Ergo M4 Receiver Castle Nut, Black

Gun Parts Ergo UPC 874748005333 MPN 4971-(B)

Ergo M4 Receiver Castle Nut, Black
$9.29

at E-Commerce Arms · checked 10 minutes ago

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6 retailers · $9.29 to $9.99 in stock

This listing: Palmetto State Armory $9.99

Offers

AR-15/M16 M4 RECEIVER CASTLE NUT
E-Commerce Arms In Stock Checked 10 minutes ago Condition: New
$9.29 + shipping in cart
History
Ergo M4 Receiver Castle Nut, Black
Palmetto State Armory In Stock Checked 5 days ago SKU 51655210244
$9.99 + shipping in cart
History
ERGO CASTLE NUT
BattleHawk Armory Out of Stock Checked 4 hours ago
$5.75 + shipping in cart
History
Ergo Grips Ar-15 Receiver Extension Castle Nut - Ar-15/M16 M4 Receiver Castle Nut
Brownells Out of Stock Checked 7 days ago
$9.29 + shipping in cart
History
Ergo Castle Nut for AR-15
GrabAGun Out of Stock Checked 4 days ago
$9.29 + shipping in cart
History
Ergo Grips AR-15/M16 M4 Receiver Extension Castle Nut
Ammunition Depot Out of Stock Checked 3 hours ago
$12.99 + shipping in cart
History

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

Price history

Lowest price across retailers each day.

Lowest seen
$5.75
Typical price
$7.99
Tracked since
Apr 9, 2026

Today's best price is $3.54 above the 213-day low and 16% above typical.

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