Threading BREN/MPX/MCX Barrels


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This includes cutting/crowning as well as threading.  Threads will be concentric to the bore. Do NOT send the complete rifle. – If you want the barrel shortened note length in the comment section at checkout. When barrels are cut, they are all measured from a closed bolt face as the only standard measurement we use.  Send just the barrel assembly. Do NOT send the barrel attached to the receiver.

There are no custom thread length or crown options.  If you want the barrel shortened note length in the comment section. Be sure of your measurements, and do not send multiple measurements. If you say you want it cut 3″ from the muzzle, we will cut 3″ from the muzzle. If you say you want the barrel threaded at 14″ we measure 14″ from the bolt face. If you say you want it cut at the step by the muzzle for 14.5″ we will cut it at 14.5″ regardless of that relationship to the “step”.

This service is for MPX/MCX Barrels. We don’t work on any other SIG barrels. The shortest barrel we can thread is 5-3/4″.

Additional information

Thread Pitch

1/2×28, 1/2×36, 5/8×24, 1/2×32, 13.5Mx1LH, M16x1 RH

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