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Posted: 10/20/2014 10:45:03 AM EDT
[#1]
ADCO will re-profile the barrel how you want it. Any heavy barrel could be profiled that way, and most other barrels could be profiled for a .625 front sight.
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Posted: 10/20/2014 12:23:54 PM EDT
[#2]
Dumb question, what is the F marked front sight? I was looking at these as complete uppers, from PSA (also sold out), and noticed that in the descriptopn. What is the implication of hte F marking. I assume it is something with the height of the sight, but what does that do with my options for rear sights?
Sorry to highjack your thread, but as you mentioned the F marked front, I thought it might be a good place to ask. |
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Posted: 10/20/2014 12:34:51 PM EDT
[#3]
It is my understanding that an "F" marked front sight is to be used on Flat top upper receivers. I suppose it puts the front sight in the correct location to align with an add on iron sight installed on the rail of the A3/A4 upper receiver, flat top.
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Posted: 10/20/2014 12:35:10 PM EDT
[#4]
IIRC F marked front sights are .040 higher, they are for use with detachable carry handle sights and flat top uppers instead of the older A2 style uppers.
Their are aftermarket taller front sight posts that fit non-f marked front sight bases and allow them to more easily zero with detachable carry handles. Often times they are not needed as the original post can screw high enough to zero. |
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Posted: 10/20/2014 3:58:27 PM EDT
[#5]
Quote HistoryQuoted:
ADCO will re-profile the barrel how you want it. Any heavy barrel could be profiled that way, and most other barrels could be profiled for a .625 front sight. I contacted Adco about configuring a barrel like I want, (mock-dissapator). $80 to recontour the barrel $145 to pin the front site base on the barrel. And that's not counting the barrel or parts. That makes having one purposely built cost prohibitive to me. So now I think I'll build an upper with a 16" barrel and a lo-profile gas block in the mid-position and a handguard that goes to the rifle position. I can then have the long sight radius I'm looking for. Not a dissapator, but they seem to be pretty rare. There must not be enough callings for a mock-dissapator??? |
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Posted: 10/20/2014 4:00:46 PM EDT
[#6]
Yeah, Adco isn't the cheapest. Most mine I use a flipup on a 12" rail.
This one is a rifle gas dissipator:  |
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Posted: 10/20/2014 7:43:30 PM EDT
[#7]
Here is my response to a similar question in the Dissapator thread-
It would be expensive to have a barrel reprofiled to have a FSB pinned. A WAY cheaper alternative is the Armalite Clamp on FSB (looks extremely close to a fcatory FSB) or ant of the other several clamp on flip up style FSBs. I Believe the ARMS 41BL would also be slightly cheaper than having a FSB attached and would give the option to be folded down if need be. THere's also the JP A2 adjustable fixed as well as , YHM, and PRI clamp on flip up sights. Couple of my builds- Arnalite: 
YHM: 
PRI (required a little fitting to get it o mount up rock solid): 
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Posted: 10/20/2014 7:52:46 PM EDT
[#8]
I think we need to find a company to make a run of lightweight midlength dissipator barrels and do a group buy.
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Posted: 10/20/2014 8:21:08 PM EDT
[#9]
Quote HistoryQuoted:
I think we need to find a company to make a run of lightweight midlength dissipator barrels and do a group buy. Well, keep me in mind, I'm in with that!! |
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Posted: 10/20/2014 8:26:11 PM EDT
[#10]
Quote HistoryQuoted:
Here is my response to a similar question in the Dissapator thread- It would be expensive to have a barrel reprofiled to have a FSB pinned. A WAY cheaper alternative is the Armalite Clamp on FSB (looks extremely close to a fcatory FSB) or ant of the other several clamp on flip up style FSBs. I Believe the ARMS 41BL would also be slightly cheaper than having a FSB attached and would give the option to be folded down if need be. THere's also the JP A2 adjustable fixed as well as , YHM, and PRI clamp on flip up sights. Couple of my builds- Arnalite: http://i183.photobucket.com/albums/x282/balloo932/SAM_0065.jpg http://i183.photobucket.com/albums/x282/balloo932/SAM_0064.jpg http://i183.photobucket.com/albums/x282/balloo932/SAM_0182-1-1-1.jpg YHM: http://i183.photobucket.com/albums/x282/balloo932/piss8.jpg http://i183.photobucket.com/albums/x282/balloo932/piss5.jpg PRI (required a little fitting to get it o mount up rock solid): http://i183.photobucket.com/albums/x282/balloo932/294a21c7-0d6c-46b2-9ad8-ef209f601957_zps15f0b91f.jpg http://i183.photobucket.com/albums/x282/balloo932/DSC00958-1.jpg Nice rifles indeed! The first rifle is exactly what I want to accomplish. Only I want to use a Magpul MOE hand guard. May I ask you what barrel you used? I never knew a clamp on A2 front sight was even made. Did you have any issues getting a rear sight to work with it? |
