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Posted: 11/26/2015 10:51:26 AM EDT
[#1]
check out hardened arms
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Posted: 11/26/2015 10:53:02 AM EDT
[#2]
This would be my pick. It is 8.5" which is more reliable.
http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html |
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Posted: 11/26/2015 11:10:20 AM EDT
[#3]
Quote HistoryQuoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? |
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Posted: 11/26/2015 11:24:13 AM EDT
[#4]
Quote HistoryQuoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html I have that upper, it's nice. I added an h2 buffer and chrome silicon recoil spring to smooth the recoil a little. Very fun pistol! Wear gloves - that kmr gets hot |
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Posted: 11/26/2015 11:25:50 AM EDT
[#5]
http://www.karrisguns.com/
I own one and it works well. got the melonite upgrade on the bolt. http://www.jsesurplus.com/7-11pistoluppers.aspx little more but they too have instock. |
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Posted: 11/26/2015 11:26:51 AM EDT
[#6]
My 7.5 is very reliable. I didn't buy a whole upper though. Got the barrel from gun broker and the rest of it from various venders.
My post rattle can paint job. 
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Posted: 11/26/2015 11:31:30 AM EDT
[#7]
Quote HistoryQuoted:
How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? Quote HistoryQuoted:
Quoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? The 8.5 would have slightly more dwell time, which is never a bad thing when you are talking about very short barreled Ar-15s. Pistol length gas system uppers get dirty quicker, and carbon fouling builds up much faster. Alot of people will add a expansion chamber brake to short barrels to create back pressure to aid reliability in 7.5 to 10.5 inch guns. What has made 7.5-10.5" uppers notoriously unreliable in the past is a wide variation in gas port sizes and the general fact that quality is was shitty. |
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Posted: 11/26/2015 11:37:09 AM EDT
[#8]
Complete in the EE for $300
http://www.ar15.com/forums/t_7_159/1348562_7_5_Upper_COMPLETE_w_BCG_and_FF_7_Rail___400_SALE__350_NOW__300_shipped___.html |
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Posted: 11/26/2015 11:39:21 AM EDT
[#9]
Quote HistoryQuoted:
The 8.5 would have slightly more dwell time, which is never a bad thing when you are talking about very short barreled Ar-15s. Pistol length gas system uppers get dirty quicker, and carbon fouling builds up much faster. Alot of people will add a expansion chamber brake to short barrels to create back pressure to aid reliability in 7.5 to 10.5 inch guns. What has made 7.5-10.5" uppers notoriously unreliable in the past is a wide variation in gas port sizes and the general fact that quality is was shitty. Quote HistoryQuoted:
Quoted:
Quoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? The 8.5 would have slightly more dwell time, which is never a bad thing when you are talking about very short barreled Ar-15s. Pistol length gas system uppers get dirty quicker, and carbon fouling builds up much faster. Alot of people will add a expansion chamber brake to short barrels to create back pressure to aid reliability in 7.5 to 10.5 inch guns. What has made 7.5-10.5" uppers notoriously unreliable in the past is a wide variation in gas port sizes and the general fact that quality is was shitty. So what port size am I looking for? Bigger the better or a distinct size. Most don't even list the port size but the PSA one above shows a .750 gas block. Im checking out these two based solely on recommendations from above and the look, but they do offer one with a Krink brake which I would think would add more back pressure. http://www.karrisguns.com/catalog/product/3ca03f7c247c4c138b66d829623d5b8f https://www.hardenedarms.com/ecProduct_211_27 |
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Posted: 11/26/2015 11:41:43 AM EDT
[#10]
10.5 is a lot better, both in function and ballistics.
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Posted: 11/26/2015 11:41:48 AM EDT
[#11]
Quote HistoryQuoted:
Complete in the EE for $300 http://www.ar15.com/forums/t_7_159/1348562_7_5_Upper_COMPLETE_w_BCG_and_FF_7_Rail___400_SALE__350_NOW__300_shipped___.html Does this seem like a good deal for pretty reasonable quality, would love to support a site sponsor. |
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Posted: 11/26/2015 11:48:30 AM EDT
[#12]
Quote HistoryQuoted:
10.5 is a lot better, both in function and ballistics. Yeah, but imagine a FA Beta mag dump from a 7.5 inch barreled SBR at night! 
