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Why do people think MIM parts are no good?

Scevaph

Elite
Since getting back to 1911's and getting my Ronin I have been looking at older conversations and seeing a lot of back and forth about MIM parts. Kimber's bad because of all the MIM, ditto for RI, Springfield, Colt, Ruger. MIM, when done correctly, makes a good part. It has been used in aerospace for decades, S&W changed to MIM for their hammers and triggers some time back with a few early issues but refined until they require less fitting and are holding up well ( Not as pretty as the old forged, machined case hardened one though) Colt has used MIM even longer then S&W. If S&W, Colt etc trusts MIM for high stress parts like the hammer and trigger I think I'll trust it for parts on my Springfield. I have looked at my Ronin's Slide stop, Hammer, Grip safety etc and I have no complaints. Besides; if a part breaks I have a life time warranty.
 
Early MIM had many issues, on S&W revolvers, you have to be very careful if doing a trigger job, or on a 1911, MIM parts are just surfaced hardened, not like a forged part. If properly done right, MIM should be no problem, extensive dry firing any striker pistol with no snap cap could break the MIM firing pin, not just on Sig, but Springfield also plus others, MIM is just easier and more cost efficient for gun manufacturing due to little fitting required
 
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Early MIM had many issues, on S&W revolvers, you have to be very careful if doing a trigger job, or on a 1911, MIM parts are just surfaced hardened, not like a forged part. If properly done right, MIM should be no problem, extensive dry firing any striker pistol with no snap cap could break the MIM firing pin, not just on Sig, but Springfield also plus others, MIM is just easier and more cost efficient for gun manufacturing due to little fitting required
No dry firing involved, broke using live ammo and smug customer service. Pistol was never dry fired. Sig motto: Cheap to build but expensive to purchase.
 
Since getting back to 1911's and getting my Ronin I have been looking at older conversations and seeing a lot of back and forth about MIM parts. Kimber's bad because of all the MIM, ditto for RI, Springfield, Colt, Ruger. MIM, when done correctly, makes a good part. It has been used in aerospace for decades, S&W changed to MIM for their hammers and triggers some time back with a few early issues but refined until they require less fitting and are holding up well ( Not as pretty as the old forged, machined case hardened one though) Colt has used MIM even longer then S&W. If S&W, Colt etc trusts MIM for high stress parts like the hammer and trigger I think I'll trust it for parts on my Springfield. I have looked at my Ronin's Slide stop, Hammer, Grip safety etc and I have no complaints. Besides; if a part breaks I have a life time warranty.
Yet, none of the high-end makers use MIM…and Springfield doesn’t use them in their Professional models, either.

So…while they might be “good enough”, they aren’t as good as tool steel.
 
There’s probably a carry over from the first generation MIM were to be desired. We have moved way past that some people hold onto old tales.

The fact of the matter most people that “bi$&h” about MIMs aren’t they type of shooters that are going to wear them out anyway.

I had a used Springfield Mil Spec 1911 that was my Father’s Day gift in 1992 I shot thousands of rounds through without any MIM breakage.

I have a year old new SA Operator I have about 1,500 rounds through and amazingly no parts breakage. And Ditto for a couple newer S&W revolvers (with the lock gasp) that I have several thousand rounds through and no MIM parts breakage and no the lock has never got activated through recoil and tie up the action like the internet said would.happen!

people just hear something and run with it without even knowing. It happened once but is repeated thousands

Reminds me of that line “that one time at band camp”!!!
 
Since getting back to 1911's and getting my Ronin I have been looking at older conversations and seeing a lot of back and forth about MIM parts. Kimber's bad because of all the MIM, ditto for RI, Springfield, Colt, Ruger. MIM, when done correctly, makes a good part. It has been used in aerospace for decades, S&W changed to MIM for their hammers and triggers some time back with a few early issues but refined until they require less fitting and are holding up well ( Not as pretty as the old forged, machined case hardened one though) Colt has used MIM even longer then S&W. If S&W, Colt etc trusts MIM for high stress parts like the hammer and trigger I think I'll trust it for parts on my Springfield. I have looked at my Ronin's Slide stop, Hammer, Grip safety etc and I have no complaints. Besides; if a part breaks I have a life time warranty.
the one and only part i change out on ANY 1911, is the MSH, IF it is "plastic"..i just have no confidence in that part.

all other parts of a 1911, can be MIM, and yes, many are, and if one breaks, i'll either replace it myself, or ship it back for repairs.

no one company is "bad" overall, just a person's opinion either on actual experiences with THAT company, or
"hearsay" from others.

i have owned, Rock Island, Girsan, Tisas, and never any issues with them, i have sold them, to cull my herd of guns.

but i have also sold other guns, with no qualms on doing so.....

there are "purists" in everything, one being "Harley-Davidson" that "it must be 1000% American built, American parts etc...

uh......there ARE foreign made parts......in Harleys...........so much for being 1000% American......


