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Posted: 6/20/2018 11:40:54 AM EDT
[#1]
Assume you researched it before buying. What specifically do you want to know? Buy extra mags. Stock up on ammo. SBR and suppress it if you want. What else?
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Posted: 6/20/2018 12:15:27 PM EDT
[#2]
In no particular order....
1) Buy magazines, don't pay extra for 50-rounders when 30's can be so easily converted. 2) Get magazine carriers 3) Keep your eye open for replacement aluminum hammers that mimic the Gen1 contours (and no, I cannot tell you why). 4) Don't buy the FN overpriced cleaning kit that fits in the buttstock. Use a generic one. 5) SBR |
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Posted: 6/20/2018 12:56:44 PM EDT
[#3]
SBR and suppress it!
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Posted: 6/20/2018 1:14:59 PM EDT
[#4]
Put in for your stamp now. Strike industries sells the old OEM optics. Combine the two and you have one of the coolest guns around.
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Posted: 6/20/2018 1:22:26 PM EDT
[#5]
This was info I wish I had when I first got mine.
 Failed To Load Title The guys saying to put in for your stamp now are absolutely correct, I think the CMMG parts (barrel/FH/adapter) are top notch. I still need to add a flashlight to mine but it's so fun to shoot. Also I heard that some new 5.7 guns are hitting the market soon which might spur more ammo, although SGAmmo has American Eagle for like 32-24 cents a round. |
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Posted: 6/22/2018 11:03:14 AM EDT
[#6]
All you need to know is to go Form 1 it right now. You'll thank us later.
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Posted: 6/22/2018 11:40:54 AM EDT
[#7]
Quote HistoryQuoted:
All you need to know is to go Form 1 it right now. You'll thank us later. A long-barreled PS90 might as well be substituted with an AR firing 5.56 as there's just no point. |
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Posted: 6/23/2018 11:46:18 AM EDT
[#8]
Quote HistoryQuoted:
In no particular order.... 3) Keep your eye open for replacement aluminum hammers that mimic the Gen1 contours (and no, I cannot tell you why). Unless you want to maybe one day have to explain to someone why you swapped hammers, it’s not really worth it IMHO. |
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Posted: 6/23/2018 1:01:24 PM EDT
[#9]
The aluminum Man Kave Gen I hammers are installed primarily for a lighter and shorter trigger pull.
And yes, if you were inclined to do something incredibly stupid (and illegal) you would need a Gen I hammer, or if you know what your doing you can install a Steyr AUG hammer or even modify the stock Gen III hammer to Gen I. |
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Posted: 6/23/2018 1:25:49 PM EDT
[#10]
Quoted:
Current production PS90. What do I need to know? |
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Posted: 6/23/2018 2:26:32 PM EDT
[#11]
Quote HistoryQuoted:
Unless you want to maybe one day have to explain to someone why you swapped hammers, it's not really worth it IMHO. Remember you have the right to remain silent. I don't recommend doing anything to draw unwanted attention in the first place. |
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Posted: 6/23/2018 3:03:21 PM EDT
[#12]
Quote HistoryQuoted:
The aluminum Man Kave Gen I hammers are installed primarily for a lighter and shorter trigger pull. And yes, if you were inclined to do something incredibly stupid (and illegal) you would need a Gen I hammer, or if you know what your doing you can install a Steyr AUG hammer or even modify the stock Gen III hammer to Gen I. |
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Posted: 6/23/2018 3:25:07 PM EDT
[#13]
Quote HistoryQuoted: I’m curious why you would need the sear notch in the Gen 1 location to give you a lighter and shorter trigger pull, and in fact that notch is completely useless in Gen 4 packs since the other sear is missing. |
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Posted: 6/24/2018 3:34:25 PM EDT
[#14]
When ammo is cheap stack it deep...
