Key Arma FSM2 Buttstock: Mil-Spec Polymer Stock for AR and AK Platforms
Some stock designs stick around because they work. The Key Arma FSM2 follows the classic AR-15 buttstock architecture that has been proving itself on rifles across military, law enforcement, and civilian platforms for decades. There is no experimental geometry or gimmick here. It's a mil-spec polymer stock shaped around a form factor that millions of shooters already know how to shoulder instinctively.
At 175 grams, the FSM2 adds almost nothing to the rear of your rifle while still providing a solid, repeatable cheek weld and a positive shoulder pocket. The polymer body handles rough treatment without cracking or chipping, and unlike metal-bodied alternatives it won't transfer cold or heat directly to your face during extended sessions in harsh weather. Drop it on concrete, drag it through sand, toss it in the back of a vehicle with the rest of your range gear. The material shrugs it off.
A QD sling swivel socket sits at the back of the stock near the buffer tube adjustment button, putting your sling attachment point exactly where most two-point and single-point configurations work best. The rear placement keeps the rifle hanging naturally at your side when slung, and the quick-detach fitting means you can clip on or release your sling in seconds without fumbling with loops or threading webbing through slots.
Mounting the FSM2 to any standard mil-spec buffer tube is a completely tool-free process. Press the adjustment lever, slide the stock on, and lock it at your preferred length of pull. Removing it is the same sequence in reverse. No Allen keys, no roll pins, no stripped screws. If you can operate the charging handle on your rifle, you can swap this stock.
Specifications
| Model |
Key Arma FSM2 |
| Compatibility |
AR / AK mil-spec buffer tubes |
| Dimension |
Mil-Spec |
| Material |
Polymer |
| Weight |
0.175 kg |
| Sling Mount |
QD swivel socket (rear, near adjustment button) |
| Installation |
Tool-free slide-on |
A proven stock shape built from modern materials at a sensible weight. Buy the Key Arma FSM2 mil-spec buttstock online at NeonSales, delivered across South Africa.