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The LBE Unlimited Ready Build Kit is a compact AR-15 upper assembly built around a 12.5-inch Cold Hammer Forged barrel chambered in .223 Rem/5.56 NATO. That 12.5-inch length hits the sweet spot for folks who want something shorter and handier than a 16-inch carbine without dropping all the way down to a stubby pistol build. Cold hammer forging is the same barrel-making process used on a lot of duty and military rifles, and it tends to produce a tough, long-wearing bore that holds accuracy over a high round count. The barrel wears a Melonite finish inside and out for corrosion resistance and wear protection, and the muzzle is threaded 1/2×28 with an A2 birdcage flash hider and crush washer already installed.
This one ships as a complete upper, not a bag of loose parts. The receiver comes with the dust cover and forward assist installed, the gas tube is pinned into a low-profile gas block, and there's a standard charging handle in place. It also includes a Nickel Boron M16-style bolt carrier group, which is a nice touch since the slick NiB coating cleans up easily and runs smoother with less lube. Barrel twist is 1:7, so it stabilizes the full range of common 5.56 loads, with a preference for the heavier 62 to 77 grain projectiles a lot of people run these days.
Because it's a standard AR-15 upper, it drops onto any mil-spec lower and pins right up. You'll want to add a handguard, muzzle attention if you plan to run a can, and your choice of buffer setup on the lower side to get the gas dialed in for the shorter system. For anyone building a compact truck gun, home-defense carbine, or a nimble range blaster, this kit knocks out a big chunk of the parts list in one purchase and gets you shooting faster.
It ships as an assembled upper, not a pile of loose components. The dust cover and forward assist are installed, the gas tube is pinned in the low-profile gas block, and it comes with a NiB M16-style bolt carrier group and standard charging handle. You'll still want to add a handguard and pin it to a lower to have a functioning firearm.
It's a standard AR-15 upper, so it fits any mil-spec AR-15 lower receiver. The takedown and pivot pins line up like any other upper, and you just pin it on. Keep in mind you'll need the rest of the lower build and a buffer system to run it.
The barrel has a 1:7 twist, which stabilizes the whole spread of common 5.56 loads. It really shines with heavier projectiles in the 62 to 77 grain range, though it handles lighter 55 grain plinking ammo just fine too.
The 12.5-inch length makes for a shorter, lighter, more maneuverable build that's great for tight spaces and quick handling. You give up a little muzzle velocity compared to a 16-inch barrel, but you keep plenty of performance for close and mid-range use. It's a popular length for compact carbines and short-barrel style builds.
| UPC | 706612408134 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AR125RBK |
| Action | |
| Barrel Length | 12.5" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Model | |
| Product Type | Kit |
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