SAG S20009 AR Stock Adapter for 5.5 mm Trunnion
- $249
In short: The SAG S20009 replaces the original folding unit on a compatible 5.5 mm rear trunnion and provides an interface for Mil-Spec or Comm-Spec AR stock tubes. Its CNC-milled aluminum body includes two QD sling sockets, a paracord loop and locking-device slots.
Compatibility checkpoint
- Manufacturer-documented hosts: AK-100 series, Saiga, Saiga-308, Vityaz and Saiga-9 configurations with the matching 5.5 mm rear trunnion.
- Required rear interface: compatible 5.5 mm rear trunnion.
- Resulting interface: Mil-Spec or Comm-Spec AR stock tube; SAG notes that Comm-Spec has a looser fit.
- Do not select for: 4.5 mm, fixed or otherwise different rear interfaces.
- Locking provision: slots are provided for the locking devices used on compatible Saiga configurations.
- Axis position: the tube axis is raised by 7 mm.
Purpose
The adapter converts the documented 5.5 mm rear interface to an AR stock-tube interface. QD sling sockets at the 3 and 9 o'clock positions support left- or right-side attachment, while the integrated loop provides a separate paracord attachment point.
Technical specifications
| Model | S20009 |
|---|---|
| Body material | CNC-milled high-strength aluminum alloy |
| Rear interface | 5.5 mm trunnion |
| Stock-tube compatibility | Mil-Spec and Comm-Spec |
| Sling attachment | Two QD sockets at 3 and 9 o'clock; paracord loop |
| Tube-axis offset | Raised by 7 mm |
What's in the Box
| SAG S20009 AR stock adapter | × 1 |
Installation
Install the adapter only on the documented 5.5 mm rear interface and follow the manufacturer's installation manual. Confirm the receiving interface and chosen stock-tube standard before assembly.
Frequently asked questions
Which rear interface does S20009 require?
It is documented for a compatible 5.5 mm rear trunnion.
Which AR stock-tube standards fit?
Mil-Spec and Comm-Spec are supported. SAG notes that Comm-Spec fits more loosely.
Does it have QD sling points?
Yes. It has two QD sockets positioned at 3 and 9 o'clock, plus a paracord loop.
How is the stock-tube axis positioned?
The manufacturer specifies that the tube axis is raised by 7 mm.
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