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FL, USA
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Posted: 7/31/2019 11:54:10 AM EST
[#1]
Quote HistoryOriginally Posted By Coldsnap:
might have been answered, was the gas block restricted on the mk12 block as well? |
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FL, USA
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Posted: 7/31/2019 7:45:47 PM EST
[#2]
Quote HistoryOriginally Posted By Coldsnap:
might have been answered, was the gas block restricted on the mk12 block as well? the smaller port G gas block was from a 14.5", not sure on the 10.3 gb |
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Posted: 7/31/2019 8:38:46 PM EST
[Last Edit: pezboytate]
[#3]
Quote HistoryOriginally Posted By nhojyelbom:
looked standard mk12 to me, i parted my urgi's out and have the mk12 on a MK18 build now. the smaller port G gas block was from a 14.5", not sure on the 10.3 gb Quote HistoryOriginally Posted By nhojyelbom:
Originally Posted By Coldsnap:
might have been answered, was the gas block restricted on the mk12 block as well? the smaller port G gas block was from a 14.5", not sure on the 10.3 gb |
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Posted: 7/31/2019 8:39:57 PM EST
[#4]
@combat_diver
Do the issued URG-Is have a Mk12 gas block, Geissele gas block, or restricted Geissele gas block? |
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Posted: 7/31/2019 8:53:15 PM EST
[#5]
Quote HistoryOriginally Posted By pezboytate:
@combat_diver Do the issued URG-Is have a Mk12 gas block, Geissele gas block, or restricted Geissele gas block? |
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USA
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Posted: 7/31/2019 10:15:47 PM EST
[Last Edit: delta_romeo_echo]
[#6]
I've read on the FBI clone thread about the HRT rifles that have a restricted gas block. My guess is they do that and then run a carbine or H buffer? I thought someone said you can call G and request one?? A few guys on that thread have gone with the BRT CustomTUNE gas port.
I got the "full clone" upper but swapped the MK12 GB out for a G GB. It's full size and came "free" with the MK16 rail I ordered during the Black Friday Sale "one time only" (yeah right). The MK12 went on my 10.3 Block II build which has a DD barrel. I didn't look but I assume it was full size as well. It runs and ejects perfectly with a H1 buffer, think the gas port was ~.068" I did not measure the gas port on the 14.5 full clone barrel before I installed the G GB. Sort of wishing I did because its pinned now! I know, overkill. I'm curious as to why they would supply the restricted GB on the "near clone" version only? Are the gas ports on that barrel larger so they make up for it with the GB? Now I want one just cause they are hard to find 
Pic thread: 
Almost done, just need a lower and optic. Going coyote on this build. (edit) Not sure I'll keep the VFG, was in my spares so I tossed it on there. |
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Posted: 7/31/2019 11:19:52 PM EST
[#7]
Quote HistoryOriginally Posted By pezboytate:
@combat_diver Do the issued URG-Is have a Mk12 gas block, Geissele gas block, or restricted Geissele gas block? CD |
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Posted: 7/31/2019 11:20:49 PM EST
[#8]
Quote HistoryOriginally Posted By delta_romeo_echo:
I've read on the FBI clone thread about the HRT rifles that have a restricted gas block. My guess is they do that and then run a carbine or H buffer? I thought someone said you can call G and request one?? A few guys on that thread have gone with the BRT CustomTUNE gas port. I got the "full clone" upper but swapped the MK12 GB out for a G GB. It's full size and came "free" with the MK16 rail I ordered during the Black Friday Sale "one time only" (yeah right). The MK12 went on my 10.3 Block II build which has a DD barrel. I didn't look but I assume it was full size as well. It runs and ejects perfectly with a H1 buffer, think the gas port was ~.068" I did not measure the gas port on the 14.5 full clone barrel before I installed the G GB. Sort of wishing I did because its pinned now! I know, overkill. I'm curious as to why they would supply the restricted GB on the "near clone" version only? Are the gas ports on that barrel larger so they make up for it with the GB? Now I want one just cause they are hard to find
Pic thread: https://i.imgur.com/1IkRnGd.jpg Almost done, just need a lower and optic. Going coyote on this build. (edit) Not sure I'll keep the VFG, was in my spares so I tossed it on there. CD |
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USA
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Posted: 7/31/2019 11:53:34 PM EST
[#9]
Received this today from Geissele...
