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The EPC-9/40 threaded upper includes a pre-installed Last Round Bolt Hold Open assembly; forged 7075-T6 aluminum; compatible with most AR-15 barrel nuts and handguards; features a dimple above threads for handguard timing; standard takedown/pivot pin lug pattern; laser-engraved T-marks.
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Sign In to Set AlertThis is a bundled product that includes multiple components. The exact contents may vary - check the product description for more details.
• Complete assembly ready to use
• Multiple components included
• Value package pricing
Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
A neutral guide to component strategies for left-handed shooters, left-eye dominant right-handed shooters, and those managing eye/hand dominance mismatches. Covers ambi uppers, charging handles, gas system tuning, and real-world tradeoffs.
6 min read