Stern Defense SD 16.1in MOD4 MLOK .40SW Upper Receiver Assembly 15in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD15INMD4ML16.1INBR40SWKK

Handguard Stern Defense UPC 850001176736 MPN 015SD15INCHMOD4MLOK161INCHBARREL40SWKK SKU 3JS-URC-SD7-015SD15INMD4ML16-1INBR40SWKK

Stern Defense SD 16.1in MOD4 MLOK .40SW Upper Receiver Assembly 15in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD15INMD4ML16.1INBR40SWKK
$600.00 Out of stock

at Optics Planet

Free shipping over $49

View at Optics Planet →

Restock alert

Firearm Data Lab may earn a commission when you buy through this retailer link. Commissions never change a price or move a cheaper listing below a pricier one. When two retailers tie exactly, the one that pays us a commission is listed first.

Price history

Lowest seen
$600.00
Typical price
$600.00
Tracked since
Oct 29, 2026

The advertised price has held at $600.00 since tracking began on Oct 29, 2026; no price changes recorded.

Embed this chart

A live price-history image, updated as we track new prices. Paste the snippet that matches where you're posting.

Restock alert One email when this is back in stock. Free. No account needed.