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Old 04-21-2022, 08:18 AM
Plunky McPlunker Plunky McPlunker is offline
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Default Can someone help me with red dot options?

Hello...
I recently inherited an M&P15 Sport II. I want to put a red dot on it for absolute co-witness, as I have another rifle set up like that. I used a 1" riser on my other rifle and mounted a TRS-25. I'd like to put a Holosun 507c on the M&P15. Do I need a riser for the Holosun 507c to absolute co-witness? The M&P15 currently has Magpul flip-up, adjustable metal sights. Can you guys give me some red dot options and tell me what parts (risers or anything else) I will need to absolute co-witness with my current setup? Thanks in advance. You guys are awesome.
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  #2  
Old 04-23-2022, 03:07 AM
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The 507c is pretty small for an AR isn't it?

I have a Holosun 510C on an AR pistol that is absolute co-witness with Magpul sights.

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Old 04-23-2022, 11:59 AM
Goblin Goblin is offline
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The Trijicon MRO works great for me. It comes with either a co-witness or lower 1/3 co-witness mount. I have the lower 1/3, just my preference.
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Old 04-23-2022, 05:17 PM
Plunky McPlunker Plunky McPlunker is offline
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Thanks, yous guys. I'm looking at the 510C. Sorry for asking stupid questions. I'm new to AR's.
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Old 04-23-2022, 05:38 PM
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I have the 510C GR on my Sport 2 and love the sight. Was told it does cowitness, have not spent much time checking as rangetime is a bit limited so I work with the optic when able.
I can say the customer service at Holosun was great in answering my questions as this was my first AR and first optic. Just an fyi.
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Old 04-23-2022, 11:04 PM
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Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options?  
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Quote:
Originally Posted by Plunky McPlunker View Post
Thanks, yous guys. I'm looking at the 510C. Sorry for asking stupid questions. I'm new to AR's.

Best way to learn or find out something is to ask a question.

None of use were born with gun knowledge.
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Old 04-24-2022, 09:00 AM
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Another vote for the 510c GR.
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Old 04-24-2022, 09:45 AM
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I'll just share my brief take, It's a rifle, not a handgun or shotgun.

Ditch the red dot idea and put a quality low power variable scope on it with 45 degree offset MagPul flip up irons.

And you're there, done deal.

Last edited by lrb1200; 04-24-2022 at 09:50 AM.
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Old 04-24-2022, 09:56 AM
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Or simply add a 3x magnifier.


Plenty of videos on Youtube comparing magnifiers vs LPVO scopes.
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Old 04-24-2022, 10:38 AM
Charlie Foxtrott Charlie Foxtrott is offline
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Default I put a Kahles Helia RDS on a Marlin lever gun.

And I liked it so much I bought another one for my Barrett REC-7 I would highly recommend one to anyone for a carbine.
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  #11  
Old 04-26-2022, 12:06 AM
giants1 giants1 is offline
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Palmetto State Armory has this Sig Sauer Romeo MSR 1X20mm Green Dot Sight, 2 MOA #SOR72002 red dot on sale for $79; what do you think about it?

Attention Required! | Cloudflare

Last edited by giants1; 05-17-2022 at 03:04 AM.
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Old 04-26-2022, 08:12 AM
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Definitely opt for the 510C. 507 is too small for quick target acquisition on the AR; be it SBR, etc. Without the spacer, the 510C provides absolute. The 510 is large. Make sure you keep it on the upper only.
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Old 04-26-2022, 08:59 AM
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Another vote for the HS510C for ~25-50yd. I also like my Vortex PST 1-6x24 for ~100yd+ stuff.
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Old 04-26-2022, 01:14 PM
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I like the Holosuns as well but I have the 512C, think of it as a completely enclosed 510C. The 512C has a closed emitter design and a QR battery compartment. I really like my 512C: Attention Required! | Cloudflare
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Old 04-26-2022, 01:38 PM
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Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options? Can someone help me with red dot options?  
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Holosun 510C works great for me.
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Old 04-28-2022, 06:36 PM
Plunky McPlunker Plunky McPlunker is offline
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I purchased the 510C. I did consider the 512C, but found the 510C for $250 shipped. Just waiting for it to get here. I'm pretty excited about it. I do want to thank all of yous guys for always helping me. The information and experience you all provide has guided me to some really great purchases.
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Old 05-09-2022, 06:18 PM
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I picked the Sig Romeo MSR for my Tippman Arms M4-22. I wanted to try an inexpensive green dot to see if I liked it before possibly stepping up to a LPVO. It performs well enough for plinking and targets and at 50 yards I had no trouble keeping groups under 2". With the supplied high mount you get an absolute co-witness with MBUS sights. My only problem with it or any other red dot is my astigmatism, though not very bad, keeps me from seeing a sharp crisp dot.
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Old 05-09-2022, 07:52 PM
Plunky McPlunker Plunky McPlunker is offline
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I sighted in the 510c over the weekend. It was pretty much dialed in right out of the box, as were my mbus pro sights. Only took about 10 shots for each to get good grouping at 50 yards. Then 90 shots of fun.
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