Thank you for contacting us. We do not commercially have a SGB in a reduced port sizing. I can certainly pass your request forward for the future. If I can be of further assistance, please let me know. Thank you, Jay Geissele Automatics Sales Management Team |
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Posted: 8/1/2019 12:02:22 AM EST
[#10]
Quote HistoryOriginally Posted By delta_romeo_echo:
I've read on the FBI clone thread about the HRT rifles that have a restricted gas block. My guess is they do that and then run a carbine or H buffer? I thought someone said you can call G and request one?? A few guys on that thread have gone with the BRT CustomTUNE gas port. I got the "full clone" upper but swapped the MK12 GB out for a G GB. It's full size and came "free" with the MK16 rail I ordered during the Black Friday Sale "one time only" (yeah right). The MK12 went on my 10.3 Block II build which has a DD barrel. I didn't look but I assume it was full size as well. It runs and ejects perfectly with a H1 buffer, think the gas port was ~.068" I did not measure the gas port on the 14.5 full clone barrel before I installed the G GB. Sort of wishing I did because its pinned now! I know, overkill. I'm curious as to why they would supply the restricted GB on the "near clone" version only? Are the gas ports on that barrel larger so they make up for it with the GB? Now I want one just cause they are hard to find
Pic thread: https://i.imgur.com/1IkRnGd.jpg Almost done, just need a lower and optic. Going coyote on this build. (edit) Not sure I'll keep the VFG, was in my spares so I tossed it on there. |
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FL, USA
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Posted: 8/1/2019 12:28:29 AM EST
[Last Edit: nhojyelbom]
[#11]
Quote HistoryOriginally Posted By duke23433: Let me know how it shoots with the regular G gas block, I'm in the same boat of going to take off the mk 12 for a block II build and now have a dilemma of using a regular G block or trying to source a restricted one |
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WA, USA
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Posted: 8/1/2019 4:17:28 AM EST
[Last Edit: DDS87]
[#12]
Black River Tactical makes gas block inserts just for this purpose.
You will need the kit to tap the current gas block to accept the insert. I've done two different gas blocks, no drilling required, and it was super easy and effective. Edit: I had the relationship between the BRT insert port size and barrel port size backwards. The size of a given BRT insert port roughly translates to the next highest barrel gas port size. |
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USA
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Posted: 8/1/2019 9:41:49 AM EST
[#13]
Quote HistoryOriginally Posted By duke23433:
Let me know how it shoots with the regular G gas block, I'm in the same boat of going to take off the mk 12 for a block II build and now have a dilemma of using a regular G block or trying to source a restricted one |
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Posted: 8/1/2019 12:23:44 PM EST
[#14]
Quote HistoryOriginally Posted By DDS87:
Black River Tactical makes gas block inserts just for this purpose. The size of the insert probably replicates the next lowest size in effect because of the additional interference of having the insert. You will need the kit to tap the current gas block to accept the insert. I've done two different gas blocks, no drilling required, and it was super easy and effective. |
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Posted: 8/1/2019 12:26:56 PM EST
[Last Edit: duke23433]
[#15]
Starting a small petition in the G forum for restricted gas blocks...
