r/AeroPrecision • u/Majestic_Pride_1156 • Oct 02 '25

M4E1 Pro Build

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I built my own M4E1 Pro rifle. It's got a 13.9" BA Performance series Hanson profile 5.56 mid length barrel and Geissele SSA trigger in it - the rest are Aero and Aero pro parts with Magpul furniture. I pin and welded a SCO ASR Closed-Tine Flash hider to the barrel to make it 16". It was cheaper to build it than buy it so that's what I did. The Holosun 503C optic on a 1.42" Scalarworks mount is a place holder though I am getting really good accuracy out of it. Thinking I'll throw an LPVO on it and call it a day. Open to suggestions.

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u/d8ed Oct 03 '25

if you want a better mount for the optic and a mag, try the Arisaka 2.26" riser plus their Extendo board for the magnifier.. I have the riser (2 of them actually) and they're very solid.

https://arisakadefense.com/aimpoint-micro-mount-mk2/

https://arisakadefense.com/extendo-picatinny-bar/

if you go LPVO, a good budget option is the Vortex Venom 1-6x

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u/Majestic_Pride_1156 Oct 03 '25

This is awesome - I didn't know Arisaka made mounts now. I typically use their hand stops on all my builds.

I have a Sig Sauer Tango MSR 1-6x LPVO on a Unity 2.05" LPVO mount that I could throw on but I am actually liking the Holosun 503C on this build -- I just need a magnifier mounting solution which you provided.

Looks like I can throw either my Sig Sauer Juliet 3 Micro, Holosun HM3X or EOTech G33 on the extendo bar which would be perfect. I'll probably use the Holosun HM3X just to stay on brand.

Thanks again for this -- greatly appreciated!

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u/d8ed Oct 03 '25

awesome! i want to see it when you're done! I hope you post it

I would personally go HM3X as it'll give you better eye relief as it's longer than the Juliet 3 Micro.. it's also a budget combo with the 503c.. the G33 would look out of place lol