Have you ever wished for the ability to take down or assemble your AR-15 upper and lower receivers in less than a second? Me either. Now that I’ve experienced it, though, I realize that we’ve all been missing out.
This is the X-Ordnance X1-15. In my case it’s a .22 LR, but X-Ordnance builds ’em in 5.56 as well, in both pistol and rifle flavors, and also sells stripped receiver sets.
The 7075 aluminum billet receivers are really nice. Machining quality, fit, and finish is great. I dig the aesthetics and the upgraded touches like a flared magazine well, right-side bolt release (hidden by the dust cover in the photo above), large gate around the magazine release, and more.
It’s a good looking, matched receiver set to be sure.
Since my gun is a 22 LR and the bolt carrier doesn’t extend out of the receivers it has a Picatinny rail adapter mounted into the receiver extension threads. This area of the lower receiver is standard, though, so in 5.56 and other calibers you’ll run a buffer tube at rear like usual.
To see the real trick up the X1-15’s sleeve, though, you gotta watch the YouTube video embedded at top (or click HERE).
Upper and lower receivers can be separated in less than a second. They snap back together in less than a second, too. You can do this with a magazine inserted in the lower and a round chambered in the upper, meaning you can pack your takedown rifle taken down, snap it together in a blink, and be ready to rock immediately.
The process and the mechanism is nice and simple, too . . .
See that line down the front sides of the magazine well? The front strap is spring-loaded and it slides downward.
Pulling it down against the spring tension exposes a lug on the bottom, front of the upper receiver. It’s in a similar spot as the pivot pin hole on a standard upper, it just works differently.
Likewise, the lug under the rear of the upper receiver is in a similar spot as the standard takedown pin hole but, like the front lug, it’s open at the rear. It’s a hook — a rear-facing L or a C or a U depending on which letter you prefer — instead of a hole.
So the process is pull down, then pull forward. Pull down on the magwell front strap, pull forward on the upper.
There’s a little shelf inside the rear of the lower receiver that secures the upper’s rear lug.
Likewise, at the front of the lower there are multiple features that help retain the front lug. This is a system that X-Ordnance has patented.
Assembling upper and lower takes slightly more precision but it’s also super fast and easy. The “trick” is that the upper clicks into place without even having to pull the front strap down if you come at it from a bit of an angle. Instead of installing the upper straight back, bring the upper down and back simultaneously and that front lug will push the front strap downward as it finds its home, and then the front strap clicks up on its own and locks everything in place.
After about five practice ‘assemblings’ I had it down pat. I can now take down and assemble the X1-15 receiver set in about as much time as it takes to clap my hands together.
Believe it or not, this system works extremely well. Not only is it fast and easy, it’s super secure. The fit between upper and lower is as good as on any AR-15 I’ve ever played with, meaning there’s zero wiggle. There’s no play, there’s no slack. Upper and lower may as well be screwed together for how it feels.
In video and social media comments there were some people saying they’d be afraid of separating upper and lower accidentally. I understand the concern and I’m not saying it’s impossible, but you’d have to shove the magwell front strap against an object in a manner that pulls it down against decent spring tension far enough to clear the lug and pull forward on the upper receiver simultaneously. I think we can agree that it’s an unlikely combination.
Perhaps I wouldn’t take it to Fallujah, though I doubt it would make my list of worries if I did. I will, however, count on it for hunting use as I’ve kept the upper and lower and am currently building a 338 ARC SBR truck gun with ’em.
I went from not realizing I wanted this to planning out my X-Ordnance X1-15 truck gun in about 20 minutes. It never occurred to me that the normal AR-15 upper and lower assembly was slow and cumbersome until using this thing. It went from “solution-in-search-of-a-problem” to “dang, this is actually really cool” in one range session.
It’s a whole new world! Find out more on the X-Ordnance website HERE.
Don’t miss the video of the X1-15 in 22 LR in action, and give the ol’ Shooting News Weekly channel a subscribe while you’re there.