Drill size for gas tube retention pin hole?

JoeLad · September 11, 2018, 10:21

I traded for a carbine FAL a couple months back. It was covered in OD green paint. An Imbel kit, on an Imbel upper. While stripping off the paint, I could not remove the gas tube. I wrenched it off, damaging it in the process. I found a replacement tube online, and it would not thread in. Closer inspection revealed a burrr where the retention pin fits.

Anyone know what size drill bit is needed to clear out the hole?

Worst case scenario is I replace the GB.

**gunplumber** · September 11, 2018, 11:42

Pin is .078" 5/64"
I would go a step down to #48 or #49 because I don't want to risk making the hole any bigger than pin.

JoeLad · September 11, 2018, 14:00

Thanks, GP!

September 11, 2018, 10:21	#1
JoeLad Registered FALaholic #: 3353 Join Date: Jun 2001 Location: SE PA Posts: 3,327	Drill size for gas tube retention pin hole? I traded for a carbine FAL a couple months back. It was covered in OD green paint. An Imbel kit, on an Imbel upper. While stripping off the paint, I could not remove the gas tube. I wrenched it off, damaging it in the process. I found a replacement tube online, and it would not thread in. Closer inspection revealed a burrr where the retention pin fits. Anyone know what size drill bit is needed to clear out the hole? Worst case scenario is I replace the GB.

September 11, 2018, 11:42	#2
gunplumber Arrogant Bastard Gold Contributor FALaholic #: 96 Join Date: Jul 2000 Location: Surprise, AZ Posts: 25,101	Pin is .078" 5/64" I would go a step down to #48 or #49 because I don't want to risk making the hole any bigger than pin. __________________ T. Mark Graham, Master Gunsmith Arizona Response Systems, LLC

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

September 11, 2018, 14:00	#3
JoeLad Registered FALaholic #: 3353 Join Date: Jun 2001 Location: SE PA Posts: 3,327	Thanks, GP!