https://www.airsoftmegastore.com/18207-lancer-tactical-lt-11b-hi-cap-500-round-airsoft-magazine-black-LT-11B+MAG
Lancer Tactical LT-11B AK 500rd HI-Cap Airsoft Magazine - BLACK | Airsoft Megastore
Capable to hold 500 rounds, the LT-11B AK74 Magazine is made with a metal frame and it functions with a wind up wheel display on the bottom.
lancer tactical
https://www.mainegundealer.com/product-page/remington-thunderbolt-22lr-40gr-round-nose-ammo-500rd
Remington Thunderbolt 22lr 40gr Round Nose Ammo 500rd 21241 | Allsport Performance / Maine Gun...
Remington Thunderbolt 22lr 40gr Round Nose Ammo 500rd for sale at Allsport Performance Inc Hermon, Maine Near Bangor