ACR Stock Adapter for Swiss Arms/SIG SG550 Series Rifles
These stock adapters allow ACR folding adjustable stocks to be installed on Swiss Arms/SIG SG550* series rifles. The adapters are 3D printed out of a high strength carbon fibre reinforced nylon material that closely matches the mechanical properties, appearance, and texture of the stock.
A significant ergonomic improvement over the standard folding stock, the ACR stock provides a better cheek weld when using optics as well as a 7-position adjustable length of pull. The firearm may still be fired while the stock is folded.
They can be purchased either as the adapter alone, or pre-installed on an ACR folding stock (all original hardware will be included).
A 3/16" punch is required for installation.
*Please note: These adapters are designed to be used with the Swiss-made stamped steel lower receivers only. They do not attach properly on US-made aluminum receivers.