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San Tan Tactical didn't get a reputation for tight-tolerance billet receivers by cutting corners, and that same attention to detail runs through this 11.5" Everything But Lower Kit. As the name suggests, this is a nearly complete AR-15 upper build, missing only the one part that most builders already have an opinion about, the lower receiver. Drop this kit onto a mil-spec or billet lower and you're looking at a finished rifle without hunting down a dozen individual parts or guessing whether they'll play nice together.
The heart of this kit is San Tan's billet 7075-T6 upper receiver, machined to the same tight tolerances the company built its name on. It's paired with an 11.5" 5.56 NATO barrel, an enhanced bolt carrier group finished in Diamond-Like Carbon coating for smoother cycling and better wear resistance, and an upgraded charging handle that's already sized up for serious use. Around the barrel you'll find a free-float M-LOK handguard designed to keep flex to a minimum while still giving you plenty of real estate for lights, grips, or whatever else you're running.
An 11.5" barrel strikes a solid balance for compact builds where maneuverability matters, and San Tan tuned the gas system length specifically for this barrel to keep cycling reliable whether you're running a can or not. The kit's chambered in 5.56 NATO/.223 Remington, so ammo availability is never a headache, and the barrel twist is set up to stabilize the full range of bullet weights builders typically run through a short-barreled 5.56 upper.
Because every part in this kit ships fitted and finished, there's no fitting a barrel nut or worrying about headspace when it arrives. Any standard AR-15 lower will accept this upper without modification, though pairing it with San Tan's own STT-15 lower gets you the matched tolerances the company designed the whole system around. Either way, most of the hard work is already done before it ever reaches your bench.
No, true to its name this kit covers everything on the upper half of the build and stops right at the lower receiver. That means you'll need to supply your own stripped or complete lower to finish the rifle. San Tan's own STT-15 lower is a natural match if you want everything from the same manufacturer.
Yes, the upper is built to standard AR-15 dimensions so it mates up with mil-spec and most billet lowers without any fitting work. You'll get the tightest tolerance fit pairing it with San Tan's matched STT-15 lower, but it's not a requirement.
This kit uses a pistol-length gas system, which San Tan tuned specifically to work with the 11.5" barrel for reliable cycling. It's built to run clean whether you're shooting suppressed or unsuppressed.
Yes, the barrel, BCG, and charging handle all ship installed and headspaced on the upper receiver. You're not stuck buying a headspace gauge or fitting a barrel nut, the upper arrives ready to bolt onto your lower.
| UPC | 810208841523 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | EBTLK-11.5-BLK |
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