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The Bilson Arms BA-15FCP is a complete .338 ARC upper built around a 12.50-inch threaded barrel, and it drops onto a standard AR-15 lower to give you .338-class terminal performance without stepping up to a bigger AR-10 frame. The .338 ARC borrows the 6.5 Grendel bolt face and feeds from standard AR-15 magazines, so getting into it is mostly a matter of pairing this upper with a compatible bolt carrier group and your existing lower. It's a caliber Hornady tuned around subsonic performance, delivering roughly 1.5 times the energy of subsonic .300 Blackout, while still handling supersonic 175-grain loads out to a few hundred yards from the same barrel and gas settings.
The headline feature here is Bilson's patented forward-charging system. Instead of reaching back to a rear charging handle, you cycle the action from a pump-style handle on the handguard, which means you never break your cheek weld or shift your grip to chamber a round or clear a jam. It runs as a non-reciprocating handle during normal semi-auto fire, staying put while you shoot and only moving when you work it manually. For suppressed and precision-minded shooting, keeping your eyes on target through a malfunction is a real advantage.
The 12.5-inch barrel is 416R stainless, cold hammer forged, with a 1:8 twist that's dialed in for stabilizing those heavy .338 projectiles. The muzzle comes threaded and wears an A2 birdcage flash hider, so swapping to a suppressor or brake is straightforward. A free-floating M-LOK handguard gives you plenty of real estate for optics, lights, and lasers, and the receiver set is finished in a two-tone Flat Dark Earth and Sniper Green Cerakote that looks sharp and holds up to field use.
Bilson Arms machines these in-house at their Broussard, Louisiana facility using match-fit billet aluminum receivers, and the whole thing is made with American parts and materials. If you already run the AR-15 platform and want to add serious big-bore, suppressor-friendly capability with a genuinely different charging setup, this upper is a compelling way to do it.
Yes. The .338 ARC is built on the 6.5 Grendel case head and runs on standard AR-15 lowers and magazines, so this upper mates up to a mil-spec lower. You'll want a bolt carrier group set up for the .338 ARC bolt face to complete the build. That drop-in compatibility is a big part of the appeal versus stepping up to an AR-10.
Instead of a rear charging handle, Bilson puts a pump-style handle on the handguard that you push and pull to cycle the action. It's non-reciprocating during normal semi-auto fire, so it stays still while you shoot and only moves when you work it by hand. The payoff is being able to chamber rounds or clear malfunctions without pulling off your cheek weld or losing your sight picture.
It can. Hornady designed the .338 ARC to cycle reliably with both its 307-grain subsonic SUB-X and 175-grain supersonic BLACK loads from the same setup. The subsonic side is where it really shines, putting out roughly 1.5 times the energy of subsonic .300 Blackout, which makes it a strong choice for suppressed shooting and short-range hunting.
Yes, the 12.5-inch barrel comes threaded from the factory and ships with an A2 birdcage flash hider installed. That makes swapping over to a suppressor or a different muzzle device straightforward. Given how well the .338 ARC pairs with a can, most folks running this upper will want to take advantage of that.
| UPC | 850067503712 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | P7UFSFG10R1 |
| Action | |
| Barrel Finish | Black |
| Barrel Length | 12.5" |
| Caliber/Gauge | .338 ARC |
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