ProMag 20rds 9mm Black Magazine - Premium - SIG-A21
- UPC
- 708279015908
- MPN
- SIGA21
- SKU
- 51655171786
- Manufacturer
- ProMag
$22.69
$23.99
Best offer
E-Commerce Arms $16.64
Cheaper Offer Available
E-Commerce Arms lists a matched offer at $16.64, $6.05 (27%) less than this listing's $22.69.
Price Intelligence
High confidence
Against lowest
Matches lowest seen
Typical price
4% below typical
From tracked high
$1.30 lower (5%)
Data depth
167 days, 2 price changes
Enough history to judge this against real observed movement.
Tracked for 167 days. Last price change: 2026-09-19. Recorded 2 price changes. The average price is $23.42. The price has ranged from $22.69 to $23.99. The current price of $22.69 is -3% below average.
Lowest
$22.69
Highest
$23.99
Average
$23.42
Tracked
167 days
Price Changes
2
Last price change
2026-09-18
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Live Offers
3 retailers list PRO MAG SIG P365/XL 9MM 20RD; 3 in stock, in-stock prices run $16.64 to $23.99.
Best Price History Across Offers
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Insights
Price Dropping
Price has decreased over the last 3 days — from $23.99 to $22.69.
Recent Price Drop
Dropped $0.90 (3.8%) since 2026-08-06.