5.7x28mm Ammo Prices & Cost Per Round
Real-time price tracking across 2 retailers. Updated every 2 hours.
Track 5.7x28mm ammo cost per round in real time across 2 retailers. We're monitoring 2 5.7x28mm products (2 priced offers with CPR data) with box prices starting at $28.97. Prices are updated every 2 hours. Click any product to see its full price history and set a price drop alert.
5.7x28mm Cost Per Round History
5.7x28mm Price by Month
| Month | Median CPR | Lowest CPR | Change |
|---|---|---|---|
| September 2026 | 99.8¢/rd | 31.3¢/rd | — |
| August 2026 | 99.8¢/rd | 36.6¢/rd | -0.1% |
| July 2026 | 99.9¢/rd | 18.0¢/rd | -1.0% |
| June 2026 | 100.9¢/rd | 18.0¢/rd | -3.0% |
| May 2026 | 104.0¢/rd | 18.0¢/rd | +1.0% |
| April 2026 | 103.0¢/rd | 40.0¢/rd | — |
Median and lowest observed cost per round per calendar month, from in-stock listings tracked across supported retailers.
Want the whole market instead of one caliber? The Ammo Price Index chains these monthly medians across a fixed 12-caliber basket into a single month-over-month benchmark.
Frequently Asked Questions
Where can I find the cheapest 5.7x28mm ammo?
Based on our real-time tracking across 2 retailers, the cheapest 5.7x28mm ammo starting at $28.97/box. We compare prices from E-Commerce Arms, Palmetto State Armory and more.
