The stock and grip are typical “budget” M4-style parts. The forend is a non-free floating quad rail, which looks and feels bulky. Elsewhere on the gun you can tell that it’s meant for “budget conscious” individuals - all of the parts are from either bottom shelf or at least of mediocre design. The upper and lower receiver halves don’t match up even in the slightest, and the area where the metal insert is molded into the gun has errant bits of plastic in it. Just looking at it, the fit and finish on the rifle is pretty hit-and-miss. ATI’s metal insert has only one pin to keep it from flexing, and the attachment point for the receiver extension isn’t even as hefty as an original AR-15’s. Their aluminum block had two pins holding it in place and keeping it from rotating (the takedown pin and the safety selector) and was chunky enough to beat someone to death with. Not too long ago we reviewed another polymer hybrid AR-15, one from MEAN Arms. So rather than relying only on the plastic to keep everything together, ATI slipped a small block of metal into that area to reinforce the pillar. As Cody Wilson found out when he was building his 3D-printed lower receivers, this one area is the easiest to crack or damage if you’re using sub-standard materials. This one little section is subject to the highest strain in the entire gun, since this small flap of material needs to keep everything in line as the bolt carrier group is slammed into the buffer and reciprocates as the action cycles.Īnd speaking of small parts, the threads that hold the buffer tube in place can easily get stripped with enough use. The concept behind the “hybrid” design is to strengthen the weakest part of the AR’s receiver: the rear, where the buffer tube screws into place. Enter the hybrid lower receiver, where a small block of metal is molded into the receiver itself to strengthen it. But with the use of plastic instead of aluminum, you lose some of the rigidity and strength that made the firearm usable. The shortage eventually got to the point where it started making economic sense for companies to make plastic receivers instead of taking all that time to mill out an aluminum forging. With President Obama’s election a few years back and the Great Assault Weapon Scare of 2012, there was a ton of demand for AR-15 rifles.
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