By lil_Sig: Question, how are you supposed to loosen the selector detent and re-snug it after install like in the installation video with all that red lock tight on it? Have you tried to remove it? I think it's Vibra-Tite or something similar which is no problem at all to loosen/tighten. Mine moves no problem. |
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Originally Posted By acrocat: Have you tried to remove it? I think it's Vibra-Tite or something similar which is no problem at all to loosen/tighten. Mine moves no problem. Originally Posted By acrocat: Originally Posted By lil_Sig: Question, how are you supposed to loosen the selector detent and re-snug it after install like in the installation video with all that red lock tight on it? Have you tried to remove it? I think it's Vibra-Tite or something similar which is no problem at all to loosen/tighten. Mine moves no problem. Thanks, I haven't tried. When I received mine. The 1/16" Dog Screw that has to be removed in order the lift the Trip Bar to install the Ejector Bar. Already had a stripped out Allen head. So Rare Breed is supposed to be sending me a replacement Dog Screw. In hopes I can epoxy a allen wrench into the on that is in it. If it isn't over torqued in to much and get it removed. So I wanted to see what others could tell me they found on what looked like a possible future issue. |
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Just put the rd3 ambi in my ap5-p navy lower and i had to use a nickel as a shim under the front of the trigger in the housing because there was too much tilt/play and the bolt carrier wasn’t able to hit the locking bar to even do a function test. After shim it function tested good and so far just ran one mag of AE 147gr through it real quick no problems. |
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Originally Posted By lil_Sig: Thanks, I haven't tried. When I received mine. The 1/16" Dog Screw that has to be removed in order the lift the Trip Bar to install the Ejector Bar. Already had a stripped out Allen head. So Rare Breed is supposed to be sending me a replacement Dog Screw. In hopes I can epoxy a allen wrench into the on that is in it. If it isn't over torqued in to much and get it removed. So I wanted to see what others could tell me they found on what looked like a possible future issue. See if you can find a Torx bit that will fit. Works as a good extraction tool for stripped Allen heads. |
| Finally had a chance to fire with the FRT, and need to figure out where the issue lies. Dry firing the trigger is smooth as butter in both positions, with a chambered round it acts as if the safety is engaged until you get to around 45lbs pull weight, then it will fire. AP5-SD with B&T SD barrel for reference. |
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Originally Posted By Joguwa86: The chambered round is probably lifting your bolt head and carrier up just the tiniest amount, causing the trip to disengage. I had to shim my RB trigger pack to get it to function. It was just barely not contacting the carrier when in battery. After disassembling the gun, I think I have the same issue as Aphex posted above. I cut some shims from a pellegrino bottle and the fit is much tighter. I dont have any snap caps, but the hammer drops fine now on empty brass. I'll shoot it again in the morning and see if that fixes the issue. *EDIT Shot flawlessly today, 200rds down the pipe without a hiccup. Shooting a steel challenge next weekend. |
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I needed to shim my AP5SD Navy Lower as well - cut a section out of a plastic 22LR box. Left it big enough to friction fit, and sanded it a bit to get the right amount of shim. Ran great and was a blast on steel. When I used my MKE SEF lower on the AP5SD, no shim was needed. So it appears to be a MKE Navy tolerance issue, easily remedied. |
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| From reading posts on shooters that are having issues with the MP5 Rare Breed, I think it’s only an issue with Non-HK trigger housings. I’ve installed two Rare Breed MP5 triggers in Factory HK housings and they ran with zero issues. |
"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: From reading posts on shooters that are having issues with the MP5 Rare Breed, I think it’s only an issue with Non-HK trigger housings. I’ve installed two Rare Breed MP5 triggers in Factory HK housings and they ran with zero issues. Not true in my case. I am using a legit HK 4 pos ambi housing on a Zenith era MKE and still had a couple "dead trigger" moments. I have shimmed mine since then and plan on hitting the range tomorrow to see if it reoccurs. Edit: Range day went perfect no further dead trigger issues after shimming. |
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Maybe we could try to narrow down the issue. Has anyone had to shim the SEF trigger? It seems like a lot of reports are about the ambi model. I’ve installed two Rare Breed SEF models in factory HK housings. One housing was purchased used, installed in a POF full size MP5. No issues. For my K sized AP5-P I got a housing from HK Parts that seems to have been a factory second. User reviews said that the housings needed a lot of “fitting”. That’s unusual for an H&K trigger housing unless your gun is a little out of spec, right? I had to file the front and rear pin holes a lot to get it to fit. It’s still really tight. I have to tap the pins in/out with a mallet. If anything was going to give me a problem I would have thought this one would. Nope. Runs like a top. So, my score: Two SEF triggers, two HK housings, no shims needed. |
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Originally Posted By mini14jac: Maybe we could try to narrow down the issue. Has anyone had to shim the SEF trigger? It seems like a lot of reports are about the ambi model. I’ve installed two Rare Breed SEF models in factory HK housings. One housing was purchased used, installed in a POF full size MP5. No issues. For my K sized AP5-P I got a housing from HK Parts that seems to have been a factory second. User reviews said that the housings needed a lot of “fitting”. That’s unusual for an H&K trigger housing unless your gun is a little out of spec, right? I had to file the front and rear pin holes a lot to get it to fit. It’s still really tight. I have to tap the pins in/out with a mallet. If anything was going to give me a problem I would have thought this one would. Nope. Runs like a top. So, my score: Two SEF triggers, two HK housings, no shims needed. Out spec like having a denial ledge on the back of the magwell? I had to file the slot on my HK trigger housing to not bind up on mine. Push Pins were removable by hand afterwards. |
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I had to open the gap between the front holes where the pin goes through. I also had to open the slot for the denial block on the back of the mag release. These were factory HK MP5 Ambi 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
Rare Breed Triggers has developed a MP5 Trigger (Page 2 of 3)
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