Anyone seen this yet? The boys on Reddit posted a link and I ended up ordering one. Been looking for a good quad rail for a 12.5 FSP gun and didn’t like the I beam shape of DD Omega. Picture shows it coming with a single panel. All the expo arms stuff I’ve used has been in spec and gtg. I’ll post an update whenever it gets in.
https://www.primaryarms.com/expo-arms-m4-ras-quad-rail-handguard-carbine-length
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Interesting. They call it “RAS” and it appears to be much like the KAC. I wonder if it’s a legit licensed verision. Good price if it’s legit.
I just got two of the B&T Quad rails which are pretty nice. They’re $120.00. Good to see the quad rails making a small comeback, because I don’t like Mlok at all.
I loved mlok, until I started mounting things to it. Now I miss picatinny.
Expo is PA’s “house brand,” they subcontrat with other companies to make things for them. My guess would be P&S whatever they call themselves now if these are any good.
Same here. I have started the migration back to quad rails.
Must be like Brownell’s is doing.
Sweet music to my ears! Mlok needs to go away!
Pics look right. I could never justify buying KACs when they were laying around for free everywhere, but now that I am old and fat I could use one for sure.
Midway has their own house-brand too (“AR-Stoner”) but it’s hazy who their OEM’s are, at least Primary seems to have chosen reputable suppliers for most of the Expo line and we know Brownells has subcontracted at least some development to B5 Systems and NoDak Spud on their Retro line.
I believe ^this^ is correct, I thought that White Label Armory made their stripped uppers, not sure if they made other parts for them as well.
Also, I don’t really care if it’s Mlok, 1913 rails or keymod, just make it as robust and light as possible, anything over 8lbs for an 5.56 AR is to heavy in my humble opinion.
PA Expo Arms - Uppers and lowers are Mega. BCG’s are Microbest. Rails were CMT but not sure if they are doing the aforementioned quads. Barrels are Rosco.
They have the Expo M5 RAS as well.
Quads for life.
Looks like I am going to be selling a Centurion 9.5 and 13 inch MLOK rail here soon to fund Operation Return To Quads. 
I think I have two of those that I’ve been keeping for a few years, but I did order the standard carbine model. It will be interesting to see how it is once it arrives.
If these are decent, I think KAC and P&S prices are going to tank, either that or just sit on shelves. Cloning is about to kick back off in higher gear!!
I’m gonna be the heretic here and say “Horses for Courses.” If you need a robust mount where weight and size are no object, quadrail all the way. If weight, space and minimalism are the priority of the day (like a ASDW or a bugout-bag build) M-Lok has an edge.
The only reason I’m not buying the Expo M5 to complete my M16A4 URG is that I already have an M5 brought home by the friend this project is in memory of… I just have to excavate Mt. Deadtree in my storage unit enough to disinter it from its grave under boxes of cookbooks and other stuff.
I paid too much for a few P&S rails because I thought the M4 RAS was going the way of the N4 Colt stock. Now I have two extra carbine Quad rails on the shelf. It’s a good problem.
Looking at the non RAS quad rails it does kind of look like the CMT version they had out with the lightening holes in it before their current version. Maybe they are making these too?
Is this about repeated installation/removal, or set it and forget it? I can easily see how 1913 is easier for the former, but I don’t see how MLOK is a problem for the latter.
For me its neither. I have just found that from an ergonomic standpoint I like a quad rail better. Just fits my hand and grip better. I’m no operator by any stretch of the imagination so take that for what its worth.
That’s interesting. What’s your glove size? Have you tried a Magpul M-LOK AFG?