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Posted: 6/24/2018 5:24:48 PM EDT
[#15]
Quote HistoryQuoted: One quirk that 5.7x28 Weapons have is you MUST clean the chamber with Carburetor Cleaner. It removes the lacquer build up from the casings. |
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Posted: 6/24/2018 7:56:01 PM EDT
[#16]
Quote HistoryQuoted: Is all 5.7 lacquered? How iften do you have to clean it like that? I’m pretty anal about cleaning my weapons. I clean it every time it’s fired. That being said, you will find that the 5.7x28 is the cleanest burning round you will ever encounter. |
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Posted: 6/24/2018 11:38:02 PM EDT
[#17]
Quote HistoryQuoted: Yep! Depending on who listen to, the lacquer is on the case to lube it or it’s there to provide resistance so that the case “sticks” in the chamber providing some lockup. I believe it’s the latter, why? Because I don’t see how the lacquer coated brass can be as slick as polished brass. Regardless, why ever it’s coated it works! I’m pretty anal about cleaning my weapons. I clean it every time it’s fired. That being said, you will find that the 5.7x28 is the cleanest burning round you will ever encounter. How do you clean that lacquer off? What parts have to be cleaned? |
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Posted: 6/25/2018 9:58:34 AM EDT
[#18]
Quote HistoryQuoted:
How do you clean that lacquer off? What parts have to be cleaned? MAKE SURE YOU DON’T GET CARBURETOR CLEANER ON PLASTIC!!!!!!! |
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Posted: 6/25/2018 2:35:43 PM EDT
[#19]
Quote HistoryQuoted: thanks for the info. How do you clean that lacquer off? What parts have to be cleaned? |
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Posted: 6/25/2018 3:55:36 PM EDT
[#20]
Quote HistoryQuoted:
4) Don't buy the FN overpriced cleaning kit that fits in the buttstock. Use a generic one. 
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Posted: 6/25/2018 4:29:31 PM EDT
[#21]
I had a friend of mine use a high resolution copy machine to reduce his to the size of a credit card and laminated it.
We used to get harassed pretty badly by a Missouri Department of Conservation Officer at one of their ranges, when he walked up one day and said “I need to see your paperwork” He was handed the credit card sized form. He said “How am I supposed to read this?” Not our problem! |
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Posted: 6/25/2018 4:31:36 PM EDT
[#22]
Quote HistoryQuoted:
I had a friend of mine use a high resolution copy machine to reduce his to the size of a credit card and laminated it. We used to get harassed pretty badly by a Missouri Department of Conservation Officer at one of their ranges, when he walked up one day and said “ I need 
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Posted: 6/25/2018 7:40:07 PM EDT
[#23]
Quote HistoryQuoted:
I normally print them half size so they're still legible and fold/roll them up in a tiny tool tube and stick it in the grip/stock of the gun it goes with. https://captainscharts.com/files/subscribers/761c873c-3670-4fae-9753-7424f44a1be7/sites/a044a6b7-9c11-4673-a1b8-913caec56b35/products/Product_b9b70b97-490a-433f-839e-9fd712c33233_xlarge.png?stamp=635471811680000000 Quote HistoryQuoted:
Quoted:
I had a friend of mine use a high resolution copy machine to reduce his to the size of a credit card and laminated it. We used to get harassed pretty badly by a Missouri Department of Conservation Officer at one of their ranges, when he walked up one day and said “ I need https://captainscharts.com/files/subscribers/761c873c-3670-4fae-9753-7424f44a1be7/sites/a044a6b7-9c11-4673-a1b8-913caec56b35/products/Product_b9b70b97-490a-433f-839e-9fd712c33233_xlarge.png?stamp=635471811680000000 |
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Posted: 6/25/2018 9:29:43 PM EDT
[#24]
Quote HistoryQuoted:
I had a friend of mine use a high resolution copy machine to reduce his to the size of a credit card and laminated it. We used to get harassed pretty badly by a Missouri Department of Conservation Officer at one of their ranges, when he walked up one day and said “I need to see your paperwork” He was handed the credit card sized form. He said “How am I supposed to read this?” Not our problem! |
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Posted: 6/25/2018 11:29:12 PM EDT
[#25]
My plan as well, buy one. Get short barrel. Many mags. Have fun.
