Gun Parts : The Marksman

Sig Sauer MCX Upper Receiver, .300 Blackout, 9"

Product Code:UAMCX-9B-300B-TAP
Type:Gun Parts
Sub Type:AR-15 Parts


Currently out of stock

Available for In-Store Pick Up One new Sig Sauer MCX Upper Receiver chambered in .300 Blackout. This receiver has a 9 inch barrel with a 1 in 5&rdquo twist, aluminum M-LOK handguard, gas piston system with an adjustable gas regulator and comes with the MCX stock adapter as well as the folding AR-15 buffer tube adapter to convert your AR-15 lower receiver to use this upper, two stage Sig Sauer Match Duo trigger kit, a 1913 picatinny mounted QD socket, the 90 degree muzzle adapterfor mounting non tapered devices to the barrel, the factory cardboard box and factory paperwork.

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