Expo Arms Mil-Spec Steel Castle Nut
Expo Arms
Overview
The Expo Arms Mil-Spec Steel Castle Nut is a castle nut. Compare prices from multiple merchants and find the best deal.
Specifications
MPNXP-CN
MaterialSteel
TypeCastle Nut
ColorBlack
Available Merchants(1)
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Price and stock
Availability is good for the Expo Arms Mil-Spec Steel Castle Nut: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $3.95, so there haven't been real sales lately. Buying today, the lowest price is $3.95 at Primary Arms, which matches the best price we saw in September.
Prices checked · refreshed daily across 37 retailers
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