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Posted: 11/26/2015 11:48:53 AM EDT
[#13]
Quote HistoryQuoted:
Does this seem like a good deal for pretty reasonable quality, would love to support a site sponsor. Quote HistoryQuoted:
Quoted:
Complete in the EE for $300 http://www.ar15.com/forums/t_7_159/1348562_7_5_Upper_COMPLETE_w_BCG_and_FF_7_Rail___400_SALE__350_NOW__300_shipped___.html Does this seem like a good deal for pretty reasonable quality, would love to support a site sponsor. I'd say for $300 shipped it's a pretty good deal. Do it. |
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Posted: 11/26/2015 11:49:52 AM EDT
[#14]
Quote HistoryQuoted:
So what port size am I looking for? Bigger the better or a distinct size. Most don't even list the port size but the PSA one above shows a .750 gas block. Im checking out these two based solely on recommendations from above and the look, but they do offer one with a Krink brake which I would think would add more back pressure. http://www.karrisguns.com/catalog/product/3ca03f7c247c4c138b66d829623d5b8f https://www.hardenedarms.com/ecProduct_211_27 Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? The 8.5 would have slightly more dwell time, which is never a bad thing when you are talking about very short barreled Ar-15s. Pistol length gas system uppers get dirty quicker, and carbon fouling builds up much faster. Alot of people will add a expansion chamber brake to short barrels to create back pressure to aid reliability in 7.5 to 10.5 inch guns. What has made 7.5-10.5" uppers notoriously unreliable in the past is a wide variation in gas port sizes and the general fact that quality is was shitty. So what port size am I looking for? Bigger the better or a distinct size. Most don't even list the port size but the PSA one above shows a .750 gas block. Im checking out these two based solely on recommendations from above and the look, but they do offer one with a Krink brake which I would think would add more back pressure. http://www.karrisguns.com/catalog/product/3ca03f7c247c4c138b66d829623d5b8f https://www.hardenedarms.com/ecProduct_211_27 From everything I have been told .055" to .060" is ideal for 7.5" using 885 or 193 spec loads. |
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Posted: 11/26/2015 11:51:37 AM EDT
[#15]
I looked at the site sponsor one too, but felt that for the extra 100 bucks getting the melonite barrel and bcg was a better deal.
I did get the one with the krink break on it as well just due to looks and hoping the "blast" was going to be less coming from it. don't have anything to compare to, so can't say for sure, but it didn't seem much worse than my 16 inch coming out, except the exceptional flash. lol. |
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Posted: 11/26/2015 11:52:09 AM EDT
[#16]
I have one of these mounted on my SBR and it has been flawless for about 500 rds.
It was offered in the EE for about 300 bucks when I bought it. Fast shipping, buy with confidence 7.5 upper |
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Posted: 11/26/2015 11:56:54 AM EDT
[#17]
Quote HistoryQuoted:
10.5 is a lot better, both in function and ballistics. While true, the compactness of a 7.5" is the best feature, IMHO. Separate the lower from the upper and it fits into a normal sized backpack. |
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Posted: 11/26/2015 12:06:48 PM EDT
[#18]
Quote HistoryQuoted:
Does this seem like a good deal for pretty reasonable quality, would love to support a site sponsor. Quote HistoryQuoted:
Quoted:
Complete in the EE for $300 http://www.ar15.com/forums/t_7_159/1348562_7_5_Upper_COMPLETE_w_BCG_and_FF_7_Rail___400_SALE__350_NOW__300_shipped___.html Does this seem like a good deal for pretty reasonable quality, would love to support a site sponsor. I just ordered 2 uppers from him. Great customer service so far. Hard to beat those prices for an upper WITH BCG. He also has .300BLK uppers for not much more. |
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Posted: 11/26/2015 12:09:06 PM EDT
[#19]
the Anderson 7.5" upper look just like American Tactical Imports upper..
