Primary Weapons Ar-15 Mk1 Mod 1-M Upper Receiver Assembly 300 Blackout M-Lok - Mk109 Mod 1-M 300blk Upper Receiver W/9.75'''' Bbl

Upper Primary Weapons UPC 811154033451 MPN MK1-M1U-300BLK-9

$1,129.95

at Brownells · checked 1 hour ago

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6 retailers · $1,129.95 to $1,209.95 in stock

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Lowest price across retailers each day.

Lowest seen: $970.41
Typical price: $1,129.95
Tracked since: Jun 25, 2026

Today's best price is $159.54 above the 136-day low and about typical.

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