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Posted: 11/10/2017 9:27:13 PM EDT
[#1]
Quote HistoryOriginally Posted By pezboytate:
Please post any info you can get after you receive it. A useful dimension would be how far in front of the gas block the rear of the suppressor is. Quote HistoryOriginally Posted By pezboytate:
Originally Posted By Outrider:
Originally Posted By pezboytate:
I don't think it will work with the AEM5 or AEM2/3/4 on a 7.5" pistol or 10.5" carbine barrel. Looking at my measurements, the Spike's mount seems to be 5/8" shorter than the AEM5 and 3/8" shorter than the AEM2/3/4. It may work on an 8.125" pistol, 11.125" carbine, 13.125" mid length, or 16.5" rifle barrel with the AEM5 or a 7.875" pistol, 10.875" carbine, 12.875" mid length, or 16.25" rifle barrel with the AEM2/3/4. My favorite 5.56 can I own is my AEM5 so figuring out how short I can go is something I look forward to. |
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Posted: 11/10/2017 9:37:47 PM EDT
[#2]
Quote HistoryOriginally Posted By ehudbengera:
I was reading the earlier pages of this thread and it appears that Spikes gas block works for the AEM2/3/4 but not the 5 with a 7.5" pistol length or 10.5" carbine. Info is on page 3. It did hit me that a 8.5" or whatever length would work .300 BLK pistol gas with the Spikes gas block and AEM30 or AEM5 in .30 would be a pretty slick setup.I bet it would be scary quiet too with subsonic pills. |
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Posted: 11/10/2017 10:44:42 PM EDT
[#3]
Quote HistoryOriginally Posted By Outrider:
I saw that information too but it has been a while. I think there's something in the 11.5ish range that may be doable. My gas block should be here tomorrow so I'll try to get some measurements this weekend and put our collective brains together on what the shortest AEM5 configuration is. It did hit me that a 8.5" or whatever length would work .300 BLK pistol gas with the Spikes gas block and AEM30 or AEM5 in .30 would be a pretty slick setup.I bet it would be scary quiet too with subsonic pills. Quote HistoryOriginally Posted By Outrider:
Originally Posted By ehudbengera:
I was reading the earlier pages of this thread and it appears that Spikes gas block works for the AEM2/3/4 but not the 5 with a 7.5" pistol length or 10.5" carbine. Info is on page 3. It did hit me that a 8.5" or whatever length would work .300 BLK pistol gas with the Spikes gas block and AEM30 or AEM5 in .30 would be a pretty slick setup.I bet it would be scary quiet too with subsonic pills. The other question would be what length middy barrel you could use that gas block with. I still am curious, cause I'm sure I'll end up trying to throw a custom upper together eventually 
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NC, USA
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Posted: 11/10/2017 11:14:11 PM EDT
[#4]
Quote HistoryOriginally Posted By ehudbengera:
Yeah but the point of that gas block (for me) was to be able to use a barrel with no custom work being done. I mean I can still use the AEM5 M4 collar on a 12.5" barrel but still. The other question would be what length middy barrel you could use that gas block with. I still am curious, cause I'm sure I'll end up trying to throw a custom upper together eventually |
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Posted: 11/10/2017 11:22:31 PM EDT
[#5]
Quote HistoryOriginally Posted By SpyHawk:
Well, a mid-length gas port is 2" past carbine. So a 12.5" should have the same muzzle to gas port distance as a 10.5" carbine. One would think that one of the 12.5" middys on the market like the one from Triarc would work perfectly with the Spikes Gas Block. |
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Posted: 11/11/2017 12:03:42 AM EDT
[#6]
Quote HistoryOriginally Posted By SpyHawk:
Well, a mid-length gas port is 2" past carbine. So a 12.5" should have the same muzzle to gas port distance as a 10.5" carbine. One would think that one of the 12.5" middys on the market like the one from Triarc would work perfectly with the Spikes Gas Block. Quote HistoryOriginally Posted By SpyHawk:
Originally Posted By ehudbengera:
Yeah but the point of that gas block (for me) was to be able to use a barrel with no custom work being done. I mean I can still use the AEM5 M4 collar on a 12.5" barrel but still. The other question would be what length middy barrel you could use that gas block with. I still am curious, cause I'm sure I'll end up trying to throw a custom upper together eventually |
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Posted: 11/12/2017 7:56:11 AM EDT
[#7]
Does anyone know where, besides ADCO, one could find the compatible flash hider (birdcage-like)? I've been keeping an eye out and it seems they are never in stock when I look.
