Magpul ACS-L Black Stock + Carbine Buffer Tube Kit
$115.95
This kit bundles the genuine Magpul ACS-L stock in black with a complete mil-spec carbine buffer tube assembly for a storage-equipped, adjustable-cheek-weld AR-15/M16 setup in one order.
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Magpul ACS-L Black Stock + Carbine Buffer Tube Kit
This combo brings together the genuine Magpul ACS-L stock in black with a complete mil-spec carbine buffer tube assembly, so everything for the rear of your lower arrives in one order. The ACS-L keeps the enclosed storage and ambidextrous QD sling sockets of the full ACS while trimming weight.
Included in This Combo
- Magpul ACS-L Carbine Mil-Spec Stock — Black (MAG378-BLK)
- 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 combo kit?
A: The genuine Magpul ACS-L stock in black plus a complete carbine buffer tube assembly — receiver extension, buffer, recoil spring, castle nut, and end plate. You only need to supply the lower receiver; everything else needed to mount the stock is in the box.
Q: How is the combo different from the stock-only listing?
A: On its own, the ACS-L (MAG378BLK) is just the buttstock — no tube, buffer, spring, castle nut, or end plate. This combo adds the full carbine buffer tube assembly so you can finish the lower in one order instead of sourcing parts piecemeal.
Q: What’s the difference between the ACS-L and the standard ACS?
A: The ACS-L (“Light”) drops the ACS’s side battery tubes to cut weight while keeping the enclosed butt storage and dual QD sockets. It also adds a free-floating cheek piece you can adjust or remove independently, giving a more customizable cheek-weld height than the ACS’s fixed piece.
Q: Can I adjust the cheek weld height?
A: Yes. The ACS-L’s cheek piece floats free of the main body, so you can fine-tune cheek-weld height — useful for getting a consistent head position behind a higher optic or riser.
Q: Will the included tube fit the ACS-L, and does it work on an 80% lower?
A: Yes on both. The assembly is mil-spec diameter (~1.148″), exactly what the ACS-L is cut for, so stock and tube are matched in the box. It installs on any standard mil-spec AR-15/M16 lower, including home-finished 80% lowers — plan on a castle nut wrench and a punch or armorer’s tool to torque the nut and stake the end plate. Made in the USA and ships fast from Daytona Tactical.
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