For those who would be interested in purchasing one, If you wouldn’t mind posting and adding to the count it would be appreciated! https://www.ar15.com/forums/industry/Restricted-SGB/444-292962/ |
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MI, USA
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Posted: 8/1/2019 8:42:36 PM EST
[Last Edit: Quattr09]
[#16]
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Posted: 8/1/2019 10:55:03 PM EST
[#17]
Quote HistoryOriginally Posted By Quattr09: Assuming these are JBLM-based ODAs? CD |
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WA, USA
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Posted: 8/2/2019 10:16:17 AM EST
[#18]
Quote HistoryOriginally Posted By duke23433:
Starting a small petition in the G forum for restricted gas blocks... For those who would be interested in purchasing one, If you wouldn’t mind posting and adding to the count it would be appreciated! https://www.ar15.com/forums/industry/Restricted-SGB/444-292962/ |
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Posted: 8/2/2019 10:26:34 AM EST
[Last Edit: duke23433]
[#19]
Quote HistoryOriginally Posted By Recce_Gear:
Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? Quote HistoryOriginally Posted By Recce_Gear:
Originally Posted By duke23433:
Starting a small petition in the G forum for restricted gas blocks... For those who would be interested in purchasing one, If you wouldn’t mind posting and adding to the count it would be appreciated! https://www.ar15.com/forums/industry/Restricted-SGB/444-292962/ 
Also I have no experience with BRT and still waiting on a range report from a few posts up. Also being clone correct is always nice. Plus Geissele may not know the demand for the RGB so I don’t see any harm in broadcasting that demand |
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Posted: 8/2/2019 10:34:10 AM EST
[#20]
Quote HistoryOriginally Posted By Recce_Gear: Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? |
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Posted: 8/2/2019 10:41:49 AM EST
[#21]
Quote HistoryOriginally Posted By Recce_Gear: Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? |
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Posted: 8/2/2019 11:21:27 AM EST
[#22]
Quote HistoryOriginally Posted By sagmill:
That's news to me. If they "leaked" our customer service dept would have been all over it. Quote HistoryOriginally Posted By sagmill:
Originally Posted By Recce_Gear: Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? Send me a few for testing and I can verify this
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Posted: 8/2/2019 12:06:19 PM EST
[#23]
Quote HistoryOriginally Posted By Recce_Gear: Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? 
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Posted: 8/2/2019 12:22:31 PM EST
[Last Edit: GreasyEasy]
[#24]
Quote HistoryOriginally Posted By Recce_Gear: Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? |
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WA, USA
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Posted: 8/2/2019 12:26:05 PM EST
[Last Edit: Recce_Gear]
[#25]
This will happen with any gas block where there is a variance in either the gas tube fit or barrel journal size. It isn't just specific to the G blocks, but it does and has happened regardless of whether the block has been pinned, uses set screws, clamps, etc. It is the nature of tolerances and manufacturing processes. Most people will probably never notice either one, but hey, call it BS all you want, because that doesn't make my comment misleading, false or untrue.
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Posted: 8/2/2019 12:45:04 PM EST
[#26]
Originally Posted By Recce_Gear:
Why would you do this, when the G block has several, well known issues, with the biggest one being that it leaks like a broken faucet, and BRT makes inexpensive inserts that flat out work? Originally Posted By Recce_Gear:
This will happen with any gas block where there is a variance in either the gas tube fit or barrel journal size. It isn't just specific to the G blocks, but it does and has happened regardless of whether the block has been pinned, uses set screws, clamps, etc. It is the nature of tolerances and manufacturing processes. Most people will probably never notice either one, but hey, call it BS all you want, because that doesn't make my comment false or untrue. |
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Posted: 8/2/2019 12:47:02 PM EST
[#27]
Quote HistoryOriginally Posted By Recce_Gear:
This will happen with any gas block where there is a variance in either the gas tube fit or barrel journal size. It isn't just specific to the G blocks, but it does and has happened regardless of whether the block has been pinned, uses set screws, clamps, etc. It is the nature of tolerances and manufacturing processes. Most people will probably never notice either one, but hey, call it BS all you want, because that doesn't make my comment false or untrue. And if anyone ever is concerned that they have problems with their Geissele stuff, our customer service guys are just a phone call away to take care of them. Now that I think about it we were aware of a leaking gas block not too long ago. The picture the customer sent in looked real bad. The upper was sent in with gas fouling all over the rail. The gas block was removed and found to be good, the barrel journal also was good. It turns out his suppressor was leaking gas backward and made it look like it was a gas block problem. We are always there to help our fellow shooters out. |
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Posted: 8/2/2019 6:31:00 PM EST
[#28]
Took a while, but finally completed my non issued clonesque 10.3" build. Hopefully go zero it this weekend.
