Monstrum Deadlock Series Dual Ring Scope Mount - Rigid Unibody Design

Our review of the Monstrum Deadlock Series Dual Ring Scope Mount finds it best suited to shooters who want a lightweight, rock-solid mount that keeps optic alignment under heavy recoil. The single biggest reason to buy is its rigid unibody construction with precision Picatinny locking bolts, which customers consistently praise for holding zero and fitting tightly to flat top rails. This review focuses on fit, build quality and practical use on AR-style rifles where repeatable zero and low weight matter most.

Key Features

• Unibody design: The rigid unibody construction reduces flex and improves repeatable zero under recoil compared with multi-piece mounts.
• Lightweight: At about 3.7 oz for the inline version and 3.9 oz for the long offset, it trims carry weight without sacrificing strength.
• Three mounting configurations: Choose inline, 1 in offset cantilever, or 2 in offset cantilever to position the optic where you need it for eye relief and rifle geometry.
• Multiple ring sizes: Available in 1 in, 30 mm and 34 mm diameters to fit a wide range of scopes and objective sizes.
• Secure Picatinny interface: Custom Picatinny locking bolts slot into flat top rails with no wiggle, delivering a confident hold and preserved zero.
• Lifetime guarantee: Backed by a lifetime guarantee, offering long-term peace of mind for hard use.

Who It's For

This mount suits competitive shooters, hunters and range enthusiasts who mount optics on flat top Picatinny rifles and want a combination of light weight and strong, repeatable holding power. It is particularly well matched to AR-style rifles where a compact, tactical-looking mount and reliable locking are priorities.

Those who need extremely low-profile mounts for unusual optics or integrated mounting systems, or who require ambidextrous quick-detach functionality, may want to look elsewhere. Likewise, buyers seeking exotic materials or elaborate aesthetic options should consider other specialty mounts.

Pros & Cons

Pros

• Well-machined unibody construction provides excellent build quality and a solid feel.
• Significant weight reduction over previous generation mounts while maintaining strength.
• Multiple ring sizes and offset options give genuine flexibility for eye relief and optic choice.
• Strong locking bolts and secure Picatinny engagement deliver consistent zero retention.

Cons

• Offset versions add slight weight compared with inline; choose configuration carefully for weight-sensitive builds.
• Not a quick-detach design, so swapping optics in the field is slower than QD mounts.

Specifications

Design	Rigid unibody with lightening cuts
Weight	Inline 3.7 oz; Long offset 3.9 oz
Mount configurations	Inline, 1 in offset cantilever, 2 in offset cantilever
Ring diameters	1 in, 30 mm, 34 mm
Rail type	Flat top Picatinny
Locking	Custom Picatinny locking bolts with zero wiggle
Guarantee	Lifetime

Our Verdict

The Monstrum Deadlock Series Dual Ring Scope Mount is a sensible buy for shooters who need a low-weight but very stable mounting solution that holds zero on flat top Picatinny rifles. Strong machining, secure locking bolts and three configuration options deliver real value for AR-platform users and anyone prioritizing repeatable accuracy without excess weight.

Frequently Asked Questions

Will this mount fit my flat top Picatinny rail?
Yes, the mount is designed to slot into standard flat top Picatinny rails using custom locking bolts that eliminate wiggle.

What ring sizes are available?
It is offered in 1 in, 30 mm and 34 mm ring diameters to suit most scopes.

Does it come with a warranty?
Yes, all Monstrum products are backed by a lifetime guarantee.