4.5 stars on 202 reviews
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Josh Z. 146 days ago
Verified Purchase
300 Blackout Upper
Great Upper receiver so far. I put 50 rounds through it without an issue.

The fit was a little off with my Rock River lower. Took a bit to get it aligned with the help of a rubber mallet.

Overall I am very happy with the 300 Blackout upper from APOC Armory.