Ar15 missing pin

Linker · January 19, 2021, 11:15 PM

Have a pin missing on ar15. Location is trigger guard.
Right below and behind the trigger. Anyone know what it is called. Want to replace it.

FrankenMauser · January 20, 2021, 02:49 AM

Trigger guard roll pin.

Ed4032 · January 20, 2021, 07:04 AM

I found one of those roll pins once. I had to build an entire AR so it would not be wasted. Terrible thing to waste.

stagpanther · January 20, 2021, 09:10 AM

Be sure to have even solid support for the receiver trigger guard fitting when you drive that pin in. Some manufacturers use a spring-loaded pin that does not require driving a roll pin, if your receiver trigger guard has a hole on only one side it is probably that style.

HiBC · January 20, 2021, 10:24 AM

Do not drive the roll pin into ANY hole that is not a through hole, Not ever!!
Driving a roll pin into a blind hole.....???? Now how do you get it out?
OK. I'm talking about the holes in the lower receiver here.The front hole behind the mag well is not a through hole. We do not put a roll pin in that one.It gets a spring loaded plunger. It has to do with opening the trigger guard for winter .
Only the rear through hole gets a roll pin. If you messed up and drove the roll pin in the blind hole,don't get all excited,and don't get ut a bigger hammer or start drillng holes!! Ask me and I'll tell you how to fix it without harming your lower.
Back to your question. Its not convenient for me to measure at the moment.
But I can tell you its metric. And I can tell you a millimeter is approx .0394 inch. For now,we can call it .040. I think its a 3 mm dia roll pin. Length? Measure the width of the receiver at the hole.If you measure it in thousandths
(inch)with a caliper,divide that by .0394. You might get a number about 18mm
An 18 mm length pin ought to be about .709 long.
A touch shorter is good.
Measure to confirm . Your local hardware store might have a stainless one that size.
If you have to order it from Midway or Brownells or or ???,I suggest you get a kit of the little springs and pins that go flying. Might cost you $10 But when you lose an extractor plunger and spring or a hinge pin detent plunger and spring,you will be glad you have the spares.

FrankenMauser · January 20, 2021, 11:26 AM

Drink too much coffee this morning, HiBC?

His post is not long.
In the middle, you'll find:

Quote:

Right below and behind the trigger.

HiBC · January 20, 2021, 12:22 PM

Quote:

Drink too much coffee this morning, HiBC?

His post is not long.
In the middle, you'll find:

There are the folks who start threads,often with a question.
There are folks who in good faith,attempt to answer that question.

And then there is the third kind. They resemble flies,both in their choice of diet and the way they can be annoying.

The sort of person who has nothing to bring to the table,but complains about the food.
ARs are the topic. Roll pins are the topic. Building ARs is the topic.
I am not the topic, neither is my coffee.

I suggest that you and the horse you rode in on go work on developing a deeper,more meaningful relationship.

And as a gesture of hospitality,I offer you my undergarment to snack on during your journey.

**44 AMP** · January 20, 2021, 02:16 PM

Question asked and answered, We're done here, before anyone else (myself included) has "too much coffee".

closed.

January 19, 2021, 11:15 PM	#1
Linker Member Join Date: January 8, 2021 Location: Texas Posts: 52	Ar15 missing pin Have a pin missing on ar15. Location is trigger guard. Right below and behind the trigger. Anyone know what it is called. Want to replace it.

January 20, 2021, 02:49 AM	#2
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,424	Trigger guard roll pin. __________________ Don't even try it. It's even worse than the internet would lead you to believe.

January 20, 2021, 07:04 AM	#3
Ed4032 Senior Member Join Date: January 13, 2010 Location: Texas Posts: 306	I found one of those roll pins once. I had to build an entire AR so it would not be wasted. Terrible thing to waste. __________________ Gun control is like stopping drunk driving by making it harder for sober people to drive.

January 20, 2021, 09:10 AM	#4
stagpanther Senior Member Join Date: March 2, 2014 Posts: 11,787	Be sure to have even solid support for the receiver trigger guard fitting when you drive that pin in. Some manufacturers use a spring-loaded pin that does not require driving a roll pin, if your receiver trigger guard has a hole on only one side it is probably that style. __________________ "Everyone speaks gun."--Robert O'Neill *I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!*

January 20, 2021, 02:16 PM	#8
44 AMP Staff Join Date: March 11, 2006 Location: Upper US Posts: 28,833	Question asked and answered, We're done here, before anyone else (myself included) has "too much coffee". closed. __________________ All else being equal (and it almost never is) bigger bullets tend to work better.

January 20, 2021, 10:24 AM	#5
HiBC Senior Member Join Date: November 13, 2006 Posts: 8,286	Do not drive the roll pin into ANY hole that is not a through hole, Not ever!! Driving a roll pin into a blind hole.....???? Now how do you get it out? OK. I'm talking about the holes in the lower receiver here.The front hole behind the mag well is not a through hole. We do not put a roll pin in that one.It gets a spring loaded plunger. It has to do with opening the trigger guard for winter . Only the rear through hole gets a roll pin. If you messed up and drove the roll pin in the blind hole,don't get all excited,and don't get ut a bigger hammer or start drillng holes!! Ask me and I'll tell you how to fix it without harming your lower. Back to your question. Its not convenient for me to measure at the moment. But I can tell you its metric. And I can tell you a millimeter is approx .0394 inch. For now,we can call it .040. I think its a 3 mm dia roll pin. Length? Measure the width of the receiver at the hole.If you measure it in thousandths (inch)with a caliper,divide that by .0394. You might get a number about 18mm An 18 mm length pin ought to be about .709 long. A touch shorter is good. Measure to confirm . Your local hardware store might have a stainless one that size. If you have to order it from Midway or Brownells or or ???,I suggest you get a kit of the little springs and pins that go flying. Might cost you $10 But when you lose an extractor plunger and spring or a hinge pin detent plunger and spring,you will be glad you have the spares.