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The caliber designation on this is .308, but the platform designation is AR-15. would this work for 5.56NATO? — 9 Answers

by Jeremey, from TX, United States Asked on May 5, 2020

Name Aero Precision M5E1 .308 Enhanced Upper Receiver (4.6)
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A
Answered by Aero Precision USA, Manufacturer from WA, United States, on May 19, 2021

It will not. The M5 is an AR308 pattern rifle. For a 5.56NATO build you should look at the M4E1 Enhanced upper receiver.

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Answered by Burke Headrick, member, from NM, United States, on January 03, 2021

No.
.308/7.62×51NATO
Platform designation should be AR-10 or LR-308.

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Answered by Admiral Stiffplank, member, from TX, United States, on April 09, 2021

No. The upper and lower receivers on 308 rifles are larger than the 5.56.

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Answered by jvcjbl, guest, from TX, United States, on March 19, 2021

No. You need to purchase the M4E1 which is designed for the bolt carrier group that chambers 5.56 NATO or .223 Remington

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Answered by John, member, from LA, United States, on March 01, 2021

No, this if for .308 based cartridges only, 6.5 Creedmoor, .243, 7-08, etc. You want the M4 version for .223/5.56, 6.5 Grendel, 6 ARC, etc.

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Answered by Daniel Mendez, member, from PA, United States, on January 11, 2021

No.. it’s a 308 lower And upper receiver 7.62.51

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Answered by Bink, member, from CA, United States, on January 08, 2021

No the 308 is bigger quite a bit brother

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Answered by Toby, member, from OK, United States, on January 06, 2021

Not without major modification. This reciever is made to accept big bore bcgs like aero precision's .308 bcg. The reciever is physically larger than a standard ar-15 receiver. The M5 aero precision parts are all made for .308 or similar cartridges.

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Answered by Sandstorm, member, from CT, United States, on January 04, 2021

No, this is not compatible with an AR15. This is for 7.62 x 51mm / .308 rounds and the platform is an LR10.

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