The Strike AR Picatinny Stock Adapter gives the user the ability to mount a 1913 Picatinny interface stock/stabilizer assembly where normally the receiver extension is attached. For ARs that do not need an in-line buffer and buffer spring to function, this is a simple, fast and budget friendly conversion that works on both AR-15 and AR-10 lower receivers. The Strike AR Picatinny Stock Adapter mechanism threads into a standard AR rear 1 3/16"-16 HSS right hand thread and has an anti-loosening detent that is very positive and tactile while keeping the rear detent spring captured for the rear takedown pin. The 1913 Picatinny section of this adapter includes a 4-slot rail section. As an added feature, there is a 360° free swivel QD socket that the user can orientate to either left or right side to best configure the preferred setup. Compatible with majority of folding stocks or stabilizers on the market. When you want to use an upper receiver where everything is self-contained, quickly convert your AR lower receiver to mount a Picatinny stock or stabilizer with the Strike AR Picatinny Stock Adapter.