Harleys sold in the U.S. are indeed assembled in one of four plants located in Wisconsin, Missouri and Pennsylvania. But the brakes and clutch are imported from Italy, the engine pistons are made in Austria, the bike suspension comes from Japan, and other electronic components originate in Mexico and China.

 
the one and only part i change out on ANY 1911, is the MSH, IF it is "plastic"..i just have no confidence in that part.

all other parts of a 1911, can be MIM, and yes, many are, and if one breaks, i'll either replace it myself, or ship it back for repairs.

no one company is "bad" overall, just a person's opinion either on actual experiences with THAT company, or
"hearsay" from others.

i have owned, Rock Island, Girsan, Tisas, and never any issues with them, i have sold them, to cull my herd of guns.

but i have also sold other guns, with no qualms on doing so.....

there are "purists" in everything, one being "Harley-Davidson" that "it must be 1000% American built, American parts etc...

uh......there ARE foreign made parts......in Harleys...........so much for being 1000% American......


Harleys sold in the U.S. are indeed assembled in one of four plants located in Wisconsin, Missouri and Pennsylvania. But the brakes and clutch are imported from Italy, the engine pistons are made in Austria, the bike suspension comes from Japan, and other electronic components originate in Mexico and China.


Mentioning vehicles I got a laugh because my Father in law is on that purist time but he doesn’t know what he doesn’t k ow (and won’t believe factual articles from factual publications)

He is a pro USA made guy which I respect however in the global economy that isn’t gonna happen with 100% stuff very often (at least with vehicles) he bashes Toyota and any other “foreign” born product even though Toyota has much more % made in USA then his beloved Ford or Chevy or Dodge. And same with HD but he’s a denier.

He also wanted to have some “valves” on a lawn mower redone and when my buddy who owns a mower shop told him it was a lot cheaper to replace the whole e as it’s to much labor intense (and today is a disposable item because of that lost art) he got mad and paid like 1,800 to a shade tree mechanic for one valve and ended up having to buy a new mower over it instead of about 900 for a new engine but some folks are stuck in 1965
 
Mentioning vehicles I got a laugh because my Father in law is on that purist time but he doesn’t know what he doesn’t k ow (and won’t believe factual articles from factual publications)

He is a pro USA made guy which I respect however in the global economy that isn’t gonna happen with 100% stuff very often (at least with vehicles) he bashes Toyota and any other “foreign” born product even though Toyota has much more % made in USA then his beloved Ford or Chevy or Dodge. And same with HD but he’s a denier.

He also wanted to have some “valves” on a lawn mower redone and when my buddy who owns a mower shop told him it was a lot cheaper to replace the whole e as it’s to much labor intense (and today is a disposable item because of that lost art) he got mad and paid like 1,800 to a shade tree mechanic for one valve and ended up having to buy a new mower over it instead of about 900 for a new engine but some folks are stuck in 1965
as you say, and many of us know, and i'm certain i am older the in FIL, is that it is indeed a "global" world as far as well...anything.

nearly all the "foreign" car makers are here in the states, and have been for decades now.

so what the money goes back to the father/mother homeland..people here are earning money building, repairing, selling those "foreign" companies, as the foreign companies are earning money from our American companies moving over to them...!!

i once bought a Chevy GEO Prizm, a "clone" to the Toyota Corolla.....BOTH made here in the USA, in CA.

it has BOTH chevy AND toyota parts.....

anyway, you can't change the minds of "closed minded" people....

i hope he knows too, that when he's buried someday, that casket he's gonna be buried in...??

might have been made in.....Turkey.....!!!!!!!!............. :LOL: :eek: :ROFLMAO:
 
as you say, and many of us know, and i'm certain i am older the in FIL, is that it is indeed a "global" world as far as well...anything.

nearly all the "foreign" car makers are here in the states, and have been for decades now.

so what the money goes back to the father/mother homeland..people here are earning money building, repairing, selling those "foreign" companies, as the foreign companies are earning money from our American companies moving over to them...!!

i once bought a Chevy GEO Prizm, a "clone" to the Toyota Corolla.....BOTH made here in the USA, in CA.

it has BOTH chevy AND toyota parts.....

anyway, you can't change the minds of "closed minded" people....

i hope he knows too, that when he's buried someday, that casket he's gonna be buried in...??

might have been made in.....Turkey.....!!!!!!!!............. :LOL: :eek: :ROFLMAO:

Son arguments aren’t worth it. He wants to be antiquated there’s no law against it it’s his money next Tim he needs a valve redone LOL
 
Son arguments aren’t worth it. He wants to be antiquated there’s no law against it it’s his money next Tim he needs a valve redone LOL
"son"...???

if i only were that young again.............

i Baptised Jesus.

i showed God, how the part the Red Sea....

i was one of the original 3 Wise Men....

and i bake up extra gooey-fudgy brownies for the grand kids...which in time, they will break out in thousands of zits.....
 
Because some of us came up on forged and milled parts, of which the only close comparison is wire EDM or billet parts.

Everybody has a preference, but compared to the old days, MIM parts are a necessary evil because they're CHEAP, they are not now, nor will they ever be the quality of those that came before.
 
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