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Posted: 10/20/2014 9:38:27 PM EDT
[#11]
Del-ton has a dissapator barrel but it is a full rifle length gas system and "f" marked front sight base. It would do away with having to mount a lo pro and a front sight. I doubt Del-ton would make a barrel that didn't work right
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Posted: 10/20/2014 9:58:06 PM EDT
[#12]
Quote HistoryQuoted:
Del-ton has a dissapator barrel but it is a full rifle length gas system and "f" marked front sight base. It would do away with having to mount a lo pro and a front sight. I doubt Del-ton would make a barrel that didn't work right You are assuming a lot. It's not that the barrel has anything wrong with it, it's the rest of the parts that have to make it work. I have a sbr that has very little dwell time and it is finicky with what you feed it. I would just as soon continue looking for a mock-dissipator barrel. ETA; or make one like the above poster did. Thanks for the input. |
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Posted: 10/20/2014 10:16:37 PM EDT
[#13]
Quote HistoryQuoted: Del-ton has a dissapator barrel but it is a full rifle length gas system and "f" marked front sight base. It would do away with having to mount a lo pro and a front sight. I doubt Del-ton would make a barrel that didn't work right |
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Posted: 10/20/2014 10:27:37 PM EDT
[#14]
Ya I just threw it out there b/c I was contemplating it for a build for the wife but going with a 14.5 instead due to tuning issues like you said. I know on the AR Discussion forum there's a dissipator pic and discussion thread and most of those dudes run a middy.
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Posted: 10/20/2014 10:41:29 PM EDT
[#15]
The first one I did with the Armalite was a STAG arms M4 profile barrel. The thicker part in front of the notch worked with the Armalite sight. I used eth same barrel with a YHM and it worked. I have also used a PSA M4 barrel and a Spike's tactical CAR barrel as well. All worked fine. I centered the rear sight and took it to the range. Shot then loosened the front sight CAREFULLY and tweaked it till it was on target. Once sighted in, I loosened 1 side and ran some red lock tight on the screws then tightened them down.
I never had any issues with it shifting or losing zero. I still have the PRI Dissy set up that uses a CHF PSA midlength gas barrel. My other Dissy uses a CMMG Med-Con (medium contour) Dissy barrel. It wasn't cheap but that the time they were the only game in town for a mid gas 1/7 twist Dissy barrel. Quote HistoryQuoted:
Nice rifles indeed! The first rifle is exactly what I want to accomplish. Only I want to use a Magpul MOE hand guard. May I ask you what barrel you used? I never knew a clamp on A2 front sight was even made. Did you have any issues getting a rear sight to work with it? Quote HistoryQuoted:
Quoted:
Here is my response to a similar question in the Dissapator thread- It would be expensive to have a barrel reprofiled to have a FSB pinned. A WAY cheaper alternative is the Armalite Clamp on FSB (looks extremely close to a fcatory FSB) or ant of the other several clamp on flip up style FSBs. I Believe the ARMS 41BL would also be slightly cheaper than having a FSB attached and would give the option to be folded down if need be. THere's also the JP A2 adjustable fixed as well as , YHM, and PRI clamp on flip up sights. Couple of my builds- Arnalite: http://i183.photobucket.com/albums/x282/balloo932/SAM_0065.jpg http://i183.photobucket.com/albums/x282/balloo932/SAM_0064.jpg http://i183.photobucket.com/albums/x282/balloo932/SAM_0182-1-1-1.jpg YHM: http://i183.photobucket.com/albums/x282/balloo932/piss8.jpg http://i183.photobucket.com/albums/x282/balloo932/piss5.jpg PRI (required a little fitting to get it o mount up rock solid): http://i183.photobucket.com/albums/x282/balloo932/294a21c7-0d6c-46b2-9ad8-ef209f601957_zps15f0b91f.jpg http://i183.photobucket.com/albums/x282/balloo932/DSC00958-1.jpg Nice rifles indeed! The first rifle is exactly what I want to accomplish. Only I want to use a Magpul MOE hand guard. May I ask you what barrel you used? I never knew a clamp on A2 front sight was even made. Did you have any issues getting a rear sight to work with it? |
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Posted: 10/20/2014 11:19:32 PM EDT
[#16]
Baloo93, thanks for all the great info. The barrels I've looked at so far appear to have a step-down to a smaller diameter between the gas block fit and the end of the barrel.