I have a few projects (SBRs) that I'd like to use the AEM5 with, but definitely don't want to use the normal brake on. |
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Posted: 11/12/2017 9:47:11 AM EDT
[#8]
Quote HistoryOriginally Posted By ehudbengera:
Yes, but that still won't work with the AEM5. I'm not sure what the dimensional difference is between the two mounting systems, so I don't know what barrel length you would need for that. Quote HistoryOriginally Posted By ehudbengera:
Originally Posted By SpyHawk:
Originally Posted By ehudbengera:
Yeah but the point of that gas block (for me) was to be able to use a barrel with no custom work being done. I mean I can still use the AEM5 M4 collar on a 12.5" barrel but still. The other question would be what length middy barrel you could use that gas block with. I still am curious, cause I'm sure I'll end up trying to throw a custom upper together eventually |
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CA, USA
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Posted: 11/12/2017 2:43:17 PM EDT
[#9]
On the M4 style suppressors(AEM2, AEM3, AEM4) starting from the muzzle. Move rearward to where the threads on the muzzle brake start, from there to where the 20 deg taper starts should ideally be 2.06". From the same start point(front of thread) to the rear of the mounted suppressor will be 2.15".
Using the same method with an AEM5, AEM5-30, and AE30, the distance from the start of the thread to the start of the taper should be 2.5". The rear of the suppressor should be at 2.6". |
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Posted: 11/12/2017 3:18:21 PM EDT
[#10]
Quote HistoryOriginally Posted By k31user:
On the M4 style suppressors(AEM2, AEM3, AEM4) starting from the muzzle. Move rearward to where the threads on the muzzle brake start, from there to where the 20 deg taper starts should ideally be 2.06". From the same start point(front of thread) to the rear of the mounted suppressor will be 2.15". Using the same method with an AEM5, AEM5-30, and AE30, the distance from the start of the thread to the start of the taper should be 2.5". The rear of the suppressor should be at 2.6". My Spikes gas block/collar was delayed until tomorrow. I’ll try to get a measurement up and with Ron’s information we ought to be able to fine tune numbers. |
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NC, USA
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Posted: 11/12/2017 3:33:07 PM EDT
[#11]
Quote HistoryOriginally Posted By A_Friendly_Manatee:
There are some factory 13.7" midlength barrels out there. Maybe those would work? Quote HistoryOriginally Posted By A_Friendly_Manatee:
Originally Posted By ehudbengera:
Originally Posted By SpyHawk:
Originally Posted By ehudbengera:
Yeah but the point of that gas block (for me) was to be able to use a barrel with no custom work being done. I mean I can still use the AEM5 M4 collar on a 12.5" barrel but still. The other question would be what length middy barrel you could use that gas block with. I still am curious, cause I'm sure I'll end up trying to throw a custom upper together eventually |
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CA, USA
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Posted: 11/12/2017 3:53:17 PM EDT
[#12]
Keep in mind that the dim. you mentioned are to the rear of a standard collar. Some of the collars(SPR long collar form example) are nearly 3/4" longer than they have to be. Custom collars can reduce the space required down to only slightly longer than the numbers in my previous post.
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Posted: 11/13/2017 1:09:16 PM EDT
[Last Edit: ehudbengera]
[#13]
You know, I could simplify this by just using the SPR-to-M4 collar on my Recce and buy an AEM4. The AEM4 and AEM5 are the same other than the mount. My rifle isn't a clone of anything so I'm good there. Then I can use the Spikes gas block and a 10.5" carbine barrel with the same suppressor and I'm good to go.
