Starline Brass STAR300BLKEU 300 Blackout Rifle Brass 100 Per Bag

$ 17.50 · 4.8 (781) · In stock

The .300 Blackout is based off of a shortened 5.56x45mm case that is necked to .30 caliber. For AR-15 platform rifles and pistols it only requires changing the barrel to go from 5.56 to .300 Blackout. The Blackout
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