Are they made by the same people? |
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Posted: 11/26/2015 12:09:09 PM EDT
[#20]
my frankenbuilt 7.5 is dead nuts reliable.
no real perceptible difference from my PSA 10.5 since both are for close up shooting. Not sure why but neither of mane throw a fireball and with the KAK flashcan all noise is sent downrange I have a CMMG 22lr conversion kit which makes it 2x as fun. |
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Posted: 11/26/2015 12:36:39 PM EDT
[#21]
I have a radical firearms 8.5 inch 300 blackout upper. I have been very happy with it. They seem to have some in stock and on sale.
http://www.radicalfirearms.com/category-s/1853.htm?searching=Y&sort=11&cat=1853&show=30&page=1 |
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Posted: 11/26/2015 12:40:49 PM EDT
[#22]
Quote HistoryQuoted:
my frankenbuilt 7.5 is dead nuts reliable. no real perceptible difference from my PSA 10.5 since both are for close up shooting. Not sure why but neither of mane throw a fireball and with the KAK flashcan all noise is sent downrange I have a CMMG 22lr conversion kit which makes it 2x as fun. I have a 22 Conversion bolt etc already... Do I want a 1/7 or 1/9 barrel for .22 caliber? |
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Posted: 11/26/2015 12:40:57 PM EDT
[#23]
Check Andro Corp
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Posted: 11/26/2015 12:42:39 PM EDT
[#24]
Quote HistoryQuoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html I just ordered mine.First pistol build, so excited.Thank you. |
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Posted: 11/26/2015 12:48:57 PM EDT
[#25]
I built it by my own damn-self.
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Posted: 11/26/2015 12:56:55 PM EDT
[#26]
Quote HistoryQuoted:
I just ordered mine.First pistol build, so excited.Thank you. Quote HistoryQuoted:
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This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html I just ordered mine.First pistol build, so excited.Thank you. Your welcome. PSA usually has the plated BCG/CH package with an extended latch on the charging handle but it is currently out of stock. An extended latch is a very handy thing to have. You can get an extended latch to upgrade a regular charging handle for 5 or 6 dollars. IMO it is worth the few extra dollars. I really like the falcon industries standard ergo grip. It is much better then an A2. |
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Posted: 11/26/2015 1:08:11 PM EDT
[#27]
Quote HistoryQuoted: I have a 22 Conversion bolt etc already... Do I want a 1/7 or 1/9 barrel for .22 caliber? Quote HistoryQuoted: Quoted: my frankenbuilt 7.5 is dead nuts reliable. no real perceptible difference from my PSA 10.5 since both are for close up shooting. Not sure why but neither of mane throw a fireball and with the KAK flashcan all noise is sent downrange I have a CMMG 22lr conversion kit which makes it 2x as fun. I have a 22 Conversion bolt etc already... Do I want a 1/7 or 1/9 barrel for .22 caliber? Get whatever twist you like for the 5.56 ammo you like, there will not be an appreciable difference with the 22, as the twist is too fast for 22LR, no matter which one you use. My CMMG kit is accurate out to about 50 feet, but anymore than that, and you probably want to be looking at one of CMMGs dedicated uppers with the 1in12 barrel. |
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Posted: 11/26/2015 2:16:33 PM EDT
[#28]
And the sig braces are still GTG right, because I have one sitting on my living room table right now.
