Monstrum Deadlock Dual Ring Scope Mount, 1-Inch Forward Offset

The Monstrum Deadlock dual ring scope mount is listed in a 1-inch forward-offset configuration for 1-inch scope tubes. Its rigid aluminum design is intended for flat-top Picatinny rails, while the offset may help place an optic farther forward than an inline mount.

At a glance

Rigid unibody design with lightening cuts, according to the listing.
The described mount uses custom Picatinny locking bolts and is intended for flat-top Picatinny-equipped rifles.
The Deadlock series is offered in inline, 1-inch offset, and 2-inch offset configurations, and in 1-inch, 30 mm, and 34 mm diameters. Those options are not all included with this selection.
Monstrum states that its products are backed by a lifetime guarantee.

Price

$19.99Save 33%

Reference price: ~~$29.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Forward offset offers a configuration choice for positioning an optic relative to an inline mount.
The listing describes a one-piece rigid body and Picatinny locking bolts.
The listed 1-inch ring diameter clearly identifies the intended scope tube size.

Cons

The listed 1-inch ring diameter limits this configuration to scopes with a matching tube diameter.

Technical specifications

8 specifications

Identity
Brand	Monstrum
Model	Deadlock
Part number	ZS142
Color	Black
Configuration	1 inch Forward Offset
Scope ring diameter	1 inch diameter

Dimensions and installation
Weight listed	4.3 ounces

Materials and protection
Material listed	Aluminum

What to know before buying

Listing details to confirm

The listing describes multiple Deadlock configurations, but this selection is specified as 1-inch forward offset with 1-inch diameter rings. Confirm the selected option matches the scope tube and desired placement. Its claims about zero retention and recoil performance are manufacturer claims, not independently verified results. The lifetime guarantee is stated, but coverage terms are not supplied.

Who is it for?

A good fit for

Buyers seeking a 1-inch offset dual-ring mount for a flat-top Picatinny rail.
Users matching a 1-inch scope tube who want a forward-offset mounting position.

Less suited to

Scopes with 30 mm or 34 mm tubes, unless the selected mount is specifically the matching diameter version.
Buyers whose rifles do not have a flat-top Picatinny rail.

Monstrum Deadlock Dual Ring Scope Mount, 1-Inch Forward Offset · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 969 ratings

5 stars85%85%
4 stars11%11%
3 stars3%3%
2 stars0%0%
1 star1%1%

Customer feedback highlights perceived value, solid construction, secure attachment, scope retention, and alignment. Some customers report that the mount stays put once snugged down, and one account describes maintaining zero after 500 rounds. These experiences are relevant to buyers seeking a stable Picatinny mount, but they do not independently verify the manufacturer's performance claims. The overall rating distribution is mostly five-star, with a smaller share of lower ratings, and does not explain why individual customers rated it as they did.

Positive themes

Customers describe the mount as well constructed and appreciate its secure attachment.
Feedback mentions solid scope retention and alignment, including a report of maintaining zero after 500 rounds.

Frequently asked questions

What scope tube diameter is this listing configuration for?

The selected details specify a 1-inch diameter. The series is also described as available in 30 mm and 34 mm configurations, so select the size that matches the scope.

What rail does the mount fit?

The listing describes it for flat-top Picatinny-equipped rifles, using custom Picatinny locking bolts.

Is this an inline or offset mount?

The selected style is listed as a 1-inch forward offset. Inline and 2-inch offset versions are described as separate Deadlock configurations.

What does the listing say about warranty coverage?

Monstrum states that all its products are backed by a lifetime guarantee. Specific terms are not provided here.