ETA the only thing I would have to change is the collar I have on my Recce. They are only like $20 so NBD. |
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Posted: 11/13/2017 6:03:47 PM EDT
[Last Edit: pezboytate]
[#14]
Quote HistoryOriginally Posted By ehudbengera:
You know, I could simplify this by just using the SPR-to-M4 collar on my Recce and buy an AEM4. The AEM4 and AEM5 are the same other than the mount. My rifle isn't a clone of anything so I'm good there. Then I can use the Spikes gas block and a 10.5" carbine barrel with the same suppressor and I'm good to go. ETA the only thing I would have to change is the collar I have on my Recce. They are only like $20 so NBD. The AEM2/3/4 would also work on a 12.50" mid length and 15.88" rifle barrel. And the AEM5 would work on an 7.95" pistol, 10.95" carbine, 12.95" mid length, and 16.33" rifle barrel. |
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Posted: 11/13/2017 6:14:50 PM EDT
[Last Edit: pezboytate]
[#15]
Quote HistoryOriginally Posted By k31user:
Keep in mind that the dim. you mentioned are to the rear of a standard collar. Some of the collars(SPR long collar form example) are nearly 3/4" longer than they have to be. Custom collars can reduce the space required down to only slightly longer than the numbers in my previous post. The AEM5 mounts .50" farther over the barrel than the AEM2/3/4? |
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CA, USA
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Posted: 11/13/2017 7:12:01 PM EDT
[#16]
Quote HistoryOriginally Posted By pezboytate:
@k31user The AEM5 mounts .50" farther over the barrel than the AEM2/3/4? |
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Posted: 11/13/2017 8:30:39 PM EDT
[#17]
Quote HistoryOriginally Posted By k31user:
.45". Quote HistoryOriginally Posted By k31user:
Originally Posted By pezboytate:
@k31user The AEM5 mounts .50" farther over the barrel than the AEM2/3/4? |
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Posted: 11/14/2017 6:39:44 PM EDT
[Last Edit: Outrider]
[#18]
I'm no machinist but this is what I measured last night. Let me know if there is anything in particular you guys are looking for. Hopefully this information is accurate.
So based on Ron's information below we could get away with a 11.15" barrel? 2.5"- 1.65" = 0.85" + 10.3" = 11.15". No timing of the brake was done so I guess some shims could increase length slightly to make a barrel length closer to 11" even. As a side note, @k31user what is the ideal amount of muzzle, if any, so be sticking out of the brake? Adding more shims to the brake should increase the length between the brake and collar allowing more turns of the can before bottoming out on the collar correct? How about ideal # of turns? I've always heard 6-9 is preferred. 
Quote HistoryOriginally Posted By k31user:
On the M4 style suppressors(AEM2, AEM3, AEM4) starting from the muzzle. Move rearward to where the threads on the muzzle brake start, from there to where the 20 deg taper starts should ideally be 2.06". From the same start point(front of thread) to the rear of the mounted suppressor will be 2.15". Using the same method with an AEM5, AEM5-30, and AE30, the distance from the start of the thread to the start of the taper should be 2.5". The rear of the suppressor should be at 2.6". |
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Posted: 11/14/2017 6:54:26 PM EDT
[#19]
Quote HistoryOriginally Posted By Outrider:
I'm no machinist but this is what I measured last night. Let me know if there is anything in particular you guys are looking for. Hopefully this information is accurate.
https://i.imgur.com/wCC72mC.jpg So based on Ron's information below we could get away with a 11.15" barrel? 2.5"- 1.65" = 0.85" + 10.3" = 11.15". No timing of the brake was done so I guess some shims could increase length slightly to make a barrel length closer to 11" even. As a side note, @k31user what is the ideal amount of muzzle, if any, so be sticking out of the brake? Adding more shims to the brake should increase the length between the brake and collar allowing more turns of the can before bottoming out on the collar correct? How about ideal # of turns? I've always heard 6-9 is preferred. https://i.imgur.com/DyMmUuw.png Quote HistoryOriginally Posted By Outrider:
I'm no machinist but this is what I measured last night. Let me know if there is anything in particular you guys are looking for. Hopefully this information is accurate.