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Posted: 11/26/2015 2:22:55 PM EDT
[#29]
Quote HistoryQuoted:
How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? Quote HistoryQuoted:
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This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? My 7.5 runs great with a h2 buffer.With a h1 buffer it would lock back on the last round. They can be a little picky. I cant imagine a 8.5 making much of a difference. |
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Posted: 11/26/2015 2:31:27 PM EDT
[#30]
Quote HistoryQuoted:
And the sig braces are still GTG right, because I have one sitting on my living room table right now. Write a letter to the ATF. They're fine, just make sure you use them as designed. |
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Posted: 11/26/2015 2:40:51 PM EDT
[#31]
Quote HistoryQuoted:
Write a letter to the ATF. They're fine, just make sure you use them as designed. Quote HistoryQuoted:
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And the sig braces are still GTG right, because I have one sitting on my living room table right now. Write a letter to the ATF. They're fine, just make sure you use them as designed. Nope, I will not have the man in my life shooting my dog. 
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Posted: 11/26/2015 2:50:11 PM EDT
[#32]
$449
http://fatboytactical.net/index.php?main_page=product_info&cPath=2&products_id=28693 And another http://fatboytactical.net/index.php?main_page=product_info&cPath=2&products_id=28692 If it wasn't the holidays, you would probably have it at your door in about two days. Good folks to buy from and very fast shipping. |
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Posted: 11/26/2015 2:52:58 PM EDT
[#33]
Bought a Radical firearms 7.5" upper from Primary Arms last year, 1000+ rounds through it so far and no problems.
$279 and in stock. http://www.primaryarms.com/radical-firearms-75-quad-rail-m4-upper-receiver-without-bcg-or-charging-handle/p/kt-rfupperv1.0.75/ |
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Posted: 11/26/2015 2:54:27 PM EDT
[#34]
Quote HistoryQuoted:
the Anderson 7.5" upper look just like American Tactical Imports upper.. Are they made by the same people? I sent mine back twice, they couldn't seem to fix it even after making me pay for a barrel, it still failed. The third time I never tested it, I just sold it. |
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Posted: 11/26/2015 3:10:23 PM EDT
[#35]
I own one (7.5) and I wish i didn't, it is just a toy that never leaves the safe.
I am not a 300BO fan boy but I am going to order up a 8.5 inch barrel and swap it out so at least it has some use YMMV ETA pitchure 
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Posted: 11/26/2015 3:11:36 PM EDT
[#36]
Quote HistoryQuoted:
I have that upper, it's nice. I added an h2 buffer and chrome silicon recoil spring to smooth the recoil a little. Very fun pistol! Wear gloves - that kmr gets hot Quote HistoryQuoted:
Quoted:
This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html I have that upper, it's nice. I added an h2 buffer and chrome silicon recoil spring to smooth the recoil a little. Very fun pistol! Wear gloves - that kmr gets hot I just ordered one for my first pistol build. It seems like a helluva deal for the price. |
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Posted: 11/26/2015 3:12:13 PM EDT
[#37]
Quote HistoryQuoted:
I sent mine back twice, they couldn't seem to fix it even after making me pay for a barrel, it still failed. The third time I never tested it, I just sold it. Quote HistoryQuoted:
Quoted:
the Anderson 7.5" upper look just like American Tactical Imports upper.. Are they made by the same people? I sent mine back twice, they couldn't seem to fix it even after making me pay for a barrel, it still failed. The third time I never tested it, I just sold it. what was it doing? short stroking? |
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Posted: 11/26/2015 3:14:45 PM EDT
[#38]
Aero Precision has them in stock.
http://www.aeroprecisionusa.com/m4e1-556-75-pistol-complete-upper.html ETA: Sorry, that doesn't include the BCG or Charging Handle. |
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Posted: 11/26/2015 3:16:38 PM EDT
[#39]
The one on EE for $300 is the one I got. Runs excellent. And a blast to shoot.
