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Posted: 10/24/2022 9:35:58 AM EDT
[#1]
The Cutts Compensator on the Thompson certainly seems to help
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Posted: 10/24/2022 9:48:24 AM EDT
[#2]
The available Griffin EZ Brake appears to redirect gas 360-degrees radially outwards from the muzzle, so I don't think it would provide any compensating effect against muzzle rise, just general recoil reduction. I guess the Cutts does demonstrate there is enough pressure/gas to have some effect though, whether that be general recoil reduction or directional compensation.
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Posted: 10/24/2022 12:34:18 PM EDT
[#3]
I have shot my M11/9 in multiple configurations with a comp, brake, flash hider, and nothing on the muzzle. I really do not notice any difference in recoil or handling. And that’s with a “high pressure” 9mm and a barrel in the 6” to 8” range.
A .45 ACP runs at much lower pressure and will “work” the comp even less effectively. I have known some USPSA shooters who ran a comped .45 back in the day. They had to use the lightest bullets they could find (155 gr. LSWC that looked like a thumbtack) and as much of the slowest powder they could stuff in the case in order to generate enough gas pressure and volume to make it worthwhile. Standard 230 gr. ball ammo just didn’t do much with the comp. The Thompson is a heavy SOB. The weight alone is enough to keep the muzzle from climbing. If you tried shooting TSMGs back to back, one with a Cutts comp and one without, you would be hard pressed to tell which shot softer. True, the Cutts comp creates a visible jet shooting up from the ports. It looks pretty neat, but doesn’t really do anything for the feel of the gun. Just my limited experience. YMMV. I'm contemplating using a Plan A suppressor mount for SMG use, but they only offer a flash hider and a muzzle brake in .45-caliber. So the short version is to get the one that looks best to you. Because “looks” is all it’s going to do for you. |
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Posted: 10/24/2022 1:27:53 PM EDT
[#4]
Quote HistoryQuoted: The Cutts Compensator on the Thompson certainly seems to help The Beretta 38A 9mm SMG has a four-slot compensator, that thing barely moves when fired.  Italy's Sleeper Submachine Gun: The Beretta 38A |
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Posted: 10/24/2022 1:30:54 PM EDT
[#5]
The easiest compensator for my m11 was using a suppressor.
That helped immensely. https://www.youtube.com/shorts/5bE-9-FWFxI |
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Posted: 10/24/2022 4:04:15 PM EDT
[#6]
Quote HistoryQuoted: The Cutts Compensator on the Thompson certainly seems to help That is contrary to my personal observations. I used to have a WWII era Model 1928 Thompson SMG - Cutts comp and heavy bolt for low rate of fire. Many an experienced shooter embarrassed themselves turning that SMG into an anti-aircraft gun. One guy in particular; who was an owner of a SWD M11/9 and very experienced SMG shooter, though never had shot a Thompson, put the last half of a 50 round drum into the ceiling of the indoor range we were at. ETA: It is my possibly mistaken understanding that the U.S. military deleted the Cutts from the Thompson when the M1 was introduced to reduce overall length, reduce weight, reduce cost; and the Cutts did not aid accuracy, in fact, the gas plume from the Cutts vents obscured the front sight and reduced accuracy. MHO, YMMV. etc. Be well. |
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Posted: 10/24/2022 6:29:38 PM EDT
[#7]
Had an M-11 with all the Lage goodies and have a FA CMMG RDB 9mm currently…
I would usually shoot the Max-11/9 suppressed and the Max-31 with compensators only. Never felt a difference. Especially compared to the cycling weight. THE most important thing is balancing the ROF to the weight of the gun for a blow back SMG by tuning the spring and bolt weight to work together. When you get it just right the gun runs like a sewing machine; the forward lurch cancels the recoil and the sights settle right back down to POA every shot keeping all the rounds in a tiny group. IMO, subguns are too heavy and there’s too little gas to make a meaningful impact. You should focus on flash, cool looks, and reduced concussion (or suppressor mount design). |
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Posted: 10/25/2022 2:16:29 AM EDT
[#8]
The rumor I heard is it makes a noticeable difference with destroyed fins on a Reising vs an intact one.
At face value that seems reasonable as the Reising is nearly half the weight of a Thompson but still with a high rate of fire. |
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Posted: 3/11/2023 7:11:06 PM EDT
[#9]
My mini UZI has a barell with the cutts that seems to help keep muzzle rise down.
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Posted: 3/11/2023 10:05:06 PM EDT
[#10]
I put an aggressive brake on a 7.62x25 m16 upper. I had to take it off because it would push the barrel down hard. It was weird having to pull up on the barrel
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Posted: 3/12/2023 10:39:24 AM EDT
[#11]
Quote HistoryQuoted: My mini UZI has a barell with the cutts that seems to help keep muzzle rise down. I tried other full auto 9mm and can't tell a difference. I also tried a full auto Glock and can't tell a difference either. I was shooting at paper and my groups are about the same. Now I know IMI and Glock makes factory compensated barrels so I would think they should work. I just can't tell. I can definitely see it working for rifle calibers and 45ACP and also 40SW in full auto. I just don't think 9mm has enough gas.....maybe just me and my circle of friends but we can't tell. |
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Posted: 3/12/2023 3:57:24 PM EDT
[#12]
I think the clear answer is yes, comps and brakes work, but their ability to make a difference we notice with pistol calibers is grossly overshadowed by the rest of the design and the weight of the reciprocating mass. An MP5 is way smoother than a Sten. So once you get to the smoothness of MP5 level, is that comp or brake even noticeable? Is there anything left to tame? So it’s basically moot on both ends of the spectrum, but if you want to notice it, you need to have already removed as much of the other crude design first. It’s like race cars, a lot of stuff doesn’t really matter unless you are at a certain high level of performance.
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Posted: 3/12/2023 10:41:04 PM EDT
[#13]
When I was trying to decide if I wanted the RDP version of the Springfield Hellcat (the one with the compensator), I watched a YouTube video where the author compared the compensated one with the non-compensated one, and there was a max angle difference between the two.
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Posted: 3/13/2023 12:31:12 AM EDT
[#14]
Quote HistoryQuoted: I think the clear answer is yes, comps and brakes work, but their ability to make a difference we notice with pistol calibers is grossly overshadowed by the rest of the design and the weight of the reciprocating mass. An MP5 is way smoother than a Sten. So once you get to the smoothness of MP5 level, is that comp or brake even noticeable? Is there anything left to tame? It definitely helps on a PPSh-41 despite having a pretty crude one. It lets me hold a 3-round burst on a torso out to about 100m. A sound suppressor is definitely my favorite muzzle device for a SMG. 
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