https://i.imgur.com/wCC72mC.jpg So based on Ron's information below we could get away with a 11.15" barrel? 2.5"- 1.65" = 0.85" + 10.3" = 11.15". No timing of the brake was done so I guess some shims could increase length slightly to make a barrel length closer to 11" even. As a side note, @k31user what is the ideal amount of muzzle, if any, so be sticking out of the brake? Adding more shims to the brake should increase the length between the brake and collar allowing more turns of the can before bottoming out on the collar correct? How about ideal # of turns? I've always heard 6-9 is preferred. https://i.imgur.com/DyMmUuw.png Originally Posted By k31user:
On the M4 style suppressors(AEM2, AEM3, AEM4) starting from the muzzle. Move rearward to where the threads on the muzzle brake start, from there to where the 20 deg taper starts should ideally be 2.06". From the same start point(front of thread) to the rear of the mounted suppressor will be 2.15". Using the same method with an AEM5, AEM5-30, and AE30, the distance from the start of the thread to the start of the taper should be 2.5". The rear of the suppressor should be at 2.6". |
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Posted: 11/14/2017 6:58:32 PM EDT
[#20]
Quote HistoryOriginally Posted By ehudbengera:
Hmm that sucks. So it looks like there is no factory barrel you could just stick those parts on. Unless you want to use the Spikes suppressors, I guess. Kind of makes me wish I can an AEM4 for some shorty action. 
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Posted: 11/14/2017 7:46:29 PM EDT
[#21]
Quote HistoryOriginally Posted By Outrider:
Unfortunately I believe that to be true. 12.5" is going to be your best bet for factory options running the AEM5. If you don't mind a custom barrel profile then it appears you can shave another 1.5" or so off. Maybe we could get a group buy on some shortest barrels possible for AEM5? Kind of makes me wish I can an AEM4 for some shorty action. Quote HistoryOriginally Posted By Outrider:
Originally Posted By ehudbengera:
Hmm that sucks. So it looks like there is no factory barrel you could just stick those parts on. Unless you want to use the Spikes suppressors, I guess. Kind of makes me wish I can an AEM4 for some shorty action. If I buy a Toolcraft BCG instead of a BCM for it then I will have money left over for the barrel work lol. |
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Posted: 11/14/2017 7:52:13 PM EDT
[#22]
A 12.5" barrel with FSP will work with an AEM5 with no barrel work or shaving the bayonet lug, as long as I use the M4-AEM5 collar and assuming the step in the barrel is cut to the actual M4 spec. Right?
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Posted: 11/14/2017 8:45:28 PM EDT
[#23]
Quote HistoryOriginally Posted By ehudbengera:
A 12.5" barrel with FSP will work with an AEM5 with no barrel work or shaving the bayonet lug, as long as I use the M4-AEM5 collar and assuming the step in the barrel is cut to the actual M4 spec. Right? |
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Posted: 11/14/2017 8:52:14 PM EDT
[#24]
Quote HistoryOriginally Posted By Outrider:
I had to barely shave the front of the lug to make room for the M4 collar. But yes this setup will work. I recommend Ballistic Advantages offering as not all 12.5s have the M4 cut. Quote HistoryOriginally Posted By Outrider:
Originally Posted By ehudbengera:
A 12.5" barrel with FSP will work with an AEM5 with no barrel work or shaving the bayonet lug, as long as I use the M4-AEM5 collar and assuming the step in the barrel is cut to the actual M4 spec. Right? |
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Posted: 11/14/2017 11:22:59 PM EDT
[#25]
Quote HistoryOriginally Posted By ehudbengera:
BCM does. Anyone know if it is in spec? |
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Posted: 11/14/2017 11:42:07 PM EDT
[#26]
I believe Daniel Defense and BA are the only ones out of the usual suspects to meet the spec right now.