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Posted: 6/25/2018 11:31:14 PM EDT
[#26]
I only scrub the chambers on my guns when they give me fits, which is few far and inbetween. Hell the sBR is filthy from suppressor use, and it keeps on running :D
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Posted: 6/26/2018 2:59:54 PM EDT
[#27]
When PSA has it in stock, the ammo is the cheapest I can find. I work for an FFL and their cost (normally $17.99 for FN Brand Blue Tips) is a good chunk less than normal dealer cost.
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Posted: 6/30/2018 7:05:32 PM EDT
[#28]
Somewhat on topic.... Between the AE open tip ammo and the FN Blue Tip ammo; which is a better pinker and which to keep on hand for a defensive situation? I am tracking there are a few small manufacturers out there doing great stuff with the 5.7mm but that ammo is quite pricey.
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Posted: 6/30/2018 7:28:59 PM EDT
[#29]
Urban Sentry Sling is the best in my experience.
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Posted: 6/30/2018 7:42:10 PM EDT
[#30]
Congratulations, you are now qualified for stargate operations.
Also be sure to SBR and suppress. |
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Posted: 6/30/2018 10:01:25 PM EDT
[#31]
Quote HistoryQuoted:
I only scrub the chambers on my guns when they give me fits, which is few far and inbetween. |
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Posted: 7/1/2018 3:35:54 PM EDT
[#32]
Quote HistoryQuoted:
Somewhat on topic.... Between the AE open tip ammo and the FN Blue Tip ammo; which is a better pinker and which to keep on hand for a defensive situation? I am tracking there are a few small manufacturers out there doing great stuff with the 5.7mm but that ammo is quite pricey. |
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Posted: 7/1/2018 4:37:22 PM EDT
[#33]
Quote HistoryQuoted:
AE only sells a TMJ round. Both it, and the SS197SR are good for plinking. The SS198LF red box from FN would be a preferred Defensive ammo. However given we have a full 16" barrel length, SS197SR will fragment as intended. The AE TMJ will just penetrate like a FMJ, and because it's short, if it tumbles, it won't be making huge cavities of any kind. The aftermarket guys shine on bringing up the velocity of the round to offer better performance. In the PS90/SBR if you want supersonic stay at 40gr and under. The 50+gr is for subsonic. The TSX rounds at the velocities the 5.7 can do, do NOT peform. Quote HistoryQuoted:
Quoted:
Somewhat on topic.... Between the AE open tip ammo and the FN Blue Tip ammo; which is a better pinker and which to keep on hand for a defensive situation? I am tracking there are a few small manufacturers out there doing great stuff with the 5.7mm but that ammo is quite pricey. |
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Posted: 7/1/2018 4:43:25 PM EDT
[#34]
You need $400 for tax stamps.
I'm thinking about buying a Mini4 for mine. |
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Posted: 7/1/2018 9:34:02 PM EDT
[#35]
Quote HistoryQuoted:
You need $400 for tax stamps. I'm thinking about buying a Mini4 for mine. |
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Posted: 7/1/2018 9:46:08 PM EDT
[#36]
Quote HistoryQuoted: What's. A mini 4? I've also heard the Sandman-K and Omega 9k are decent options. |
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Posted: 7/1/2018 9:56:50 PM EDT
[#37]
I’m sure it would be hard for a bullpup gun. This gun needs a binary trigger
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Posted: 7/1/2018 10:48:21 PM EDT
[#38]
Quote HistoryQuoted:
Short 5.56 suppressor from AAC. I've heard they're excellent on 5.7 as they have more volume than .22 cans and don't need as much volume as 5.56. I've also heard the Sandman-K and Omega 9k are decent options. |
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Posted: 7/2/2018 12:44:44 AM EDT
[#39]
True. a .22 can that will work with 5.7 will take subs on the SBR down to about 122db. a 5.56 can will take those same subs down to 112db :D I have YHM Turbo video where I had the sound meter.
