This MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slug Ammunition is high brass.
If the Breecher Choke is a 12 gauge cylinder bore choke than it can be used with the MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slug Ammunition.
I recommend using a cylinder bore choke with the MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slug Ammunition.
The MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slug Ammunition can be used in that 12 gauge shotgun as long as you have the correct choke tube installed in the gun.
These MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slugs can be fired from the Typhoon X12. Just ensure you have a compatible choke installed in the gun before firing.
Whether the MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slug Shotgun Slug Ammunition can be shot through an AR style Shotgun will depend on the specifics of the shotgun. If you have a 12 gauge AR shotgun with a smooth bore barrel and cylinder choke then it will be fine to shoot. I recommend emailing us at techsales@opticsplanet.com so we can get more information regarding your specific shotgun to determine if this ammo can be used with it.
You should only shoot slugs out of a shotgun with a cylinder choke or an improved cylinder choke unless otherwise specified by the manufacturer including these MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slugs.
The MILI Ammo 12 Gauge 1 oz 2.75" Rifled Slugs do contain lead.