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Posted: 3/13/2024 1:27:04 PM EDT
[Last Edit: Manticore_Arms]
Just got an original Steyr AUG 14" (13.8") barrel, it is brand new, only 90 rounds fired through it by the original owner, and then put away for 30+ years!
I wanted to compare it to the new 14.5" barrels, so here are two quick pictures- the difference is immediately evident and I will try to get more pics of the differences in the near future. Enjoy! Sven Manticore Arms  AUG 14.5" 20203 production barrel top (with A2 flash hider installed by me), 1990's AUG 13.8" barrel below. grips on both are fixed in place and will not fold.  AUG 14.5" barrel with A2 flash hider (left) is still a bit longer than AUG 13.8" with closed tulip device (right). The 13.8" barrel is chrome lined and also has different markings on it. The gas cylinder plug looks like bead blasted stainless with a more matte finish to it compared to the current silvery 14.5" plug. |
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USA
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Posted: 3/13/2024 2:23:42 PM EDT
[#1]
The 14.5" grip is probably a folding grip with something inside (like a bearing or piece of bolt) that prevents it from folding. I purchased a real non-folding grip for mine.
My 13.8" (now sold) also had a matte gas plug. |
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Posted: 3/13/2024 8:20:03 PM EDT
[#2]
 Aussie SASR signaler AUG....K2 2001 era |
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Posted: 3/13/2024 8:24:26 PM EDT
[#3]
Quote HistoryOriginally Posted By CJofFL: The 14.5" grip is probably a folding grip with something inside (like a bearing or piece of bolt) that prevents it from folding. I purchased a real non-folding grip for mine. My 13.8" (now sold) also had a matte gas plug. Correct, the 14.5" has a ball bearing in it to keep the grip from pulling down and folding. Mainly I was just REALLY happy to finally find a true early 90's 13.8" barrel, it was pretty much the last piece I needed to complete my collection, save for an ADI imported A2 receiver! (If anyone has a lead on one of those let me know! Sven Manticore Arms |
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Posted: 3/13/2024 8:25:16 PM EDT
[#4]
Quote HistoryOriginally Posted By 18B30: https://www.ar15.com/media/mediaFiles/2900/Dsc01017-3158299.jpg Aussie SASR signaler AUG....K2 2001 era Oh dang, with the super rare Aussie picatinny mount optic!!! Is that your picture? Is that your optic?!? Sven Manticore Arms |
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NC, USA
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Posted: 3/14/2024 7:36:25 AM EDT
[#5]
Why did Steyr make the change in length?
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Posted: 3/14/2024 10:14:10 AM EDT
[Last Edit: Manticore_Arms]
[#6]
Quote HistoryOriginally Posted By dmk0210: Why did Steyr make the change in length? The original 13.8" barrels required the gas port to be drilled at a 45 degree angle to give enough distance between the gas port and the open end of the muzzle to ensure enough dwell time for the gun to cycle at all. The 14.5" barrels they made in the last year does not require the port to be drilled at the awkward 45 degree angle, and also can easily be pinned to a non-NFA 16" with a standard AUG muzzle device. Sven Manticore Arms |
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NC, USA
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Posted: 3/14/2024 3:13:37 PM EDT
[#7]
Quote HistoryOriginally Posted By Manticore_Arms: The original 13.8" barrels required the gas port to be drilled at a 45 degree angle to give enough distance between the gas port and the open end of the muzzle to ensure enough dwell time for the gun to cycle at all. The 14.5" barrels they made in the last year does not require the port to be drilled at the awkward 45 degree angle, and also can easily be pinned to a non-NFA 16" with a standard AUG muzzle device. Sven Manticore Arms  |
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Posted: 3/15/2024 11:47:07 PM EDT
[Last Edit: 18B30]
[#8]
Quote HistoryOriginally Posted By Manticore_Arms: Oh dang, with the super rare Aussie picatinny mount optic!!! Is that your picture? Is that your optic?!? Sven Manticore Arms Quote HistoryOriginally Posted By Manticore_Arms: Originally Posted By 18B30: https://www.ar15.com/media/mediaFiles/2900/Dsc01017-3158299.jpg Aussie SASR signaler AUG....K2 2001 era Oh dang, with the super rare Aussie picatinny mount optic!!! Is that your picture? Is that your optic?!? Sven Manticore Arms The picture was taken in my Team's sleeping area in Sheriff 20 safehouse The gun is an Aussie SASR support cat (radioman's) issued gun. I was bored and borrowed it to play with. At the time, I knew very little about AUG's and had no idea this was a Aussie special forces issued only AUG variant. 18Z50 |
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AK, USA
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Posted: 3/19/2024 6:14:33 PM EDT
[#9]
Quote HistoryOriginally Posted By dmk0210: Why did Steyr make the change in length? The original Austrian 13.8 and 24 barrels are 13x1 LH threaded chrome lined hammer forged and also both have 1/7 twist but for very different reasons. The machine that made them broke. There is effectively no relationship between the original Austrian 13.8 barrels and the recent US made 14.5 barrels which are nitrided not chrome lined and 1/2x28 threaded and with a 1/9 twist. |
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Posted: 3/19/2024 6:50:55 PM EDT
[#10]
I sbred my ps90 and trying to track down a top rail to sbr my x95. After that I'll start an aug money pit
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Posted: 3/19/2024 10:18:42 PM EDT
[#11]
Quote HistoryOriginally Posted By TSH77769: The original Austrian 13.8 and 24 barrels are 13x1 LH threaded chrome lined hammer forged and also both have 1/7 twist but for very different reasons. The machine that made them broke. There is effectively no relationship between the original Austrian 13.8 barrels and the recent US made 14.5 barrels which are nitrided not chrome lined and 1/2x28 threaded and with a 1/9 twist. Quote HistoryOriginally Posted By TSH77769: Originally Posted By dmk0210: Why did Steyr make the change in length? The original Austrian 13.8 and 24 barrels are 13x1 LH threaded chrome lined hammer forged and also both have 1/7 twist but for very different reasons. The machine that made them broke. There is effectively no relationship between the original Austrian 13.8 barrels and the recent US made 14.5 barrels which are nitrided not chrome lined and 1/2x28 threaded and with a 1/9 twist. Excellent information! Sven Manticore Arms |
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AK, USA
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Posted: 3/22/2024 4:34:47 AM EDT
[#12]
The reason the 13.8 had a 1/7 twist was to be absolutely sure of stabilization despite the short barrel even at extreme altitude (Austrian Alps) and extreme cold.
the reason the 24 had a 1.7 twist is for tracers in the SAW or LMG role. |
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AK, USA
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Posted: 3/23/2024 2:47:43 AM EDT
[#13]
Quote HistoryOriginally Posted By Manticore_Arms: Correct, the 14.5" has a ball bearing in it to keep the grip from pulling down and folding. Mainly I was just REALLY happy to finally find a true early 90's 13.8" barrel, it was pretty much the last piece I needed to complete my collection, save for an ADI imported A2 receiver! (If anyone has a lead on one of those let me know! Sven Manticore Arms I used to have one but I sold it sometime ago sorry about that. It was perfect too absolutely perfect and it went for way below market value I was really bummed about that. |
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