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Will this trigger for in an aero m4e1 lower? I’ve had problems with the a timney trigger not fitting bra use the m4e1 is not milspec. — 5 Answers

by Andrew Mendoza, from TX, United States Asked on August 25, 2021

Name OpticsPlanet Exclusive RISE Armament RA-535 Advanced-Performance Trigger (4.7)
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Answered by Patrick, Gear Expert, from IL, United States, on September 01, 2021

This is meant for the Mil-Spec lower receiver.

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Answered by Larry, member, from ID, United States, on November 28, 2021

I have one installed in an Aero M4E1 and it fits perfectly and works great.

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Answered by ssullivan, member, from MA, United States, on June 03, 2022

Ofcourse it works in an M4E1 lower. The M4E1 IS milspec in all dimensions. Whomever said it wasn't is just wrong.

It has 5 enhanced features (such as the flared magwell, set screw, etc) but none of those impact the dimensions or interchangeability with AR parts.

It sounds like you got a busted Timney trigger. I have too, but don't blame the M4E1.

An M5E1 lower is not milspec, but that is because no AR10 lower is.

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Answered by Jared Reinhart, member, from NY, United States, on January 16, 2022

I have an aero M4e1 and it fits and functions perfectly. Rest assured friend.

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Answered by allcattle0hat, member, from PA, United States, on December 28, 2021

I have this combination and they are a perfect fit!

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