Would it be possible to create a firearm capable of firing 2 different calibre bullets from the same barrel? Example 5.56 and a 7.62, could the smaller cartridge be cased similar to
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5.6X44MM XM 216 GREEN SABOT FLECHETTE RA 65 – CollectibleAmmunition.com – Your source for Collectible Ammunition
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Future Firearms Ammunition Technology 003: Sabots – Performance-Enhancing Shoes for Your Bullets -The Firearm Blog
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20X112MM WHITE SABOT TITANIUM FLECHETTE NO HEADSTAMP – CollectibleAmmunition.com – Your source for Collectible Ammunition
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Soviet fin stabilised discarding sabot rife caliber ammo - General Ammunition Collector Discussion - International Ammunition Association Web Forum
![Lot 30 – Aerojet factory display on wood base, “Multiple Flechette Cartridge with puller sabot and aluminum case, etc.” 25° section of cartridge. Ex-Woodin collection. $165-210 – Woodin Lab Lot 30 – Aerojet factory display on wood base, “Multiple Flechette Cartridge with puller sabot and aluminum case, etc.” 25° section of cartridge. Ex-Woodin collection. $165-210 – Woodin Lab](https://woodinlab.com/wp-content/uploads/2022/03/Lot-30.jpg)
Lot 30 – Aerojet factory display on wood base, “Multiple Flechette Cartridge with puller sabot and aluminum case, etc.” 25° section of cartridge. Ex-Woodin collection. $165-210 – Woodin Lab
![5.56 FLECHETTE WHITE SABOT R-P 222 REM MAG – CollectibleAmmunition.com – Your source for Collectible Ammunition 5.56 FLECHETTE WHITE SABOT R-P 222 REM MAG – CollectibleAmmunition.com – Your source for Collectible Ammunition](https://i0.wp.com/collectibleammunition.com/wp-content/uploads/2020/03/dsc00216-scaled.jpg?fit=2560%2C1920&ssl=1)