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No m4 feed ramps, tight barrel opening - Rainier Arms AR-15 Gen 2 Forged A4 Upper Receiver

by SteveTFC, Verified Owner from NM, United States Written on July 6, 2026
Review for Rainier Arms AR-15 Gen 2 Forged A4 Upper Receiver
Rainier Arms AR-15 Gen 2 Forged A4 Upper Receiver
Rainier Arms AR-15 Gen 2 Forged A4 Upper Receiver
$146.49 $130.00 Save 11%
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SteveTFC's Review of Rainier Arms AR-15 Gen 2 Forged A4 Upper Receiver

This receiver has no M4 feed ramps cut into it. The three AR-15 barrels I have tried require a lot of force to insert in it. Perhaps some people want an old fashioned receiver. Perhaps this receiver is supposed to be heated to accept a barrel.
Would Recommend: No
Was it helpful to you? Yes | No
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Last updated 2026-07-07 UTC.