Matador Arms Releases the Montgo-9

(August 25, 2021 – USA)…Matador Arms is releasing the Montgo-9: a monolithic blowback-operated billet 9mm upper receiver that does not require a buffer. Manufactured in the USA, the Montgo-9 is compatible with any AR-15 and/or AR-9 lower, providing shooters with endless build possibilities, while being compact and versatile.

The current version of the Montgo-9 is the “K” version, featuring a 5.5” barrel threaded to 1/2×28”. The back cap shows that no buffer is required, allowing for many compact options. The non-reciprocating charging handle
is reversible. The Montgo-9 has a full length integral picatinny rail on top, and a 3.5” bottom accessory rail.

The Montgo-9 upper receiver is made of aluminum, and the bolt and trunnion are 4140 steel for durability. Weight is 3.5lbs with an OAL of 12.125” and a 1.47” width.

The Montgo-9 adds to Matador’s 9mm product offering. Matador just recently announced their AR-9 80% billet lower receivers, the first run of which are shipping mid-September. Matador already manufactures the Mag-X, a mag block adapter enabling the use of P320, Glock, M&P, and CZ-75 pistol mags in their AR-15 lowers. Matador’s Sidewinder is a folding buffer tube adapter that will fold up anything with AR buffer tubes threads WITHOUT a moving buffer inside. And, the adjustable Regulator muzzle brake comes in 9mm which could top off the Montgo-9 perfectly.

The Montgo-9 will be on display at this year’s NRA show in Houston, at booth #4809.

Shipping of the Montgo-9 is projected for Q4 of this year. The MSRP of the Montgo-9 is $549.99.

For more information on the Montgo-9, visit or email

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