Weaver Grand Slam S402 Two Piece Top Mount Base Review

The Weaver Grand Slam S402 Two Piece Top Mount Base Made a Bold First Impression

As a seasoned outdoor and tactical gear specialist, I’ve seen countless mounting systems come and go. But the Weaver Grand Slam S402 Two Piece Top Mount Base immediately caught my attention due to its promise of precision and rock-solid reliability. Its simple design and reputation for recoil resistance suggested a foundation built to last.

I was experiencing frustrating inconsistencies with my current scope mounting setup on my deer rifle. The rings were constantly loosening after a day on the range or during a hunt, resulting in accuracy issues and lost confidence. I wanted a straightforward, no-nonsense base that would hold zero through thick and thin.

Upon unboxing the Weaver Grand Slam S402 Two Piece Top Mount Base, I was immediately impressed with the feel of the steel. The bases have a substantial weight and the machining appeared clean and precise. It felt more robust than some of the aluminum bases I’ve handled in the past.

Compared to some of the more complex Picatinny rail systems I’ve used, the Weaver Grand Slam S402 Two Piece Top Mount Base offers a refreshing simplicity. I considered a one-piece Picatinny rail for maximum versatility, but ultimately chose the Weaver base for its streamlined design and reputation for strength on dedicated hunting rifles. My initial reaction was one of cautious optimism.

Real-World Testing: Putting Weaver Grand Slam S402 Two Piece Top Mount Base to the Test

First Use Experience

My initial testing ground for the Weaver Grand Slam S402 Two Piece Top Mount Base was the local shooting range. I mounted the bases on my trusted Remington 700 .30-06, pairing them with a quality set of Weaver Grand Slam rings and my go-to hunting scope. The first few shots revealed zero shift!

I also tested the setup during a particularly wet and blustery day at the range. Despite the harsh conditions, the bases remained firmly in place, and the scope maintained its zero. The confidence inspired by this initial performance was significant.

Mounting the bases was relatively simple, requiring only a few minutes and basic tools. The square-cut notch design made for easy ring alignment. However, I did find that properly torquing the screws was crucial for ensuring a secure and reliable mount.

Extended Use & Reliability

After several months of consistent use, including multiple range trips and a week-long elk hunt in the Rockies, the Weaver Grand Slam S402 Two Piece Top Mount Base has proven its worth. There has been no noticeable shift in zero. I am very pleased with the bases’ performance in holding my scope securely.

The bases show no signs of wear and tear, despite being subjected to harsh weather conditions and the recoil of a powerful hunting cartridge. The finish has held up remarkably well. They wipe down quickly and are easy to keep clean.

In comparison to my previous experiences with less robust mounting systems, the Weaver Grand Slam S402 Two Piece Top Mount Base has been a significant upgrade. My previous setup consistently required adjustments and re-tightening. Now I can focus on the shot instead of worrying about my scope.

Breaking Down the Features of Weaver Grand Slam S402 Two Piece Top Mount Base

Specifications

The Weaver Grand Slam S402 Two Piece Top Mount Base is a precision-machined steel base designed for specific rifle models (Remington 700 short action in my case). The base features a square-cut notch that mates to the cross bolt found on Weaver top mount rings, ensuring a secure and repeatable mounting surface. Custom hardened fastening screws are included for optimal installation.

This specific S402 base is designed for a custom fit on compatible firearms. The choice of steel construction ensures exceptional strength and resistance to recoil, which is critical for maintaining zero over time. The included screws contribute to a secure and reliable mounting solution.

Performance & Functionality

The Weaver Grand Slam S402 Two Piece Top Mount Base performs its job admirably: providing a stable and reliable platform for mounting a scope. Its strength is in its simplicity and robust construction.

The straightforward design minimizes potential points of failure. However, precise installation is essential to ensure proper alignment. The base exceeded my expectations in terms of its ability to withstand recoil and maintain a consistent zero.

Design & Ergonomics

The design is simple, functional, and unobtrusive. The steel construction is robust and inspires confidence. Its weight adds a negligible amount to the overall weight of the rifle.

The base is user-friendly. Anyone with basic gunsmithing skills can install it quickly and easily.

Durability & Maintenance

The steel construction and durable finish suggest that the Weaver Grand Slam S402 Two Piece Top Mount Base will last for years. Minimal maintenance is required; simply wipe down the bases with a clean cloth after each use to remove any dirt or debris.

I anticipate that the bases will outlast my rifle. The Weaver Grand Slam S402 Two Piece Top Mount Base is built to withstand the rigors of heavy use and harsh environmental conditions.

Accessories and Customization Options

The Weaver Grand Slam S402 Two Piece Top Mount Base itself doesn’t offer customization in the traditional sense. However, it’s compatible with a wide range of Weaver-style scope rings from Weaver and other manufacturers.

Choosing the right rings is crucial for achieving optimal scope height and eye relief. There are no included accessories aside from the necessary mounting screws.

Pros and Cons of Weaver Grand Slam S402 Two Piece Top Mount Base