The Armalite sight base I found says it's .750. Are barrel profiles something that all the manufactures keep consistent among the different styles? I was hoping to use a light weight barrel of some sort, as I'm hoping to get my wife interested in shooting it. My current rifles are to heavy, she says. Thanks again, any advice or comments appreciated. |
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Posted: 10/20/2014 11:54:03 PM EDT
[#17]
There is enough clamping area to clamp around a smaller area than the .750 listed. You would have to get a M4 or CAR profile barrel that is A2 or Govt profile under than handguards.
That's about as light as you could get to get a carbine or midlength gas barrel and use a clamp on sight. If you wanted to try a rifle gas Dissy then the VooDoo Dissy barrel might be what you are looking for, just make sure the gas port is large enough. Quote HistoryQuoted:
Baloo93, thanks for all the great info. The barrels I've looked at so far appear to have a step-down to a smaller diameter between the gas block fit and the end of the barrel. The Armalite sight base I found says it's .750. Are barrel profiles something that all the manufactures keep consistent among the different styles? I was hoping to use a light weight barrel of some sort, as I'm hoping to get my wife interested in shooting it. My current rifles are to heavy, she says. Thanks again, any advice or comments appreciated. |
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Posted: 10/21/2014 12:07:15 AM EDT
[#18]
The rifle you used the Armalite front sight , how or what do you use to hold the front hand guard cup on?
Quote HistoryQuoted:
There is enough clamping area to clamp around a smaller area than the .750 listed. You would have to get a M4 or CAR profile barrel that is A2 or Govt profile under than handguards. That's about as light as you could get to get a carbine or midlength gas barrel and use a clamp on sight. If you wanted to try a rifle gas Dissy then the VooDoo Dissy barrel might be what you are looking for, just make sure the gas port is large enough. Quote HistoryQuoted:
There is enough clamping area to clamp around a smaller area than the .750 listed. You would have to get a M4 or CAR profile barrel that is A2 or Govt profile under than handguards. That's about as light as you could get to get a carbine or midlength gas barrel and use a clamp on sight. If you wanted to try a rifle gas Dissy then the VooDoo Dissy barrel might be what you are looking for, just make sure the gas port is large enough. Quoted:
Baloo93, thanks for all the great info. The barrels I've looked at so far appear to have a step-down to a smaller diameter between the gas block fit and the end of the barrel. The Armalite sight base I found says it's .750. Are barrel profiles something that all the manufactures keep consistent among the different styles? I was hoping to use a light weight barrel of some sort, as I'm hoping to get my wife interested in shooting it. My current rifles are to heavy, she says. Thanks again, any advice or comments appreciated. |
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Posted: 10/21/2014 6:46:11 AM EDT
[#19]
I put a roll pin that was slightly larger than the gas tube hole in a drill chuck. I used the drill to spin the roll pin and hit a section of the front with a file to recontour the pin to fit snugly in to the gas tube hole. I put the cap on and then tapped the reshaped roll pin with a small hammer into place to hold the cap still and keep it from shifting.
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Posted: 10/21/2014 7:15:52 PM EDT
[#20]
Quote HistoryQuoted:
I put a roll pin that was slightly larger than the gas tube hole in a drill chuck. I used the drill to spin the roll pin and hit a section of the front with a file to recontour the pin to fit snugly in to the gas tube hole. I put the cap on and then tapped the reshaped roll pin with a small hammer into place to hold the cap still and keep it from shifting. Sounds like a good fix, I'll try it, thanks! |
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Posted: 10/22/2014 10:23:27 AM EDT
[#21]
Well I finally decided on a barrel for my mock-dissipator.
This barrel appears to maintain most of diameter forward of the gas block journal. But I'm hoping the balance of gun isn't to far forward as it looks like the barrel is pretty slim between the barrel nut and the gas block journal???? |
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Posted: 10/22/2014 10:30:52 AM EDT
[#22]
Quote HistoryQuoted: Well I finally decided on a barrel for my mock-dissipator. This barrel appears to maintain most of diameter forward of the gas block journal. But I'm hoping the balance of gun isn't to far forward as it looks like the barrel is pretty slim between the barrel nut and the gas block journal???? |
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Posted: 10/22/2014 11:16:00 AM EDT
[#23]
I am REALLY struggling with this topic as well.
