
In Stock
ProMag Magazine FN Five-seveN 5.7x28mm FN 21-Round Steel Blue
Sold byMidwayUSA•Posted Apr 27, 2026
Compare prices for ProMag Magazine FN Five-seveN 5.7x28mm FN 21-Round Steel Blue$25.99
Price and stock data refresh continuously from MidwayUSA.
Deal Summary
- Currently in stock.
- Caliber: 5.7x28
- Category: parts
- UPC: 708279016127
- SKU: 887757
- Brand: Promag
Price History
Deal Details
ProMag magazine bodies are constructed of high carbon heat-treated steel and TIG-welded for strength. The springs are precision wound using heat-treated chrome silicon wire. Bases and followers are injection molded from polymers selected for their durability. The result is quality, consistency, durability and reliability.
Other Offers for This Product
Active offers from your catalog for ProMag Magazine FN Five-seveN 5.7x28mm FN 21-Round Steel Blue.
Comparing 5 retailers carrying this product
Lowest Price: $19.49
Highest Price: $26.99
You Save: $7.50
Avg Discount: 16% off

PROMAG FN FV SVN 5.7X28MM 21RD BL ST
PromagBattleHawk ArmorySKU/UPC: 708279016127
$19.49$34.99Save 44%
View at BattleHawk Armory
ProMag Mag, 5.7X28MM, 21 Rounds, Fits FN Five-seveN USG 5.7x28mm pistol, Steel Construction, Blued Finish, Black FNH-A10
PromagHinterland OutfittersSKU/UPC: 218188
$21.15
View at Hinterland Outfitters
Pro Mag Industries FN Five-seveN USG Magazine 5.7 X 28 21-Rounds
Pro Mag IndustriesGrabAGunSKU/UPC: GAG_MGPMFNHA10
$22.69$34.99Save 35%
View at GrabAGun
ProMag Magazine FN Five-seveN 5.7x28mm FN 21-Round Steel Blue
PromagMidwayUSASKU/UPC: 887757
$25.99
View at MidwayUSAProMag FN FiveseveN Magazine 5.7x28mm 10rd Steel
PromagAmmunition DepotSKU/UPC: FNHA10
$26.99
View at Ammunition Depot