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Posted: 4/14/2015 3:48:17 PM EDT
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I have an SR22, M&P22 (not the compact), and a Sig 1911-22, all with threaded barrels. I'm looking to buy a SilencerCo Sparrow for them. I just want to check a few things before I fork out some cash...
Assumptions: The Sparrow is threaded 1/2-28 My pistols will need a 1/2-28 to 1/2-28 adapters Questions: Why did the manufacturers require adapters if 1/2-28 is standard and not just do a direct thread like 9 mm, .45's ect? What is the actual threading of the barrels themselves? Aren't the threads smaller than 1/2-28? I see 1/2-20 adapters. What are those used on? Thanks for the help =] |
| I believe that the normal barrel Nuts are meant to keep the barrel centered in the slide due to a slightly larger diameter. Since they are not intended for suppressor use, the manufacturer uses whatever thread pattern is convenient. This is good for people with suppressors as you only need to replace this part instead of buying a full threaded barrel. The adapter you buy would be that proprietary thread pattern to 1/2x28. Just buy whichever 1/2x28 adapter fits an m&p22 full size. One for an m&p22 compact will not fit your gun. |
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I don't have the SR22, but I do have the M&P 22 (both models) and the GSG 1911-22 (same as Sig).
For my three the adapter is needed because it the stock barrel threads don't stick out if the slide. The adapter adds the length required, and all of mine also offer the o-ring engagement. I have SiCo adapters on the GSG and full-size 22. The Compact has a version from Twin Tech. |
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Quoted:
I don't have the SR22, but I do have the M&P 22 (both models) and the GSG 1911-22 (same as Sig). For my three the adapter is needed because it the stock barrel threads don't stick out if the slide. The adapter adds the length required, and all of mine also offer the o-ring engagement. I have SiCo adapters on the GSG and full-size 22. The Compact has a version from Twin Tech. I understand that they don't protrude. I was just wondering why they don't. I was mostly referring to this drop down menu BTW http://www.store.silencerco.com/collections/rimfire/products/rimfire-adapters |
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Quoted:
I believe that the normal barrel Nuts are meant to keep the barrel centered in the slide due to a slightly larger diameter. Since they are not intended for suppressor use, the manufacturer uses whatever thread pattern is convenient. This is good for people with suppressors as you only need to replace this part instead of buying a full threaded barrel. The adapter you buy would be that proprietary thread pattern to 1/2x28. Just buy whichever 1/2x28 adapter fits an m&p22 full size. One for an m&p22 compact will not fit your gun. Hmm. Not sure I understand. |
| You don't really have to worry about the thread pattern of the barrel. Just make sure the adapter is intended for your gun specifically. It will be called m&p22 1/2x28 thread adapter. Do the same for the 1911. Dunno about The sr22. Double check because the ones made for the compact will not work for you. I believe The 1/2x28-1/2x28 adapters are meant for rifles with the longer threads. |
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The SilencerCo adapters has the O-Ring engagement part built on the adapters. Some Guns (IE: Walther and Sig Mosquito) come in Odd thread sizes or with funky barrel nuts. If your barrel is threaded in 1/2x28 don't worry to much.... The one Exception is rifles can have longer cut 1/2x28 threads for Flash Hiders (IE AR15) and can put the muzzle too far into the suppressor.
At least that's what I understand. |
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Quoted:
You don't really have to worry about the thread pattern of the barrel. Just make sure the adapter is intended for your gun specifically. It will be called m&p22 1/2x28 thread adapter. Do the same for the 1911. Dunno about The sr22. Double check because the ones made for the compact will not work for you. I believe The 1/2x28-1/2x28 adapters are meant for rifles with the longer threads. I'm not worried about the pattern of the barrel. I'm just trying to understand why. |
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Quoted:
The SilencerCo adapters has the O-Ring engagement part built on the adapters. Some Guns (IE: Walther and Sig Mosquito) come in Odd thread sizes or with funky barrel nuts. If your barrel is threaded in 1/2x28 don't worry to much.... The one Exception is rifles can have longer cut 1/2x28 threads for Flash Hiders (IE AR15) and can put the muzzle too far into the suppressor. At least that's what I understand. Didn't realize that the threads are longer. Thanks for that info. |
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I have a SR22 pistol...forget about getting a thread adapter for it. No one makes one for it due to the REALLY off the wall and crazy thread pitch they put on the barrel. If you want a thread adapter with the SiCo O-ring engagement, you can get a barrel from Twin Tech that comes with it or that is threaded for a thread adapter that has it. If you want, some machinists can re-thread the factory barrel to a more common thread pitch and go from there. I just went with getting a barrel from Twin Tech and sold off my factory barrel to offset the cost of the new barrel. YMMV and all that jazz.
