I agree. That said, I see no harm in reducing the amount of rubbing taking place.
MP22 Compact thread adapters
- Thread starter strobro32
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I agree. That said, I see no harm in reducing the amount of rubbing taking place.
Sure, if you are happy with the factory setup, then go for it. I'd say any answer from S&W will be there is nothing wrong with it. (Which others have found out already sending Compacts back to them complaining about the rubbing issue) S&W seems very reluctant to release inside track info, so I doubt we can get the exact inside track on this...shoot, when I was buying tooling out of the Houlton plant a few years back, couldn't get much more than the tooling and I think that's a pretty good inside track...I think the guy was the manager if I remember right?
I too would love to know S&W's thinking behind this design...everything that is running through my mind isn't making sense! One comparison I have heard is that to of a 1911...but that is steel on steel, and the barrels are straight and don't have a step in them like the compacts do.
Also a 1911 is a completely different design than the compact-the 1911 has a floating barrel that locks up in the slide, so we need there to be angular displacement between the parts for it to work.
The compact has a fixed barrel with a straight blow back action, so why would we want angular displacement of the slide? The more square the bolt face is to the breech, the better...no aluminum to metal contact...no "step" the slide is having to ride up...
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Just got my Compact back from Smith last night from UPS. Do to my sight blade fly off over 3 weeks ago at the ranch.
Put the new centering bushing on the Compact last night. Head out to the ranch to readjust the sight. End up stripping the windage screw. Because they put glue on the Adjustment windage screw. Call up Smith customer service and explain the problem that the person put LOCTITE glue cause stripping the screw and allen key. They are send me a fedex label for the 3rd times in 2 month.
After I install the bushing, I had few won't eject all the way out cause stovepipe. It this normal for the bushing?
Put the new centering bushing on the Compact last night. Head out to the ranch to readjust the sight. End up stripping the windage screw. Because they put glue on the Adjustment windage screw. Call up Smith customer service and explain the problem that the person put LOCTITE glue cause stripping the screw and allen key. They are send me a fedex label for the 3rd times in 2 month.
After I install the bushing, I had few won't eject all the way out cause stovepipe. It this normal for the bushing?
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Been lurking here for a few days and I thought I would add my insight. Here's my opinion, for what it's worth.
1) Bushing rubbing on bottom of slide -- This is how the gun is designed. The barrel isn't rubbing on the bottom of the slide, the bottom of the slide is rubbing on the barrel. Unlike a GLOCK, there are no rails on the front of the slide. Literally, the belled barrel bushing (or adapter if you replace it) is what acts as the front slide rail. It is this way on the Walther PP series as well as hundreds of other designs. Rule of thumb is that if your gun disassembles by pulling the slide back and lifting up, then the bottom of your slide probably rubs against the barrel. It isn't the barrel tilting down when you take the slide off, it's the slide tilting up.
2) The fouling on the inside of the hex flats inside the EWK adapter -- virtually a non-issue. When you insert the allen key, it pushes the fouling out of the way. Just make sure you clean the threads and barrel after you take it off. As far as it getting fouled enough to cause baffle strikes... WHAT? The inside of ANY adapter can foul, and there are several with less clearance than the EWK. Just the fact that you must remove the adapter to disassemble the gun means that it will get taken off (with the Allen wrench) and that will clear any fouling long before it gets thick). Again, no more an issue than with any other adapter.
3) The wrench -- I am taking a 10mm Bicycle wrench that is thin enough and filing about .5mm off one side. Done. Only plan on using it once to get the thing of then leaving it in the box if I ever decide to reattach (of course, why would I?).
1) Bushing rubbing on bottom of slide -- This is how the gun is designed. The barrel isn't rubbing on the bottom of the slide, the bottom of the slide is rubbing on the barrel. Unlike a GLOCK, there are no rails on the front of the slide. Literally, the belled barrel bushing (or adapter if you replace it) is what acts as the front slide rail. It is this way on the Walther PP series as well as hundreds of other designs. Rule of thumb is that if your gun disassembles by pulling the slide back and lifting up, then the bottom of your slide probably rubs against the barrel. It isn't the barrel tilting down when you take the slide off, it's the slide tilting up.
2) The fouling on the inside of the hex flats inside the EWK adapter -- virtually a non-issue. When you insert the allen key, it pushes the fouling out of the way. Just make sure you clean the threads and barrel after you take it off. As far as it getting fouled enough to cause baffle strikes... WHAT? The inside of ANY adapter can foul, and there are several with less clearance than the EWK. Just the fact that you must remove the adapter to disassemble the gun means that it will get taken off (with the Allen wrench) and that will clear any fouling long before it gets thick). Again, no more an issue than with any other adapter.
3) The wrench -- I am taking a 10mm Bicycle wrench that is thin enough and filing about .5mm off one side. Done. Only plan on using it once to get the thing of then leaving it in the box if I ever decide to reattach (of course, why would I?).
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Can you share your thoughts with the Twin Tech adapter? I've been trying to find an adapter for my M&P22 Compact. So far I've tried the:
- SilencerCo adapter (indexes on the end of the barrel instead of the shoulder, and tightening it chews up the threads at the muzzle)
- EWK adapter (ragged threads on mine chewed up whatever it was screwed on or in, and wasn't made to SilencerCo's specs)
I'd buy the Stalking Rhino version if it was available, but I don't know when that will be. So it looks like the only other options are TROS and Twin Tech (which is $40 cheaper). So I was hoping you or someone else could share your experiences.
