Match My Mod
ARRMA Big Rock 3S V3
ARRMA · AR330540 / ARA330540
OEM replacement
ARA4312V3 exploded view specifies AR330540; V3 retailer listing pairs it with Big Rock V3. Source also lists: Typhon 3S.
Important note
Wide-arm geometry; not Granite/Senton.
Confidence: High
Verified Sep 28, 2026
Price not captured
Price and availability may have changed.
RPM · RPM80842
Durability upgrade
Replaces OEM ARA330540
RPM replaces ARA330540 and cautions Big Rock owners to verify the installed arm. Source also lists: Typhon 3S.
Important note
Older Big Rock variants may use Granite arms. Supporting parts: Verify installed OEM arm number.
Confidence: High
Verified Sep 28, 2026
Last seen: $12.49
Price and availability may have changed.
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