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Assumptions:
The Sparrow is threaded 1/2-28 My pistols will need a 1/2-28 to 1/2-28 adapters Correct the Sparrow is threaded 1/2-28 Incorrect. Your handguns require adapters but not the 1/2-28 to 1/2-28 adapter... See below for further explanation. Questions:
Why did the manufacturers require adapters if 1/2-28 is standard and not just do a direct thread like 9 mm, .45's ect? What is the actual threading of the barrels themselves? Aren't the threads smaller than 1/2-28? I see 1/2-20 adapters. What are those used on? Making a .22LR barrel the diameter needed to have 1/2-28 threads is a waist of material, would make the handgun heavier and more expensive. Some do it most don't. Not everyone wants a suppressor. Treading on the SR22 is M8.25x1.0. THe M&P is M8x.75 and the SIg 1911 looks to be M9 x 0.75 You need a Walther P-22 adapter for your M&P22. The 1911 has the same thread pitch as the Sig Mosquito; I would call Silencerco to see if the Mosquito adapter would fit the 1911. Doesn't look like Silencerco has an adapter for the SR22 but I found one from Twin Tech Tactical for the Sparrow. http://www.twintechtactical.com/SR22-Barrel-adaptors.html To clarify, the 1/2-28 to 1/2-28 adapter is for those who have rifle with 1/2-28 threaded barrels because the Sparrow has an o-ring that standard 1/2-28 threading does not properly engage it. |
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Quoted:
Correct the Sparrow is threaded 1/2-28 Incorrect. Your handguns require adapters but not the 1/2-28 to 1/2-28 adapter... See below for further explanation. Making a .22LR barrel the diameter needed to have 1/2-28 threads is a waist of material, would make the handgun heavier and more expensive. Some do it most don't. Not everyone wants a suppressor. Treading on the SR22 is M8.25x1.0. THe M&P is M8x.75 and the SIg 1911 looks to be M9 x 0.75 You need a Walther P-22 adapter for your M&P22. The 1911 has the same thread pitch as the Sig Mosquito; I would call Silencerco to see if the Mosquito adapter would fit the 1911. Doesn't look like Silencerco has an adapter for the SR22 but I found one from Twin Tech Tactical for the Sparrow. http://www.twintechtactical.com/SR22-Barrel-adaptors.html To clarify, the 1/2-28 to 1/2-28 adapter is for those who have rifle with 1/2-28 threaded barrels because the Sparrow has an o-ring that standard 1/2-28 threading does not properly engage it. Quoted:
Assumptions:
The Sparrow is threaded 1/2-28 My pistols will need a 1/2-28 to 1/2-28 adapters Correct the Sparrow is threaded 1/2-28 Incorrect. Your handguns require adapters but not the 1/2-28 to 1/2-28 adapter... See below for further explanation. Questions:
Why did the manufacturers require adapters if 1/2-28 is standard and not just do a direct thread like 9 mm, .45's ect? What is the actual threading of the barrels themselves? Aren't the threads smaller than 1/2-28? I see 1/2-20 adapters. What are those used on? Making a .22LR barrel the diameter needed to have 1/2-28 threads is a waist of material, would make the handgun heavier and more expensive. Some do it most don't. Not everyone wants a suppressor. Treading on the SR22 is M8.25x1.0. THe M&P is M8x.75 and the SIg 1911 looks to be M9 x 0.75 You need a Walther P-22 adapter for your M&P22. The 1911 has the same thread pitch as the Sig Mosquito; I would call Silencerco to see if the Mosquito adapter would fit the 1911. Doesn't look like Silencerco has an adapter for the SR22 but I found one from Twin Tech Tactical for the Sparrow. http://www.twintechtactical.com/SR22-Barrel-adaptors.html To clarify, the 1/2-28 to 1/2-28 adapter is for those who have rifle with 1/2-28 threaded barrels because the Sparrow has an o-ring that standard 1/2-28 threading does not properly engage it. Thanks for the reply. Not everyone wants a suppressor? That's why Ruger makes one threaded and one that isn't threaded. Dug through the box. I'm stupid. It came with an adapter. Seems like you're right about the M&P, but the 1911 takes the G&G Adapter. It also appears that the 1/2-28 to 1/2-28 is to accommodate for rifles having a longer thread than pistols. |
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