Namely:
- does it index off the front of the barrel, or the shoulder?
- are the threads clean, any burrs or anything?
- is the o-ring engagement a snug fit? It should be .440 +/- .002 diameter. I think I measured around .434 on my EWK. It doesn't sound like a huge difference, but the suppressor was a lot looser on the EWK than the SilencerCo adapter.
Wait - can you explain in more detail what happened with the EWK adapter? Did it chew up your suppressor threads?!
No, it didn't damage the threads, it put nicks in the o-ring in the SilencerCo thread protector. That's when I realized I needed to clean up the burrs on the external threads. But there were more burrs on the internal threads that stopped it from going further than maybe 3/2rds or so onto the barrel. That, plus the undersize o-ring engagement diameter brought me here looking for another adapter. I've been lurking on this site, and this thread is what lead me to the various M&P22 Compact adapters initially. Hopefully someone will provide some feedback on the Twin Tech adapter.
Just like yours, the threads needed to be cleaned up. Plus the o-ring engagement diameter was undersized which meant the fit isn't as snug as an adapter that's made according to SilencerCo's specs. If you cleaned up your threads and tried your adapter, it's probably fine. Although I'd be curious to know what your o-ring engagement diameter is (should be .440" +/- .002).
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Did you not have the EWK protector that came with the adapter?
I did, but since I also had a SilencerCo thread protector, I figured I'd use that since it's nicer and has the o-ring engagement.
I don't want to derail the thread. My experience with the EWK adapter wasn't ideal, but maybe I got a bad one or it's better suited for people with more patience than me or whatever. Ok, I moved on, and if anyone has an EWK adapter and it's working for you, then it's probably fine.
Back to my previous question - if anyone is using a Twin Tech adapter, what are your thoughts after using it?
- does it index off the front of the barrel, or the shoulder?
- are the threads clean, any burrs or anything?
- is the o-ring engagement a snug fit? It should be .440 +/- .002 diameter
Or maybe there's another adapter out there (with the SilencerCo o-ring engagement) that hasn't been mentioned?
Not really a derailing. Very interesting to hear people's experiences.
Anyway, it sounds like at least some of the issue is you bought the wrong EWK thread adapter, since they sell two - one without O-ring engagement and one with.
Anyway, to get back on track (for you), I don't know the answer to your Twin Tech adapter question, but maybe someone else does. Hopefully they will respond here.
My EWK adapter has the unthreaded o-ring area. There were two types presented when I made my selection.I don't have tools to measure to that detail. Being arthritic and completely uncoordinated, any tool is wasted on me beyond being an expensive aid to damaging something.
I wish that were true and then I'd just buy the right adapter. But I did buy the one with o-ring engagement. The burrs at the end of the threads still made contact with the o-ring.
As annoying as the problems with the EWK adapter were, even more frustrating is that the SilencerCo adapter would be perfect if it was just a few hundredths of a inch longer so it would index on the barrel shoulder. When I tightened the SilencerCo adapter down, it started taking a sliver off the barrel thread. SilencerCo says that it's supposed to index off the front of the barrel because that's what S&W told them. But then you're left with the option of damaging the threads, or risking a baffle strike because the adapter wasn't screwed on tight enough.
I see. *sigh*
It's a shame that in 2015 - gun accessories still don't work right for some of us.
I've already put mine (EWK & Sparrow) away after cleaning, but I'll have a look myself at the o-ring and report back. I'd like to think that if there is a problem, it can be converted to constructive feedback for EWK, and they would resolve it.
I purchased one of these (EWK/ sparrow specific), and no the protector does not have the o-ring. That was my main complaint, as the protector worked loose in one session, and had to be chased down. That is a weakness.
As I understand it, the protector itself never has an o-ring. It has an o-ring "engagement."
sdl74,
Dragged out the hardware, disassembled the sparrow, got out the flashlight.
The EWK (sparrow specific) adapter threads don't hit the o-ring, which has no damage, but you are correct, it is not particularly snug.
You've challenged me now to buy the proper tool and measure. We'll see as the week progresses
But, I will thank you for bringing this out. Why? I have two other .22s that this will be used with. The adapter provided for one does not have the shoulder, so have ordered the silencerco version for that. Expensive little chunks of metal. Your question kept me from accidentally tearing up the o-ring.
The 10/22 is the other. In looking at this, I discovered the same issue, and explains the un-mentioned spacer in the Sparrow box. But it seems that one won't be the correct thickness, so more research in order.
So, after I settled down from the aggravation of having to buy even more parts and tools for something that should have been easy, I decided I should offer a thank-you for the research.
That is going to require a little more explanation. There is nothing in the protector to engage anything other than the threads. It shakes loose easily.
I'm a bit confused. The thread protector comes off the thread adapter? Are we using the correct terminology here? The thread adapter is the piece that screws onto the barrel. The thread protector is the "ribbed" piece that screws onto the thread adapter.
I just want to make sure we're on the same page here. To me it sounds like you're saying the EWK thread protector shakes off the EWK thread adapter (i.e. when shooting un-suppressed).
FYI, I'm not surprised anything works itself loose. I have a Gemtech adapter on my M&P .22 FS, coupled with a Spectre II, and I have to tighten the suppressor down after every magazine. Gotta love that...
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