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User Panel
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Posted: 2/19/2024 12:57:39 PM EDT
Does anyone make a AR pistol in 357 Sig with a 10.5” barrel?
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NC, USA
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Posted: 2/20/2024 7:19:53 AM EDT
[#1]
Unless you reload I'd pass. A Speer rep told us at a match that they were dropping the caliber unless it was special ordered, and would be on limited runs. Most LEO are dropping due to this. The largest agency here in NC is transitioning to 9mm this year.
That said, I love the caliber and looked for a PCC a few years ago but could not find one, so I gave up. |
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Posted: 2/20/2024 8:35:52 AM EDT
[#2]
That’s good info from Speer. I have a lot of ammo. That’s one of the reasons I was wanting to try this.
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IA, USA
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Posted: 2/20/2024 11:03:28 PM EDT
[#3]
except for smaller mags, how is a 357sig ar pistol any better than 300blk ar pistol?
just curious. |
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Posted: 2/20/2024 11:18:25 PM EDT
[#4]
Quote HistoryOriginally Posted By racer765: except for smaller mags, how is a 357sig ar pistol any better than 300blk ar pistol? just curious. It’s probably not. I have ar pistols in 556/223, 300blk, 9mm and 22lr. I have gotten to where I mostly carry a 31 Glock in 357 Sig. I like the caliber and have amassed a lot of 357 Sig ammo. I know you can duplicate it with 9mm+p+ and also have more capacity. Heck I watched a video from Australia where a guy had a pump ar in 308. Now I’m kinda wanting one of those. It’s just a want thing. |
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Posted: 2/20/2024 11:33:04 PM EDT
[#5]
I swear I've seen one but can't remember what it was. I don't know how it would handle blowback but any gun that has a 40 and 9 option you might be able to figure it out. 40 bolt and a 9mm barrel reamed to 357 Sig.
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IA, USA
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Posted: 2/20/2024 11:39:11 PM EDT
[#6]
Quote HistoryOriginally Posted By FatCat1: It’s probably not. I have ar pistols in 556/223, 300blk, 9mm and 22lr. I have gotten to where I mostly carry a 31 Glock in 357 Sig. I like the caliber and have amassed a lot of 357 Sig ammo. I know you can duplicate it with 9mm+p+ and also have more capacity. Heck I watched a video from Australia where a guy had a pump ar in 308. Now I’m kinda wanting one of those. It’s just a want thing. I built a vf500f racebike back in the day because "I wanted to" so I get it. sounds doable. get a Glock mag lower for .40sw, build an upper with a 9mm barrel, have a gunsmith ream it for 357sig, enjoy your unicorn. my unicorn has been in a storage unit for 23 years, I get it. this is America, all you need to say is "because I want to and it's my money" just post pics and results for the rest of us to enjoy... |
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Posted: 2/21/2024 1:39:31 AM EDT
[#7]
Quote HistoryOriginally Posted By racer765: I built a vf500f racebike back in the day because "I wanted to" so I get it. sounds doable. get a Glock mag lower for .40sw, build an upper with a 9mm barrel, have a gunsmith ream it for 357sig, enjoy your unicorn. my unicorn has been in a storage unit for 23 years, I get it. this is America, all you need to say is "because I want to and it's my money" just post pics and results for the rest of us to enjoy... Is a 40 lower different than 9? I didn’t think so. Maybe an ejector setup or something? Needs a 40 bolt. |
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Posted: 2/21/2024 6:32:04 PM EDT
[#8]
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USA
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Posted: 2/29/2024 10:54:49 PM EDT
[#9]
Quote HistoryOriginally Posted By racer765: except for smaller mags, how is a 357sig ar pistol any better than 300blk ar pistol? just curious. Some people like variety |
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OH, USA
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Posted: 3/3/2024 5:03:04 PM EDT
[#10]
Have built a few over the years.
Rechambered 9mm barrel with 40 carrier and a dampened captured buffer system if you are going straight blowback. Just a heavier buffer does not fix the cycling issues. Had the best cycling luck with 6.5” to 8.5” barrels. Couldn’t keep the ejection gasses down with 10” and longer barrels. I tried one of the DI uppers and could not get it to time well with a BFSIII. But that could have just been my arthritis. Hope this helps and good luck. |
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Posted: 3/11/2024 5:30:32 PM EDT
[#11]
Quote HistoryOriginally Posted By iGottaDropADuce: https://moriartiarmaments.com/ar-357-sig-moriarti-arms-8-slick-glock-style-pistol-lrbho-ma-357sig-8 From the above link: “PLEASE NOTE: DUE TO NATURE OF THE PRODUCT AND VAST MAJORITY OF AMMO AVAILABLE, MORIARTI CANNOT GUARANTEE CONTINUOUS PERFORMANCE OF 357 SIG WITH PERSONAL DEFENSE AMMUNITION INCLUDING HOLLOW POINT AND RELOADS.” I don’t know about anyone else, but their own disclaimer does not inspire much confidence in me. |
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MN, USA
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Posted: 3/11/2024 6:13:01 PM EDT
[#12]
Quote HistoryOriginally Posted By Big-Bore: From the above link: “PLEASE NOTE: DUE TO NATURE OF THE PRODUCT AND VAST MAJORITY OF AMMO AVAILABLE, MORIARTI CANNOT GUARANTEE CONTINUOUS PERFORMANCE OF 357 SIG WITH PERSONAL DEFENSE AMMUNITION INCLUDING HOLLOW POINT AND RELOADS.” I don’t know about anyone else, but their own disclaimer does not inspire much confidence in me. Ya, that's a big red flag for me as well. |
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