1911 MSH: Arched or Straight


October 14, 2010, 09:37 AM
Which do you prefer on a 1911?

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October 14, 2010, 09:44 AM
Straight. Checkered aggressively, as well. And metal of course. I never understood how Kimber could ever stoop to using plastic main spring housings.

October 14, 2010, 10:10 AM
I agree on checkered metal, either arched or straight. We are shooting 1911's not "plastic Glocks". My preference is for a straight MSH also. :)

October 14, 2010, 10:17 AM
We are shooting 1911's not "plastic Glocks".

I shoot both, but that plastic MSH bothered me. It looked like poor quality plastic, even. The color wasn't even consistent throughout the plastic piece. It was rather fisher-price looking.

October 14, 2010, 10:29 AM
Ed Brown straight with 25lpi checkering.

Vern Humphrey
October 14, 2010, 11:10 AM
Steel mainspring housing, with lanyard loop.

October 14, 2010, 12:31 PM
Bobbed :D

October 14, 2010, 12:42 PM
When using an arched mainspring housing I sometimes find that I won't depress the grip safety far enough. This is never a problem for me using a straight housing.

October 14, 2010, 12:52 PM
I swapped the OEM straight one on my Sig for the arched. MUCH better fit to my hand.


October 14, 2010, 02:06 PM
Arched with a lanyard loop, as well as a short trigger.

October 14, 2010, 02:09 PM
I prefer straight, but I do have one with an arched mainspring housing, and it doesn't bother me.

October 14, 2010, 02:59 PM
I prefer the straight. I just replaced the plastic MSH on my Kimber with a checkered SS. Looks much better!

October 14, 2010, 03:06 PM
Arched--just too many years and too many rounds with an arch. If I shoot a flattie, all my rounds wind up about 6-8" high.

Grooved with lanyard loop, or Pachmyr with checkering. Even have an itty-bitty arched MSH on the Officer's (and kept it as it helps).

October 14, 2010, 03:07 PM
Straight fits ME better.

October 14, 2010, 03:08 PM
My combat commander and Gov't Model are both straight.........and that's how I like 'em.

October 14, 2010, 03:15 PM
I slightly prefer straight with a long trigger. I have arched msh's with short triggers too and they dont bother me. Neither do the few plastic msh's I have, lots of guns have plastic msh's btw, aint just Kimber.

October 14, 2010, 03:33 PM
I spent quite a number of years using the arched MSH.

I modified a MSH and the frame on my Commander back in the 70's to give it a bevel at the bottom. Not as much as the current popular "Bobtail" offerings, but enough to really change the feel and enhance my point shooting capabilities (as well as my normal aimed shooting, of course).

Nowadays I simply go for a flat MSH. My grip technique and wrist lock don't require an arched MSH.

Different folks have different experiences and preferences, which is fine.

October 14, 2010, 03:36 PM
Prefer straight, but can do about as well with either, though I tend to throw shots a little high if I get in a hurry. Also prefer short trigger in spite of having fairly large hands.

October 14, 2010, 04:08 PM
I only have experience with straight ones. Been thinking I'd like to try an arched, as they look comfortable, and I have large hands.

October 14, 2010, 04:47 PM
3 straight, the original arched in parker is in the drawer with the other spare parts.

October 14, 2010, 05:39 PM
Four of my M1911's have straight mainspring housings: Colt Officers Model, Lightweight Commander, Combat Commander, and Lightweight Government. Over the years I just have come to prefer the better grip I have with the flat housing. The only M1911 that still has the arched housing is an early Springfield Armory M1911A1 that I have decided to keep in its original stock configuration.

Jed Carter
October 14, 2010, 07:30 PM
4 straight and 1 arched on a Colt Mk IV series 70 9mm that I bought used. I have no idea if the arched MSH on the Colt is stock or not, any ideas? I do prefer the look of the straight MSH but I really do not feel any difference between the two. I really like fat wood grips vs thin and the RoCo stippled grips with a palm swell are just the handfull I need.

The Lone Haranguer
October 14, 2010, 07:47 PM
The arched MSH is usually accompanied by a short trigger. I have only tried the flat/long combination, but both guns so equipped fit my hand and pointed perfectly, so I never tried anything else.

October 14, 2010, 07:55 PM
:) I voted for flat. It just feels better. Don

Rusty Dusty
October 14, 2010, 08:07 PM
+1 for the arched/ lanyard loop and a short trigger.

October 14, 2010, 09:52 PM
Arched. If you look at a Sig, which most consider to be a comfortable gun, it has a bump down where the arched MSH would be. The newer plastic guns with grip inserts also are not flat.

Loyalist Dave
October 15, 2010, 08:24 AM
I found with an arched main spring housing I get shooter's-palsey, so I have to use a flat msh. Sure I could wear padding pistol shooting gloves, but I couldn't wear them all the time so for SD I opted to modify the 1911A1 for my hand.


The Bushmaster
October 15, 2010, 10:22 AM
Colt series 80 with steel [straight] MSH
Kimber UCC II with plastic [straight] MSH. Didn't realize that it was plastic until I dismantled the gun for cleaning.

October 15, 2010, 12:37 PM
I start out with an arched. Then I file it down and sculpt it until, when I establish my grip, the sights line up straight across on top. The I rechecker it with 20LPI checkering.

What I found is that the flat gave me a sight alignment where the front sight was slightly low. The arched made the front sight slightly high in addition to making me fail to fully depress the grip safety. So I figured, I have files, I have checkering tools and most important a couple of extra arched mainspring housings in case I screwed up.


October 15, 2010, 01:42 PM
stork... let's see some pictures.

October 15, 2010, 02:03 PM
I started out on the arched MSH in USCG boot camp in 1979. I though that was the way it was supposed to be, and my personal gun purchases reflected that.

Then, in the mid 90's I bought a 1911 with a flat MSH and realized I had been an idiot. The flat MSH was so much better that I've never looked back. At about the same time, I discovered the short trigger and that also become incorporated in my 1911 preferences.

I (and most of the 1911 world) have come full circle back to the original design as John Browning first created it.


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