Regarding the 11” or so barrels, after second thought it’s actually not too bad as all you need is a chop and thread. The contour for the AE collar is normally the pricey part of the modification but the gas block takes care of that. I may have to buy a cheap carbine barrel and get it chopped down to try. |
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Posted: 11/15/2017 1:06:59 AM EDT
[#27]
Quote HistoryOriginally Posted By Keyst0ne:
BCM barrels (As of 2014 anyway) are not in spec. The collar to mount the AEM5 to a BCM barrel needs to be 0.2" longer than standard. Had to have a custom collar made to use my AEM5 on my de-FSB'd Kino upper. Quote HistoryOriginally Posted By Keyst0ne:
Originally Posted By ehudbengera:
BCM does. Anyone know if it is in spec? |
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Posted: 11/15/2017 3:39:14 PM EDT
[#28]
Quote HistoryOriginally Posted By Twitchy:
Does anyone know where, besides ADCO, one could find the compatible flash hider (birdcage-like)? I've been keeping an eye out and it seems they are never in stock when I look. I have a few projects (SBRs) that I'd like to use the AEM5 with, but definitely don't want to use the normal brake on. |
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Posted: 11/15/2017 8:08:38 PM EDT
[Last Edit: Engel12626]
[#29]
Quote HistoryOriginally Posted By ehudbengera:
ADCO is the only one I have seen. However, you can get a Smith Vortex flash hider with threads that they advertise are compatible with OPS Inc (and therefore AE) suppressors. Its pretty cheap too. https://www.midwayusa.com/product/965652/smith-enterprise-vortex-flash-hider-1-2-28-thread-with-m22x10-outside-thread-for-ops-inc-suppressor-ar-15-matte |
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Posted: 11/16/2017 10:57:06 AM EDT
[#30]
Well I just bought a BCM 14.5" middy off the EE. Comes with a custom collar. Guy says he sent it to Ron to have it made for his AEM5. I'll probably buy the smith vortex and have it pinned. Hopefully I'll purchase the AEM5 in Feb or Mar and have it by the end of next year.
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CA, USA
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Posted: 11/16/2017 9:09:43 PM EDT
[#31]
Search for pictures of first baffles using Vortex fh.
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Posted: 11/17/2017 8:21:12 AM EDT
[Last Edit: ehudbengera]
[#32]
Quote HistoryOriginally Posted By k31user:
Search for pictures of first baffles using Vortex fh. ETA: And what about the ADCO A1-style flash hider mount? Is it any better? |
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Posted: 11/21/2017 5:53:42 AM EDT
[#33]
Few pages back someone said Ron won't do the warranty if you use the the smith mount not sure if it's true or not but it wouldn't hurt to ask him. I know they work just fine though
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Posted: 11/21/2017 9:57:00 AM EDT
[#34]
Quote HistoryOriginally Posted By ehudbengera:
Is it that bad? Reason I was going to use the Vortex is because this rifle will not be suppressed much, the aem5 is going to live on my 16" that has the brake. The 14.5 will mostly be for shooting fast drills unsuppressed, but I still wanted the ability to use the can if I felt like it. Is the occasional slow firing going to fuck it up that much? ETA: And what about the ADCO A1-style flash hider mount? Is it any better? Quote HistoryOriginally Posted By ehudbengera:
Originally Posted By k31user:
Search for pictures of first baffles using Vortex fh. ETA: And what about the ADCO A1-style flash hider mount? Is it any better? |
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Posted: 11/21/2017 10:28:42 AM EDT
[#35]
Quote HistoryOriginally Posted By Twitchy:
Pretty much what I'm wondering. I want a compatible muzzle device that isn't the brake or the tuning fork like vortex (although I have seen that cut down/shortened). Link |
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NC, USA
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Posted: 11/27/2017 6:55:03 AM EDT
[Last Edit: SpyHawk]
[#36]
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Posted: 11/27/2017 4:44:23 PM EDT
[#37]
7.5" and 10.5" barrels will work with the non-5 suppressor models and the Spike's gas block.
