MAGPUL UBR™ Collapsible Stock
Mounts on durable Entry Receiver Extension tube (included) to accommodate the common M4 carbine buffer and spring
7-Position LOP adjustability with customizable preset system for fast access to preferred length
Solid “fixed stock” lockup in all positions
Enhanced lock mechanism w/ integral impact buffer increases drop strength and shock reduction
The UBR includes the necessary Entry-Length Receiver Extension tube and all mounting hardware. An M4 carbine buffer and spring are required for use with the UBR and are not included.
7.62x51 ARs may require the use of a custom short buffer and spring.
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