Lee this 10/22 Rifle has a combination scope adapter that permits use of both Weaver style and .22 tip off scope mounts. --- Information from Ruger (America's favorite auto loading 22 rifle, the Ruger 10/22 is a tried and true design that delivers consistent, reliable and accurate performance. It features a cold hammer forged barrel, positive push button cross bolt safety and a combination scope adapter that permits use of both Weaver style and .22 tip off scope mounts. This model has a 20" barrel and a Copper/Mica synthetic stock for striking eye appeal).

Combination scope base adapter for both Weaver® and tip-off style scope mounts included with every Rifle see **** With proven performance, a legendary action and reliable rotary magazine, the 10/22 is sleek, perfectly balanced, rugged and superbly accurate. It looks right, feels right, shoots right and continues to perform under heavy use. It's no surprise that it's been an American classic for over 50 years!
Detachable 10-rd. rotary magazine features a unique rotor to separate cartridges and provide reliable feeding
Cold hammer-forged barrel is locked into the receiver by a unique 2-screw V-block system
*******Combination scope base adapter for both Weaver® and tip-off style scope mounts included with every Rifle
Easy-to-use extended mag release provides smooth, no-fuss removal of the unique, flush-mounted magazine, with no exposed magazine to dent and no protrusions at the balance point
Heat-stabilized, glass-filled polymer trigger housing assembly is precision-made from high-tech material for improved tolerances, impact resistance and unmatched durability
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Key Specifications
Caliber: .22LR
Action: Semi-automatic
Capacity: 10+1
Barrel length: 18.5"
Barrel style: Satin black finish, 1:16" twist
Stock: Copper mica
Length of pull: 13.88"
Sights: Gold bead front / adjustable rear
Overall length: 37"
Overall weight: 5.75 lbs.
Model no.: 21139
UPC: 736676211395