I use a large suppressor shim AND a crush washed on the brake to give it an extra .1-.2" but the suppressors thread on just fine. |
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ME, USA
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Posted: 11/27/2017 11:03:13 PM EDT
[#38]
Ron helped me get eeem
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CA, USA
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Posted: 11/27/2017 11:09:56 PM EDT
[#39]
Quote HistoryOriginally Posted By plante74:
Ron helped me get eeem http://imageshack.com/a/img923/1120/WBfXv5.jpg |
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CA, USA
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Posted: 11/27/2017 11:10:31 PM EDT
[Last Edit: k31user]
[#40]
...............
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ME, USA
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Posted: 11/27/2017 11:22:30 PM EDT
[Last Edit: plante74]
[#41]
Quote HistoryOriginally Posted By k31user:
............... 
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Posted: 12/1/2017 3:07:45 AM EDT
[#42]
That ADCO flash hider looks like exactly what I've been looking for.
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PA, USA
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Posted: 12/31/2017 9:43:13 AM EDT
[Last Edit: artic777]
[#43]
I wasn't interested in suppressors until reading this thread and now I've decided to build an 11.5 sbr and throw the aem4 on it. If I read the post about the distances correctly, the 11.5 DD govt profile with a 9" dd m4 rail should provide enough space to mount it, or am I cutting it a little too close?
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Posted: 12/31/2017 12:04:44 PM EDT
[#44]
What gas block? I can measure my 12.5 when I get home from work but I think if you use a fixed FSB and an 11.5" barrel you may need to take off the bayonet lug.
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PA, USA
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Posted: 12/31/2017 12:31:58 PM EDT
[#45]
It's a low pro gas block pinned by the factory, no fsb
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NC, USA
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Posted: 1/1/2018 7:28:15 PM EDT
[#46]
Are you talking about the DD MK18 rail? That's like 9.35". That is probably too long for an 11.5" barrel.
Most manufacturers list the actual length, you'll need to confirm it. |
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PA, USA
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Posted: 1/1/2018 8:29:34 PM EDT
[#47]
The DDM4 is listed as 9.235". I've read that I need anywhere from 2.2-2.5" from the bare end of the muzzle. I thought I saw somewhere in here that someone with a 10" rail and 12.5 barrel mounted one, but I've been all over the internet looking and don't remember.
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Posted: 1/1/2018 9:57:13 PM EDT
[Last Edit: WillysJeep]
[#48]
Anyone using a BA 18" SPR barrel with adjustable gas block and an AEM5? If so, how much gas were you able to cut out by restricting the gas port, if any? I don't want to waste the money on an adjustable if the BA port size is already on the smaller side and I gain nothing from adjustable. I will be using a full mass BCG and standard rifle length buffer and spring. I use SLR gas blocks on most suppressed AR's (so I have non-adj gas blocks in parts drawer to use) and it makes a difference but I have no experience yet with the AEM5 on a rifle length gas system and rifle length buffer/spring.
I know an adj is not needed, but wondered if they did provide a benefit, albeit potentially small. |
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Posted: 1/3/2018 8:56:45 AM EDT
[#49]
Quote HistoryOriginally Posted By Number0neGun:
That ADCO flash hider looks like exactly what I've been looking for. |
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Posted: 1/3/2018 9:46:32 AM EDT
[#50]
Quote HistoryOriginally Posted By bigbore:
I sell those because there is a demand for them. In my experience, ALL the various flash hider mounts have had a negative effect on accuracy compared to the standard brake. It could just be me, but I only use the brakes on my guns. Quote HistoryOriginally Posted By bigbore:
Originally Posted By Number0neGun:
That ADCO flash hider looks like exactly what I've been looking for. |
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