Boston Police several high powered weapons and over a thousand rounds of ammunition from a Roslindale neighborhood on Thursday.
Among the items seized were AK-47 and AR-15 assault rifles, a Tec-9 machine pistol, and a magnum "super Blackhawk" revolver.
Investigators also reportedly found grenade-style projectiles designed for a grenade launcher.
Armor-piercing bullets were among the more than 1,000 live rounds of ammunition also recovered.
Police did not release any information regarding any arrests related to the weapons cache.
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