Magpul ACS-L Stock FDE Kit with Carbine Buffer Assembly
$115.95
This kit bundles the genuine Magpul ACS-L stock in Flat Dark Earth with a complete mil-spec carbine buffer tube assembly for a storage-equipped, adjustable-cheek-weld AR-15/M16 setup in one purchase.
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Magpul ACS-L Stock FDE Kit with Carbine Buffer Assembly
This kit pairs the genuine Magpul ACS-L stock in Flat Dark Earth with a complete mil-spec carbine buffer tube assembly, so everything for the rear of your lower arrives together. The ACS-L keeps the enclosed storage and ambidextrous QD sling sockets of the full ACS while trimming weight and tucking the release latch away from snags.
Included in This Combo
- Magpul ACS-L Carbine Mil-Spec Stock — Flat Dark Earth (MAG378FDE)
- Mil-spec carbine receiver extension (6-position buffer tube)
- Carbine buffer
- Action/recoil (buffer) spring
- Castle nut
- Receiver end plate
ACS-L Stock Specs
- Drop-in replacement for AR-15/M16 carbines on mil-spec receiver extensions
- Enclosed butt storage compartment (battery tubes removed to save weight vs. full ACS)
- Free-floating, independently adjustable cheek piece
- Supplemental friction lock minimizes stock wobble on tube
- Ambidextrous QD sling sockets
- Compatible with mil-spec carbine receiver tubes (1.148″ diameter)
- Made in the USA
WARNING (Prop 65): This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.p65warnings.ca.gov.
| Weight | 2 lbs |
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Q: What’s included in this ACS-L FDE combo kit? A: The genuine Magpul ACS-L stock in Flat Dark Earth plus a complete carbine buffer tube assembly — receiver extension, buffer, recoil spring, castle nut, and end plate. The only thing you add is the lower receiver; the rest of the stock setup is covered.
Q: How is the combo different from the stock-only listing? A: Bought alone, the ACS-L (MAG378FDE) is the buttstock only — no tube, buffer, spring, castle nut, or end plate. The combo includes the full buffer tube assembly so the lower can be finished in a single order.
Q: Does the FDE shade match other Flat Dark Earth Magpul parts? A: Magpul holds a consistent FDE across its current polymer lineup, so this stock blends with Magpul FDE grips, handguards, and magazines. “FDE” varies a little between brands, but Magpul-to-Magpul stays closely matched.
Q: What does the ACS-L’s adjustable cheek piece do? A: The cheek piece floats independently of the main stock body, letting you raise or lower cheek-weld height for a repeatable head position — handy with magnified optics or taller mounts. That adjustability is the main upgrade over the standard ACS’s fixed cheek piece.
Q: Will the tube fit the ACS-L, and can I run it on an 80% lower? A: Yes to both. The included receiver extension is mil-spec diameter (~1.148″), matched to the ACS-L out of the box, and it installs on any standard mil-spec AR-15/M16 lower — including home-finished 80% lowers (you’ll want a castle nut wrench and a punch or armorer’s tool). The ACS-L is made in the USA and ships fast from Daytona Tactical.










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