In StockSave 11%
ProMag 20rds 9mm Black Magazine - Premium - SIG-A21
Sold byPalmetto State Armory•Posted May 18, 2026
Compare prices for ProMag Magazine for Sig P365 9mm 20-Round Steel Blue$23.99
$26.99
You save $3.00 (11% off)
Price and stock data refresh continuously from Palmetto State Armory.
Deal Summary
- Currently in stock.
- Caliber: 9mm
- Category: parts
- UPC: 708279015908
- SKU: 51655171786
- Brand: Promag
Price History
Deal Details
ProMag magazines integrate a blend of traditional heat-treated high carbon steel stamping and welding, along with modern precision injection molding using Mil-Spec polymer compounds. Specifically engineered for Sig Sauer P365 pistols chambered in 9mm, these magazines are constructed from robust heat-treated steel and feature a durable black oxide finish. Each ProMag magazine is supported by a lifetime guarantee against manufacturer's defects, ensuring reliability and longevity for shooters who d
Other Offers for This Product
Active offers from your catalog for ProMag Magazine for Sig P365 9mm 20-Round Steel Blue.
Comparing 7 retailers carrying this product
Lowest Price: $19.01
Highest Price: $31.99
You Save: $12.98
Avg Discount: 14% off
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ProMag SIGA21 20rd 9mm Fits P365/365XL Steel, Magazine
PromagHinterland OutfittersSKU/UPC: 211174
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Pro Mag Industries Sig P365 Magazine 9mm 20-Rounds for P365 / P365XL
Pro Mag IndustriesGrabAGunSKU/UPC: GAG_SIGA21
$20.99$34.99Save 40%
View at GrabAGunProMag 20rds 9mm Black Magazine - Premium - SIG-A21
PromagPalmetto State ArmorySKU/UPC: 51655171786
$23.99$26.99Save 11%
View at Palmetto State Armory
ProMag Sig Sauer P365 9mm Magazine - 20 Rounds (Steel)
Sig SauerAmmunition DepotSKU/UPC: SIG-A21
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ProMag Magazine for Sig P365 9mm 20-Round Steel Blue
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