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Posted: 11/26/2015 3:21:31 PM EDT
[#40]
Quote HistoryQuoted:
I own one (7.5) and I wish i didn't, it is just a toy that never leaves the safe. I am not a 300BO fan boy but I am going to order up a 8.5 inch barrel and swap it out so at least it has some use YMMV ETA pitchure http://i1350.photobucket.com/albums/p780/Devin_McBride/6889427b05a16e12e3f1ac45060a5f8d_zpslm6uxou4.jpg Nice. I am a fan of the Stark AFG too. |
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Posted: 11/26/2015 3:29:46 PM EDT
[#41]
Quote HistoryQuoted:
Nice. I am a fan of the Stark AFG too. Quote HistoryQuoted:
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I own one (7.5) and I wish i didn't, it is just a toy that never leaves the safe. I am not a 300BO fan boy but I am going to order up a 8.5 inch barrel and swap it out so at least it has some use YMMV ETA pitchure http://i1350.photobucket.com/albums/p780/Devin_McBride/6889427b05a16e12e3f1ac45060a5f8d_zpslm6uxou4.jpg Nice. I am a fan of the Stark AFG too. Yeah Stark is not just for the "grip of shame" 
That was actually an older picture, becuase I dont shoot it much I stripped it of most of the goodies like the stark, aimpoint, and thordson cheek rest which most now live on my P556. Sadly the 7.5 just has all the old shit I had in a drawer Magpul AFG, Sig micro red dot, a TRL-1, and the buffer tube is wrapped in para cord. I will fix it back up when I change out the barrel |
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Posted: 11/26/2015 3:32:35 PM EDT
[#42]
Quote HistoryQuoted:
Yeah Stark is not just for the "grip of shame"
That was actually an older picture, becuase I dont shoot it much I stripped it of most of the goodies like the stark, aimpoint, and thordson cheek rest which most now live on my P556. Sadly the 7.5 just has all the old shit I had in a drawer Magpul AFG, Sig micro red dot, a TRL-1, and the buffer tube is wrapped in para cord. I will fix it back up when I change out the barrel Quote HistoryQuoted:
Quoted:
Quoted:
I own one (7.5) and I wish i didn't, it is just a toy that never leaves the safe. I am not a 300BO fan boy but I am going to order up a 8.5 inch barrel and swap it out so at least it has some use YMMV ETA pitchure http://i1350.photobucket.com/albums/p780/Devin_McBride/6889427b05a16e12e3f1ac45060a5f8d_zpslm6uxou4.jpg Nice. I am a fan of the Stark AFG too. Yeah Stark is not just for the "grip of shame"
That was actually an older picture, becuase I dont shoot it much I stripped it of most of the goodies like the stark, aimpoint, and thordson cheek rest which most now live on my P556. Sadly the 7.5 just has all the old shit I had in a drawer Magpul AFG, Sig micro red dot, a TRL-1, and the buffer tube is wrapped in para cord. I will fix it back up when I change out the barrel Why do you hate it? |
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Posted: 11/26/2015 3:32:55 PM EDT
[#43]
Diamondback, got one and its great!
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Posted: 11/26/2015 4:58:43 PM EDT
[#44]
Typical ARFCOM Response "Get Both"
I have both barrel lengths on a pair of Tennessee Arms clear plastic lowers that I am running durability tests on. (so far no issues) 
I prefer the compactness of the 7.5, but the noise level of the 7.5" is much more than the 10.5". The 7.5" was built on a Anderson upper from Fat boy tactical, with a stainless barrel from JSE surplus, and a BCG from Fat Boy. Handguard is Free float from JSE also. The 10.5" was built on a Anderson upper with a 1x6" Green Mountain experimental barrel. BCG from Fat Boy. Standard Carbine handguard |
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Posted: 11/26/2015 5:09:12 PM EDT
[#45]
Quote HistoryQuoted:
Bought a Radical firearms 7.5" upper from Primary Arms last year, 1000+ rounds through it so far and no problems.
