An ergonomically designed safety lever combined with a proper grip eliminates the danger of having the gun accidentally on-safe when you need to fire it.
No. I think that since it requires more pressure, it makes it less likely that an ND could occur. Not that I ever have my finger on the trigger when reholstering that is. Little surprised I have to explain this.
I’ve never thought of deactivating the safety as the issue, rather it is just another mechanism for Mr. Murphy to throw his monkey wrench into.
I understand that on a conceptual level. In practice, I haven’t seen it to be true. There are guns with 60 parts that are as durable and reliable (or more durable and reliable) as other guns with 30 parts.
Yes, the mechanism could suffer a problem at the exact wrong moment. Or something could interfere with you operating it properly. But weighed against that should be the benefits of having a positive manual safety on a pistol from, e.g., a weapons retention standpoint or in the instant topic of discussion, safety in reholstering.
My '08 car has countless more parts and complicated pieces than a car from 20 years ago. It has more things that can go wrong. But I wouldn’t give up, say, airbags just because it adds more parts and is “one more thing that can go wrong.”
Sage words from the expert.
The placement of the M&P safety is such that a normal “modern” thumbs forward grip places your firing hand thumb on top of the safety by default and essentially automatically flicks it off.
Further the design of said safety is perhaps the lest intrusive thumb safety design I am aware of as all it does is “loosely” block the transfer bar from tripping the sear. There’s no critical fitment issues like a 1911 and from examining the design it would be very difficult for something to foul the mechanism to where I would not be able to disengage it. Not saying it’s impossible, but it is highly unlikely.
All in all I am just more comfortable carrying a loaded weapon in the appendix position with a manual safety.
I has the Ehud for a few weeks but the design adds a lot of width to your carry piece. Notice the way the belt hook is attached to the holster, that’s three layers of thick kydex in between your belt and the gun. I would have asked Dale Fricke to make one without the belt hook but the Raven ACR came out, which I feel has better retention, weights less and is much thinner.
I feel dumb because I had to use Wikipedia to figure out where, geographically, the appendix is on a human body, just so I’d know what “appendix carry” is.
As a physician, I think I can help you with this one. Just think of it as SSTN (side of shlong, top of nut) carry 
Your original post led me to believe that you had a heavier trigger to negate ND issues with appendix carry which I didn’t understand.
I have carried my Glock 19 AIWB for years in a FIST #1K Ultra Thin Kydex. Handling firearms takes discipline and diligence… especially when drawing and holstering… kind of like take-off and landing if you fly. Adopting a new style of carry requires practice… and with AIWB there is little room for error. Be safe.
Just a couple of quick items.
1 - I regularly carry my Glock 26 in a Mitch Rosen Clipper AWIB when off duty (I carry my duty pistol strong side hip on duty).
It is very comfortable and I have no fears about ND’s. I will add that I have trained on drawing, firing and holstering from this position for a long time. I previously carried a Kahr K40 (2000 vintage) in this very same manor.
Here is a link to the Holster (it is at the bottom of the page)
2 - If you are left handed is it still “appendix carry”? 
I’ve been carrying appendix carry for a few months now. Using the Looper with an M&P. I guess I’m fortunite that I have a small package so I don’t worry too much about blowing it off…
I’ve been carrying AIWB for about 4 years now. I won’t carry any other way when off duty or plain clothes. I carried my P229R in a Don Hume straight drop leather holster and carry my M&P340 in a kydex holster or with it’s Barami Hip Grips when flying armed and off duty.
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I’ve been carrying a G21SF AIWB since July 07.
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I recommend it as long as you train with it and your body type allows it. Like has been said, plenty can go wrong if you AD/ND re-holstering.
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Dale is a good guy, but I’m not all that warm to his holsters. It’s not the material or quality, but as the others have said it’s the hooks I don’t care for. He has recently come out with two newer versions of the EHUD. Out of the two if I were to try one it would be the ArchAngel.
I’ve been using a HighNoon Hideaway in horse hide since Sept 07 with no complaints.
http://www.onesourcetactical.com/index.asp?PageAction=VIEWPROD&ProdID=1970
http://www.onesourcetactical.com/index.asp?PageAction=VIEWPROD&ProdID=1503
http://www.highnoonholsters.com/Product_Line/_Hideaway_w_strap/_hideaway_w_strap.html
during the summer months I carried my H&K USPc appendix carry in a plain old Galco IWB holster. Once I found the exact spot where it belonged, it was amazingly comfortable and the leather holster didn’t dig-in the way a kydex does. Nice thing about this mode of carry, I could effective conceal my USP wearing shorts and a t-shirt.
I completely agree with everyone else, the safety on my USP was ON before I even thought about holstering.
First I gotta say thanks Todd, when I did the search I only found one tread that hade anything to do with the subject. The thread you posted was GREAT!!!
To everyone else, thanks for the info and being willing to post it again. The amount of and quality of the responses of been amazing. I have like 20 tabs open with the different links to holsters LOL!!!
I do have two more questions, then I am going to sit back and continue to be educated. Just for clarification, the looper can’t be worn with a shirt tucked in? I think I read it right but I just want to ensure I read it right. Lastly, what AIWB (I am learning the abbreviations :D) can be worn w/a tucked in shirt, other than the underpants holster?
Again, thanks guys.
What cal is the USP? I have a 45c and I have read that most holsters for the USP45 fit the 45c (but not the black hawk serpa it kept ejecting my mag:mad:)
I ordered this one a few days ago and will give it a shot. I selected the tuckable version.
http://alabamaholster.com/index.php?p=2_1
I came across those a few months back (been researching this since before I even had a gun LOL!!!) when you get it may you post a review and a few pics? I love gun porn
Anyway, it is bed time. My wife is telling me she will beat my butt if I don’t come NOW!!! LOL!!!
I tried one of Fricke’s Joabs and found it much less concealable than the Raven ACR. Would like some more input on the Alabama holster Appendix offerings when available.