Anybody know where I can obtain a tap & die that matches my AR-15.
Standard kits at Sears and such only have 1/2" x 20 NF.
Ye,s I have a metal lathe, still want a T&D set for this.
Most tool distributors do not carry gunsmith pitches in taps and dies. Brownells and Midway have the taps and dies, or you can try Pacific Tool and Gauge.
If anyone else wants a source, MSC usually has everything listed in Machinery's Handbook and then some. Their special purpose hand taps page includes 1/2" taps with thread pitches of 11, 12, 14, 16, 18, 24, 27, 30, 32, 36, 40, 48, 56 tpi. The standard threads are on their regular tap pages.