New Brownells BRN-180SH Upper Optimized for Suppressor Use


    The BRN-180SH!

    If you want to shoot some suppressed 300 AAC Blackout rounds downrange and have $999 laying around, there’s a new upper receiver waiting for you at Brownells. The BRN-180SH is a 10″ upper receiver, optimized to be used with suppressors, and will fit any standard AR-15 or BRN-180 lower.

    Brownells @ TFB:

    The BRN-180SH upper has a gas-shutoff setting, to minimize the noise. To reload you can use the adjustable charging handle, pull it back and release for another cycle.

    The dangerous end has a 5/8-24 muzzle thread adapter, for your suppressor. The upper ships with a classic A2 flash hider, which caps the 10.5” nitride barrel with a 1-8 twist.

    Here is the new product announcement in full:

    Brownells New BRN-180SH Upper Optimized for Suppressor Use

    GRINNELL, Iowa – Brownells unveiled the BRN-180SH complete upper – the newest addition to the popular BRN-180 line – announcing it at the IWA Outdoor Classics show in Nuremberg, Germany.

    Chambered in 300 Blackout, the BRN-180SH has 10.5” barrel with 5/8-24 muzzle threads, and a gas system with three settings –unsuppressed, suppressed, and off.

    The BRN-180SH retails for $999.

    With the gas system turned completely off, the upper is converted into “single shot” mode, virtually eliminating sound produced by gases escaping through the ejection port or by the bolt carrier group cycling.

    When fired with a suppressor attached and the gas system turned off, the BRN-180SH in single-shot is even more quiet than a BRN-180S.

    The BRN-180SH comes with an adjustable charging handle that can be turned downward to help transform the upper into a straight-pull action, allowing for fast follow-up shots when set for the quietest possible operation.

    The upper can be quickly converted back to unsuppressed shooting with a simple twist of the gas adjustment and by turning the charging handle back to its upward position.

    Like the rest of the BRN-180 line of uppers, the BRN-180SH fits onto any standard AR-15 or BRN-180 lower, and requires no buffer tube assembly. It readily operates with a folding stock, or no stock at all.

    To see the new BRN-180SH, and the rest of the BRN-180 line of uppers, lowers and parts, visit

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    Eric B

    Ex-Arctic Ranger. Competitive practical shooter and hunter with a European focus. Always ready to increase my collection of modern semi-automatics, optics, thermals and suppressors. TCCC Certified. Occasionaly seen in a 6×6 Bug Out Vehicle, always with a big smile.