$279 and in stock. http://www.primaryarms.com/radical-firearms-75-quad-rail-m4-upper-receiver-without-bcg-or-charging-handle/p/kt-rfupperv1.0.75/ That's the exact upper I used on this build; it's on an ArmaLite lower, used a Spikes LPK and a Colt BCG. I've only got 300 rounds through it but it's a hoot to shoot
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Posted: 11/26/2015 5:23:19 PM EDT
[#46]
Quote HistoryQuoted:
Why do you hate it? Quote HistoryQuoted:
Quoted:
Quoted:
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I own one (7.5) and I wish i didn't, it is just a toy that never leaves the safe. I am not a 300BO fan boy but I am going to order up a 8.5 inch barrel and swap it out so at least it has some use YMMV ETA pitchure http://i1350.photobucket.com/albums/p780/Devin_McBride/6889427b05a16e12e3f1ac45060a5f8d_zpslm6uxou4.jpg Nice. I am a fan of the Stark AFG too. Yeah Stark is not just for the "grip of shame"
That was actually an older picture, becuase I dont shoot it much I stripped it of most of the goodies like the stark, aimpoint, and thordson cheek rest which most now live on my P556. Sadly the 7.5 just has all the old shit I had in a drawer Magpul AFG, Sig micro red dot, a TRL-1, and the buffer tube is wrapped in para cord. I will fix it back up when I change out the barrel Why do you hate it? It isnt useful for defense or hunting ETA with a 7.5 inch barrel you are at 7.62x39 velocity at less than half the grain wheight 
The maximum velocity for the M855 projectile occurred in a 20-inch barrel. This is anticipated since the cartridge was designed specifically for this barrel length. Velocity drops rapidly as the barrel length decreases, especially below 10 inches where the velocity drops below 2,500 fps. M855 bullets traveling below 2,500 fps when impacting a target will not produce a lethal wound channel. |
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Posted: 11/26/2015 5:31:10 PM EDT
[#47]
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I have that upper, it's nice. I added an h2 buffer and chrome silicon recoil spring to smooth the recoil a little. Very fun pistol! Wear gloves - that kmr gets hot Quote HistoryQuoted:
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This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html I have that upper, it's nice. I added an h2 buffer and chrome silicon recoil spring to smooth the recoil a little. Very fun pistol! Wear gloves - that kmr gets hot I will have to try that. My 8.5 inch is snotty. |
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Posted: 11/26/2015 5:31:49 PM EDT
[#48]
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Posted: 11/27/2015 7:46:51 PM EDT
[#49]
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So what port size am I looking for? Bigger the better or a distinct size. Most don't even list the port size but the PSA one above shows a .750 gas block. Im checking out these two based solely on recommendations from above and the look, but they do offer one with a Krink brake which I would think would add more back pressure. http://www.karrisguns.com/catalog/product/3ca03f7c247c4c138b66d829623d5b8f https://www.hardenedarms.com/ecProduct_211_27 Quote HistoryQuoted:
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This would be my pick. It is 8.5" which is more reliable. http://palmettostatearmory.com/psa-8-5-pistol-length-5-56-nato-1-7-7-2a-melonite-upper-no-bcg-or-charging-handle.html I'd get this bolt and chargin handle http://palmettostatearmory.com/5-56-full-auto-nickel-boron-bcg-with-charging-handle.html How much more reliable is 8.5 vs 7.5? Is it a night and day difference or just marginally? Are the 7.5 uppers notoriously awful or something? The 8.5 would have slightly more dwell time, which is never a bad thing when you are talking about very short barreled Ar-15s. Pistol length gas system uppers get dirty quicker, and carbon fouling builds up much faster. Alot of people will add a expansion chamber brake to short barrels to create back pressure to aid reliability in 7.5 to 10.5 inch guns. What has made 7.5-10.5" uppers notoriously unreliable in the past is a wide variation in gas port sizes and the general fact that quality is was shitty. So what port size am I looking for? Bigger the better or a distinct size. Most don't even list the port size but the PSA one above shows a .750 gas block. Im checking out these two based solely on recommendations from above and the look, but they do offer one with a Krink brake which I would think would add more back pressure. http://www.karrisguns.com/catalog/product/3ca03f7c247c4c138b66d829623d5b8f https://www.hardenedarms.com/ecProduct_211_27 I'd go with Karris, for no other reason then it would be a one stop shop. I'd get the plated BCG and Charging handle with extended latch. |
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