Using a trigger guard pin to pin a lo-pro gas block

Got a used BA barrel and BA lo-pro gas block and need to get a pin, to pin it to the barrel.

Read that the BA gb uses a 1/8” roll pin that is the same size as the trigger guard roll pin.

Before I try to find my spare trigger guard pin to check if it will fit, I tried to google if anyone used a trigger guard pin for their gb. My Google Fu came up with nothing.

Is a roll pin for the trigger guard okay for use with a gb? Or is a gb pin different to better handle the heat/temp?

If different, I’ll order a pin from BA.

(I could call BA but based on one person’s experience with BA, Ill get the correct answer here)

Tnx in advance!

As long as you ream the hole to wear the pin stays, It'll be fine. I have some Adco abomination that has a role pin holding the block, and It's been fine.

probably will not work. There are two types of pins often called roll pins - one is a c-spring pin like on the trigger guard, the other type is a coil spring (similar to a Geissele Super Gas block).
Gas blocks from what I've seen are held in place by a coil spring. Size-wise it might work. It might even hold for a long time. But I don't think that would be 100% reliable for this purpose.

I think you're right. I've seen the Geissele coil spring. I think my Adco just has a plain roll pin.

I read about coil pins and taper pins....was wondering about that. The guy that mentioned a roll pin might have been using a coil pin but used the wrong terminology.

I’ll try to see if the tg pin fits out of curiosity and double check with BA

The barrel is for a range toy - not home use - so it doesn’t have to be 100% but it would really suck if my toy went down at the range. I’m neutered and only get 1 pass each month

Tnx!

You could always just do it right and pick up a BRT Gas Block Pin Kit - Coil Pin

https://dqzrr9k4bjpzk.cloudfront.net.../294749816.jpg

Taper pins are solid pins used for FSB installation:
Use this: https://www.bravocompanyusa.com/BCM-...%20fsb%202.htm
To install this: https://www.bravocompanyusa.com/AR15...base-f-750.htm
(need a reamer as well to install taper pins)

I can't recall where or what manufacturer, but I have seen a picture online of a solid pin (one, not two) being used for a low profile gas block as well.

Quote:

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Originally Posted by tim808

Got a used BA barrel and BA lo-pro gas block and need to get a pin, to pin it to the barrel.

Read that the BA gb uses a 1/8” roll pin that is the same size as the trigger guard roll pin.

Before I try to find my spare trigger guard pin to check if it will fit, I tried to google if anyone used a trigger guard pin for their gb. My Google Fu came up with nothing.

Is a roll pin for the trigger guard okay for use with a gb? Or is a gb pin different to better handle the heat/temp?

If different, I’ll order a pin from BA.

(I could call BA but based on one person’s experience with BA, Ill get the correct answer here)

Tnx in advance!

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I think either would work. A slotted roll pin is not the wrong pin for the application, though.

The slotted spring/roll pin is best for situations with a static load, the coiled spring/roll pin is best for situations with a dynamic load. https://www.spirol.com/library/white...embly_Life.pdf

The gas block application would be more of a static load.

26 inf - Tnx for the info the different types of pins!

I agree the roll pin will work but I noticed that the gas block makers include a coil pin...so I’ll go with a coil for peace of mind....and to support BRT :-)