Rock River Arms A4 SS 16" Classic Upper .450 Bushmaster 1:24 M-LOK Mid-Length with BCG and CH, Black - 450B0461

Name: Rock River Arms A4 SS 16" Classic Upper .450 Bushmaster 1:24 M-LOK Mid-Length with BCG and CH, Black - 450B0461
Brand: Rock River Arms
SKU: 51655170444

Upper Rock River Arms UPC 842834124138 MPN 450B0461

$619.40

at E-Commerce Arms · checked 1 hour ago

$631.35 shipped · $11.95 shipping

8 retailers · $631.35 to $751.99 shipped

This listing: Palmetto State Armory $768.99

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Shipping estimate for one item to the lower 48 from the retailer's published policy or feed; the retailer's cart is final.

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Lowest price across retailers each day.

Lowest seen: $591.99
Typical price: $619.40
Tracked since: Apr 10, 2026

Today's best price is $27.41 above the 217-day low and about typical.

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