MAGPUL AR-15 UBR Gen 1 Stock Black



Weight 1.46 lbs

The Magpul UBR Gen 1 stock is the perfect upgrade to your service rifle. The UBR is a heavy duty stock with 7 position at .56” intervals which extends ½” longer than an A2 Stock. The UBR is also one of the heaviest adjustable stocks on the market at 1.46 lbs. The modular design offers the stability of a fixed stock with the consistent cheek weld in any position. This is the most robust collapsible stock we have ever used.

*NOTE: This is the official Magpul UBR Gen 1 which has been discontinued by Magpul. 

The UBR includes the required extension tube and mounting hardware. It DOES NOT include a M4 carbine buffer and spring which are required for use with the UBR. (7.62x51 ARs may require the use of a custom short buffer and spring.)

Gen1/Gen2 UBR Comparison 

UBR Collapsible Butt Stock GEN 1
Weight: 1.46 lb.
Weight, w/ Entry Receiver Extension: 1.63 lb.
Length, Stock: 8.00-11.36 in.
LOP Adjustment: 7-Position (0.56 in. / position)
LOP Adjustment Range: 3.36 in.
LOP, Collapsed (M4/M16): 11.10 in.
LOP, Extended (M4/M16): 14.46 in.

A weight is available which fits into the cavity on the stock and adds 15oz. Additional weights are available which can add 10.2 oz (4ubrexwtS) or 13.3 oz (4ubrexwtL).

(Magpul p/n MAG330)