 Attached File Attached FileAlways have to downgrade the image quality to post a pic, and I'm no photographer. 
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Posted: 8/2/2019 6:41:13 PM EST
[#29]
Thanks a nice set up there.
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Posted: 8/2/2019 11:46:14 PM EST
[#30]
So after some inspection of my clone and near clone 10.3 upper notices a few things.
1) the Mk12 Gas block has been altered with relief cuts to give extra clearance room 2) the G block is actually closer to the rail on both the top and bottom now due to the relief cuts made on the mk 12 All in all kicking myself for not ordering a pinned and welded upper now because I have no interest in swapping the gas block anymore. But oh well just glad to see G is taking proactive steps to address the clearance issues. Not sure if this is just common knowledge at this point or not but figured I would put it out there! |
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USA
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Posted: 8/3/2019 10:55:54 AM EST
[#31]
Quote HistoryOriginally Posted By duke23433:
So after some inspection of my clone and near clone 10.3 upper notices a few things. 1) the Mk12 Gas block has been altered with relief cuts to give extra clearance room 2) the G block is actually closer to the rail on both the top and bottom now due to the relief cuts made on the mk 12 All in all kicking myself for not ordering a pinned and welded upper now because I have no interest in swapping the gas block anymore. But oh well just glad to see G is taking proactive steps to address the clearance issues. Not sure if this is just common knowledge at this point or not but figured I would put it out there! I plan to run the NF ATACR on this rifle so considering the cost of that optic, I don't plan on dropping it! |
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Posted: 8/3/2019 12:50:47 PM EST
[#32]
Quote HistoryOriginally Posted By delta_romeo_echo:
That's good to know. Thanks for sharing. This solution was suggested in a post some time ago. Glad to see they are taking the time at the factory to address. I put the G block on my 14.5 full clone because it seemed right, it's got G parts everywhere else when possible. Plus I needed a Mk12 for the Block II. I bought the barrel stripped. I plan to run the NF ATACR on this rifle so considering the cost of that optic, I don't plan on dropping it! Quote HistoryOriginally Posted By delta_romeo_echo:
Originally Posted By duke23433:
So after some inspection of my clone and near clone 10.3 upper notices a few things. 1) the Mk12 Gas block has been altered with relief cuts to give extra clearance room 2) the G block is actually closer to the rail on both the top and bottom now due to the relief cuts made on the mk 12 All in all kicking myself for not ordering a pinned and welded upper now because I have no interest in swapping the gas block anymore. But oh well just glad to see G is taking proactive steps to address the clearance issues. Not sure if this is just common knowledge at this point or not but figured I would put it out there! I plan to run the NF ATACR on this rifle so considering the cost of that optic, I don't plan on dropping it! Just gonna buy another mk12 for my block II. Not gonna go through the hassle of swapping if it poses more of a risk and isn’t the restricted gas block. Plus I’ll probably be more clone correct with a mk12 unless the SGBs become the new standard |
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Posted: 8/4/2019 2:22:54 PM EST
[#33]
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel.
