AR 80% receiver question - Pirate4x4.Com : 4x4 and Off-Road Forum

Aggro · 10-25-2008, 07:51 PM

What size hole, how many threads/inch for the buffer tube?

Scott@Rockstomper · 10-25-2008, 08:15 PM

1-3/16 16tpi.
Drill/ream to 1-1/8" prior to tapping it.

Aggro · 10-25-2008, 08:21 PM

Quote:

Originally Posted by Scott@Rockstomper

1-3/16 16tpi.
Drill/ream to 1-1/8" prior to tapping it.

...goes to sit down with a grainger catalog...

Thanks Scott

Scott@Rockstomper · 10-25-2008, 08:33 PM

Skip Grainger on this one, hit Travers or MSC.
Travers page 141 (they have taper, plug, or bottoming, your choice, ~$62 each) or MSC at $90-some on up.
http://www.travers.com
http://www.mscindustrial.com

There's a lot of cool machining info and suggestions on http://www.cncguns.com

I also found that I was hurting for vertical space, so I couldn't use a full length drill bit or reamer--I found a 3-flute aircraft countersink at 1-1/8" diameter instead that did a very nice clean job of drilling that hole, and it's a very short tool.

Napoleon047 · 10-25-2008, 09:25 PM

http://www.midwayusa.com/eproductpag...eitemid=799763

10-25-2008, 07:51 PM	#1 (permalink)
Aggro Zeus of the Sluice Join Date: Dec 2000 Member # 2587 Location: 3845.859N 12034.534W (N. Ca) Future location of beachfront property. Posts: 4,011	AR 80% receiver question What size hole, how many threads/inch for the buffer tube?

10-25-2008, 08:33 PM	#4 (permalink)
Scott@Rockstomper Smores! Join Date: Oct 2000 Member # 1889 Location: Firestone, Colorado, USA Posts: 6,547	Skip Grainger on this one, hit Travers or MSC. Travers page 141 (they have taper, plug, or bottoming, your choice, ~$62 each) or MSC at $90-some on up. http://www.travers.com http://www.mscindustrial.com There's a lot of cool machining info and suggestions on http://www.cncguns.com I also found that I was hurting for vertical space, so I couldn't use a full length drill bit or reamer--I found a 3-flute aircraft countersink at 1-1/8" diameter instead that did a very nice clean job of drilling that hole, and it's a very short tool. Last edited by Scott@Rockstomper; 10-25-2008 at 08:35 PM.

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10-25-2008, 08:15 PM	#2 (permalink)
Scott@Rockstomper Smores! Join Date: Oct 2000 Member # 1889 Location: Firestone, Colorado, USA Posts: 6,547	1-3/16 16tpi. Drill/ream to 1-1/8" prior to tapping it.

10-25-2008, 09:25 PM	#5 (permalink)
Napoleon047 Registered User Join Date: Oct 2003 Member # 23596 Location: Columbia, MO Posts: 857	http://www.midwayusa.com/eproductpag...eitemid=799763