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What does single ramp mean? Thanks Paul — 1 Answer

by Paul, from WV, United States Asked on November 25, 2017

Name Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box (3.7)
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Answered by Mark H., Gear Expert, from IL, United States, on December 21, 2017

With a .223/5.56, the M4 feed ramp is a modification to the two feed ramps that guide the nose of the bullet and casing into the breech of the chamber. The standard AR rifle type feed ramp is a 45 degree cut into the bottom of the breach of the barrel. The m4 type feed ramp is a shallower 52 degrees that extend down into the bottom of the upper receiver.

This upper has a single, centered feed ramp.

Mark H.

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