1911 sear pin question

Driswalds · 09-07-2021, 10:02 AM

I ordered a Kimber ambi safety that I intended to install on a Chiappa 1911.
It comes with a new sear pin to hold the right hand side on.
The pin was to large to fit in the frame. I did install it on a Kimber I had with no issue.
Is it just a tight fit and I need to ream the frame on the Chiappa?
And what size reamer would I need?

Sanders · 09-07-2021, 10:21 AM

What kind of finish is on the Chiappa? Could it just be parkerizing or coating in the hole making it tight? I’d look at polishing the hole before reaming the frame.

Driswalds · 09-07-2021, 10:51 AM

Looks to be a coating, paint possibly.
Chiappa's being a entry level 1911 it could be the coating. I will see if it will polish up and try inserting the old Kimber pin.

Sanders · 09-11-2021, 01:52 PM

Were you able to make it work without modifying the frame?

Driswalds · 09-11-2021, 08:51 PM

To dam busy to circle back to it. Looking at the kimber pin its dam close in size.
Hopefully next weekend I can give it another try.

ColonelKorn · 09-14-2021, 08:33 PM

It's most likely the coating.

Driswalds · 10-13-2021, 12:16 PM

Just got back to this.
I left the ambi safety on the Kimber and ordered another.
The new sear pin was tight but that one did wiggle in without any polishing.

Thanks for the help.

dinkydow · 11-23-2022, 06:36 AM

Semi auto firearms DO NOT CONTAIN a "sear."

SEAR.... Is a machine gun term. Period.

Semi auto firearms contain a "disconnect." Never a sear. Unless there is an NFA registered sear installed.

09-07-2021, 10:02 AM	#1
Driswalds Member Join Date: Mar 2006 Location: Its Cold outside Posts: 889	1911 sear pin question I ordered a Kimber ambi safety that I intended to install on a Chiappa 1911. It comes with a new sear pin to hold the right hand side on. The pin was to large to fit in the frame. I did install it on a Kimber I had with no issue. Is it just a tight fit and I need to ream the frame on the Chiappa? And what size reamer would I need?

09-07-2021, 10:21 AM	#2
Sanders Moderator Join Date: Mar 2006 Posts: 66,513	What kind of finish is on the Chiappa? Could it just be parkerizing or coating in the hole making it tight? I’d look at polishing the hole before reaming the frame. __________________ "The truly dangerous man dresses inconspicuously and is soft- spoken. He walks away from most confrontations. The only time you learn that the truly dangerous man is mad at you is a split second before you die, for he never fights. He only kills. The truly dangerous man knows that fighting is what children do and killing is what men do." - Charley Reese 1986 3

09-14-2021, 08:33 PM	#6
ColonelKorn High Priest of Honkydom Join Date: Feb 2014 Location: Cheetahstan Posts: 9,546	It's most likely the coating. __________________ I am an enraged asswipe

11-23-2022, 06:36 AM	#8
dinkydow Moderator Join Date: Mar 2006 Location: The Great White North Posts: 96,492	Semi auto firearms DO NOT CONTAIN a "sear." SEAR.... Is a machine gun term. Period. Semi auto firearms contain a "disconnect." Never a sear. Unless there is an NFA registered sear installed. __________________ Our forefathers would have already been shooting...by now. "Let your plans be dark and as impenetrable as night, and when you move, fall like a thunderbolt." "Violence of action means the unrestricted use of speed,strength, surprise and aggression to achieve total dominance against your enemy...any fighting technique is useless unless you totally commit to violence of action." Burning huts in commy vills worldwide since 1968

09-07-2021, 10:51 AM	#3
Driswalds Member Join Date: Mar 2006 Location: Its Cold outside Posts: 889	Looks to be a coating, paint possibly. Chiappa's being a entry level 1911 it could be the coating. I will see if it will polish up and try inserting the old Kimber pin.

09-11-2021, 01:52 PM	#4
Sanders Moderator Join Date: Mar 2006 Posts: 66,513	Were you able to make it work without modifying the frame?

09-11-2021, 08:51 PM	#5
Driswalds Member Join Date: Mar 2006 Location: Its Cold outside Posts: 889	To dam busy to circle back to it. Looking at the kimber pin its dam close in size. Hopefully next weekend I can give it another try.

10-13-2021, 12:16 PM	#7
Driswalds Member Join Date: Mar 2006 Location: Its Cold outside Posts: 889	Just got back to this. I left the ambi safety on the Kimber and ordered another. The new sear pin was tight but that one did wiggle in without any polishing. Thanks for the help.