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Building an AR-15 from parts is one of the more satisfying projects out there, but wrangling roll pins, tiny springs, and detents into a stripped upper isn't everyone's idea of a good time. This Luth-AR A3 flattop upper receiver skips all of that. It arrives fully assembled with the charging handle, forward assist, shell deflector, and ejection port cover already installed, so you can move straight to mounting your barrel assembly and glass instead of hunting for a dropped spring on the shop floor.
The receiver is precision machined from a 7075-T6 aluminum forging, which is the same tough alloy you'll find on quality mil-spec-style uppers. The hardcoat anodized black finish holds up to handling and holster wear without scratching easily. It carries an M4-type feed ramp that helps rounds chamber smoothly, plus the shell deflector and brass-friendly geometry you'd expect from a receiver meant to run hard.
Up top is a 12-position Picatinny flattop rail, giving you plenty of real estate to mount a red dot, LPVO, magnified scope, or a set of flip-up backup sights. The flattop A3 design keeps everything on one plane, so co-witnessing irons with a dot or running a scope at your preferred eye relief is straightforward.
This is a foundation piece for a standard .223/5.56 AR-15 build. You'll still need a barrel, bolt carrier group, gas system, and handguard to complete the upper, then a lower to finish the rifle. Because Luth-AR builds to spec, it plays nicely with the usual aftermarket parts you're likely already sourcing. For a first-time builder, having the forward assist and dust cover already pinned in takes a couple of the trickier steps off the list and gets you to the range sooner.
It comes fully assembled with the charging handle, forward assist, shell deflector, and ejection port cover already installed. You won't need to press in any of those small pins yourself. Keep in mind it's still a bare receiver assembly, so you'll add your own barrel, bolt carrier group, gas system, and handguard to finish the upper.
The 12-position Picatinny flattop rail accepts standard Picatinny-mounted optics, so red dots, LPVOs, magnified scopes, and flip-up backup sights all bolt right on. The single-plane A3 design also makes it easy to co-witness a dot with your iron sights. You've got plenty of rail length to position your optic for proper eye relief.
Yes. Luth-AR machines this receiver to standard spec, so it pairs with the common mil-spec-style barrels, bolt carrier groups, and handguards you're likely already shopping for. As with any build, just confirm your gas tube length matches your barrel's gas system before assembly.
It's a solid choice if you'd rather skip the fiddliest part of an upper build. Installing the forward assist and dust cover is where a lot of first-timers lose small springs or mar the finish, and this receiver has those steps done for you. That lets you focus on the barrel install and getting to the range faster.
| UPC | 859819007805 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FTT-EA1 |
| Color | Black |
| Product Type | Upper |
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