The Leupold QRW two-piece base for Nosler M21 receivers (part no. 183481) is built specifically for that action, giving Nosler M21 owners a cross-slot quick-release interface most generic bases don’t fit. Leupold machines the base from steel with a matte black finish, and the Weaver-style cross-slot design delivers ±1/4 MOA repeatability when removing and replacing an optic. The two-piece layout allows fore-aft scope positioning during installation. Among M21-specific scope bases, this QRW configuration is purpose-built rather than a generic adapter.

Key Specifications

• This base uses a Weaver-style cross-slot interface to work with common cross-slot rails.
• The mounting system is receiver-mounted, providing a direct attachment for secure alignment.
• The package is a 2-piece base set, allowing fore-aft scope positioning and easier installation.
• The base is fabricated from steel, for strength and resistance to deformation under recoil.
• The finish is matte black, reducing glare and matching dark rifle finishes.
• QRW cross-slot designs deliver ±1/4 MOA repeatability when removing and replacing an optic.

Frequently Asked Questions

Is this base specific to the Nosler M21, or does it fit other rifles? It’s machined specifically for the M21 receiver, ensuring correct fit rather than a universal adapter.

What does ±1/4 MOA repeatability mean? It’s how precisely the optic returns to its original zero after being removed and reinstalled on the cross-slot base.

Buy the Leupold QRW Base, Nosler M21

A less common action like the M21 needs a base actually machined for its receiver, and this QRW mount delivers exactly that fit and repeatability. Order it from our Lubbock, Texas gun shop and it ships fast.