Here's the GP5 being used:  5.7x28mm, 55gr FMJ Subsonic, Detroit Ammo Co / Triple R Munitions |
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Posted: 7/2/2018 6:26:04 PM EDT
[#40]
Is ss197 really as bad as people make it out to be? I have some of it as that is whats only available locally.
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Posted: 7/2/2018 10:16:47 PM EDT
[#41]
Quote HistoryQuoted:
Is ss197 really as bad as people make it out to be? I have some of it as that is whats only available locally. Both SS197 and “Federal American Eagle” are manufactured by Fiocchi in Ozark, MO. I’ve personally experienced issues with SS197, I was firing a magazine though my PS90, I had four rounds that were noticeably quieter than normal and failed to eject. They were so light I checked the bore each time to make sure I didn’t have a projectile stuck in the bore. Jay (Elite Ammunition) has a video of him breaking down SS197, out of 50 rounds he found a 10% variation in powder charges. On a round that operates at that high of pressure and with a case that small, that’s INSANE! Here is a photo that was posted at fnforums.net of several rounds of SS197 out of one box of 50.... 
Is is good cheap practice ammo, but I run EVERY ROUND through a cartridge gauge to make sure it meets SAAMI dimensions. Under no circumstance would I trust it for a defensive round. Run either Elite Ammunition or SS198LF which is manufactured by FN in Belgium. |
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Posted: 7/3/2018 4:55:12 AM EDT
[#42]
Quote HistoryQuoted:
Is ss197 really as bad as people make it out to be? I have some of it as that is whats only available locally. |
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Posted: 7/3/2018 10:48:51 AM EDT
[#43]
Quote HistoryQuoted: I've shot thousands of unmodified SS197 and American Eagle through my PS90. Not one single problem with either. I do crimp at least half of my ammo (both 197 & AE) since people say they've had problems with bullet separation, but I havn't seen it yet. Honestly, if neither one of those brands worked I wouldn't own a PS90. |
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Posted: 7/3/2018 11:46:31 AM EDT
[#44]
Quote HistoryQuoted:
Thats the thing. If I can’t get ammo for it locally, I don’t want it and I would hate to get rid of my ps90. |
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Posted: 7/3/2018 3:00:52 PM EDT
[#45]
Quote HistoryQuoted: I've shot thousands of unmodified SS197 and American Eagle through my PS90. Not one single problem with either. I do crimp at least half of my ammo (both 197 & AE) since people say they've had problems with bullet separation, but I havn't seen it yet. Honestly, if neither one of those brands worked I wouldn't own a PS90. 
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Posted: 7/3/2018 5:36:11 PM EDT
[#46]
Quote HistoryQuoted: This round of Federal American Eagle (Fiocchi) was deformed and jammed up our P90. It occurred at full auto, 900 rpm but that shouldn’t make a difference. https://i.imgur.com/4MawJUt.jpg |
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Posted: 7/17/2018 3:18:33 PM EDT
[#47]
Quote HistoryQuoted: It CAN be! Both SS197 and “Federal American Eagle” are manufactured by Fiocchi in Ozark, MO. I’ve personally experienced issues with SS197, I was firing a magazine though my PS90, I had four rounds that were noticeably quieter than normal and failed to eject. They were so light I checked the bore each time to make sure I didn’t have a projectile stuck in the bore. Jay (Elite Ammunition) has a video of him breaking down SS197, out of 50 rounds he found a 10% variation in powder charges. On a round that operates at that high of pressure and with a case that small, that’s INSANE! Here is a photo that was posted at fnforums.net of several rounds of SS197 out of one box of 50.... https://i.imgur.com/eSVtxPi.jpg Is is good cheap practice ammo, but I run EVERY ROUND through a cartridge gauge to make sure it meets SAAMI dimensions. Under no circumstance would I trust it for a defensive round. Run either Elite Ammunition or SS198LF which is manufactured by FN in Belgium. |
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