I'm hell bent on a carbine gas, 12" ALG tube, front sight block, and as close to a 13.7" barrel with pinned KX3 as I can get I'm going to have to btw the bullet and pay adco a fuck ton of money Posted Via AR15.Com Mobile |
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Posted: 10/22/2014 11:38:18 AM EDT
[#24]
Quote HistoryQuoted:
That is similar to a .gov profile barrel. Slim under the hand guards, .750 gas block and usually .730 out front. Quote HistoryQuoted:
Quoted:
Well I finally decided on a barrel for my mock-dissipator. This barrel appears to maintain most of diameter forward of the gas block journal. But I'm hoping the balance of gun isn't to far forward as it looks like the barrel is pretty slim between the barrel nut and the gas block journal???? I hope the clamp on Armalite front site base will tighten on that front part, you say is .730" |
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Posted: 10/22/2014 11:45:33 AM EDT
[#25]
Quote HistoryQuoted: I hope the clamp on Armalite front site base will tighten on that front part, you say is .730" Quote HistoryQuoted: Quoted: SNIP I hope the clamp on Armalite front site base will tighten on that front part, you say is .730" |
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Posted: 10/22/2014 1:11:59 PM EDT
[#26]
Quote HistoryQuoted:
Sounds like a good fix, I'll try it, thanks! Quote HistoryQuoted:
Quoted:
I put a roll pin that was slightly larger than the gas tube hole in a drill chuck. I used the drill to spin the roll pin and hit a section of the front with a file to recontour the pin to fit snugly in to the gas tube hole. I put the cap on and then tapped the reshaped roll pin with a small hammer into place to hold the cap still and keep it from shifting. Sounds like a good fix, I'll try it, thanks! A tap and screw? |
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Posted: 10/22/2014 1:18:43 PM EDT
[#27]
Quote HistoryQuoted:
I am REALLY struggling with this topic as well. I'm hell bent on a carbine gas, 12" ALG tube, front sight block, and as close to a 13.7" barrel with pinned KX3 as I can get I'm going to have to btw the bullet and pay adco a fuck ton of money Posted Via AR15.Com Mobile As overdriv said, use a govt profile, and that Armalite base. If it won't clamp, you can file open the gap to close more, or shim it some. If you do decide to go Adco, you are only reprofiling the front, so it's only $80, with refinishing. |
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Posted: 10/22/2014 7:02:55 PM EDT
[#28]
Quote HistoryQuoted:
As overdriv said, use a govt profile, and that Armalite base. If it won't clamp, you can file open the gap to close more, or shim it some. If you do decide to go Adco, you are only reprofiling the front, so it's only $80, with refinishing. Quote HistoryQuoted:
Quoted:
I am REALLY struggling with this topic as well. I'm hell bent on a carbine gas, 12" ALG tube, front sight block, and as close to a 13.7" barrel with pinned KX3 as I can get I'm going to have to btw the bullet and pay adco a fuck ton of money Posted Via AR15.Com Mobile As overdriv said, use a govt profile, and that Armalite base. If it won't clamp, you can file open the gap to close more, or shim it some. If you do decide to go Adco, you are only reprofiling the front, so it's only $80, with refinishing. and pin the FSB, and barrel cut and pin/weld muzzle devise, and built the upper. So $80 turned into like $350 PDQ I need to look into the armalite option. |
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Posted: 10/22/2014 10:03:13 PM EDT
[#29]
I have a 16" carbine gas colt barrel in the white that is .740 from the gas port to the muzzle.
The $45 clamp on armalite FSB looks promising. |
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Posted: 10/23/2014 10:41:39 AM EDT
[#30]
Well if some of you guys are interested in this, stick around because I have parts inbound and will report back with pictures.
I assembled my lower last evening and found out I don't have/didn't get, a trigger guard floor. I thought they came with the lower parts kit. |
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Posted: 10/23/2014 10:53:25 AM EDT
[#31]
Quote HistoryQuoted: Well if some of you guys are interested in this, stick around because I have parts inbound and will report back with pictures. I assembled my lower last evening and found out I don't have/didn't get, a trigger guard floor. I thought they came with the lower parts kit. |
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Posted: 10/23/2014 4:40:06 PM EDT
[#32]
Quote HistoryQuoted:
Normally they do. Quote HistoryQuoted:
Quoted:
Well if some of you guys are interested in this, stick around because I have parts inbound and will report back with pictures. I assembled my lower last evening and found out I don't have/didn't get, a trigger guard floor. I thought they came with the lower parts kit. Yeah, that's what I thought too. I gave them a call and one was sent out today, he said. |
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