CD |
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Posted: 8/4/2019 2:34:18 PM EST
[#34]
Quote HistoryOriginally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD
Thanks for the info, hopefully you can grab some pics at some point. Curious to see how these are being kitted out in the wild. |
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TX, USA
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Posted: 8/4/2019 2:38:36 PM EST
[#35]
Quote HistoryOriginally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD |
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WA, USA
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Posted: 8/4/2019 3:03:16 PM EST
[#36]
Quote HistoryOriginally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD |
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Posted: 8/4/2019 3:06:01 PM EST
[#37]
Well that F’d up my plan lol oh well gonna stick with the mk12 as I want as little clearance issues as possible
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NE, USA
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Posted: 8/4/2019 3:13:25 PM EST
[#38]
Quote HistoryOriginally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD |
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Posted: 8/4/2019 4:09:26 PM EST
[Last Edit: SurtrsFire]
[#39]
shot my 10.3 urgi for the first time today.
gassed myself out, friend shot the next 30rds and gassed herself out
Might try an slr adjustable gas block I guess. It was pretty bad compared to my mod 2 11.5" upper. |
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Posted: 8/4/2019 4:42:30 PM EST
[#40]
Quote HistoryOriginally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD |
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Posted: 8/4/2019 5:31:50 PM EST
[#41]
Quote HistoryOriginally Posted By Infidel4life11:
THIS. IS. AWESOME. Quote HistoryOriginally Posted By Infidel4life11:
Originally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD
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Posted: 8/4/2019 5:47:10 PM EST
[#42]
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Posted: 8/4/2019 6:03:37 PM EST
[Last Edit: duke23433]
[#43]
Quote HistoryOriginally Posted By SurtrsFire:
shot my 10.3 urgi for the first time today. gassed myself out, friend shot the next 30rds and gassed herself out
Might try an slr adjustable gas block I guess. It was pretty bad compared to my mod 2 11.5" upper. ETA: Sent u a PM |
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Posted: 8/4/2019 6:18:23 PM EST
[#44]
Quote HistoryOriginally Posted By MILSPEC556:
I'm guessing you bought the near clone. Quote HistoryOriginally Posted By MILSPEC556:
Originally Posted By Infidel4life11:
Originally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD |
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Posted: 8/4/2019 6:39:50 PM EST
[#45]
Quote HistoryOriginally Posted By Infidel4life11: Let’s just say @5pt56 hook be up with the most awesome bday present ever in ODG. Ima drop it on you guys soon. It’ll be DMR style until I can scope the appropriate optic.
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Posted: 8/4/2019 6:53:16 PM EST
[#46]
Quote HistoryOriginally Posted By 5pt56:
I know a guy that has an optic for you. |
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Posted: 8/4/2019 6:56:34 PM EST
[#47]
Quote HistoryOriginally Posted By SurtrsFire:
shot my 10.3 urgi for the first time today. gassed myself out, friend shot the next 30rds and gassed herself out
Might try an slr adjustable gas block I guess. It was pretty bad compared to my mod 2 11.5" upper. Gonna try the RTV sealant on the charging handle gap and see if that helps.  Attached File |
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Posted: 8/4/2019 7:03:01 PM EST
[#48]
I get zero gas from my 10.3 URG-I. Right hand shooter.
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Posted: 8/4/2019 7:19:32 PM EST
[#49]
Quote HistoryOriginally Posted By Infidel4life11:
Let’s just say @5pt56 hook be up with the most awesome bday present ever in ODG. Ima drop it on you guys soon. It’ll be DMR style until I can scope the appropriate optic. Quote HistoryOriginally Posted By Infidel4life11:
Originally Posted By MILSPEC556:
Originally Posted By Infidel4life11:
Originally Posted By Combat_Diver:
Got to handle couple new URGI's at the range today. Didn't have my phone for pics. Barrel is a DD 14.5" Govt profile mid length gas. Gas block is NOT a Mk12 but what appears to be a Geissele gas block that is has a single pin to the barrel. CD
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Posted: 8/4/2019 7:47:00 PM EST
[#50]
Quote HistoryOriginally Posted By MILSPEC556:
@5pt56 better get me a sweet bday present too after this V.L. BS is over. (He will know what that means) 
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