MDT ACC Interior Forend Weights, 4 Pack

• Internal balance tuning: These weights let the rifle’s center of gravity be moved forward inside the forend, helping the chassis settle more consistently on barricades, bags, and positional supports.
• Clean integration: Because the weights mount inside the barrel channel, they add mass without increasing external bulk, so the rifle keeps a streamlined profile for competition and transport.
• Adjustable placement: Three mounting positions at 20mm (¾”) increments make it easier to fine-tune balance for different barrel contours, optics, and accessory setups.
• M-LOK clearance: Clearance slots on the sides and underside allow M-LOK accessories to remain usable even with the weights installed, preserving flexibility in how the chassis is configured.
• Quick service access: The design allows the weights to be added or removed through the forend area without removing the barreled action, making setup changes faster between builds or match configurations.

About the ACC Series

The MDT ACC series was developed for shooters who want a chassis system built around balance control, positional stability, and competition-oriented ergonomics. In MDT’s lineup, ACC models sit firmly in the precision rifle space, where added mass and careful weight distribution can make a measurable difference in recoil behavior and how steadily the rifle tracks through a shot. Rather than treating weight as an afterthought, the ACC platform was designed to accept both internal and external weighting solutions as part of the chassis system itself.

That design approach makes the ACC family especially relevant for PRS, NRL, and other forms of target shooting where rifles are often tuned to a shooter’s preferred balance point. The series is known for its modular architecture, support for accessory mounting, and compatibility with MDT’s broader ecosystem of chassis components. In practice, ACC products are chosen by shooters who want a rifle that can be configured around a specific discipline, barrel profile, optic setup, or barricade style, while keeping the handling characteristics predictable from stage to stage.

About the MDT ACC Interior Forend Weights, 4 Pack

The MDT ACC Interior Forend Weights, 4 Pack is a chassis-tuning accessory made for shooters who want more control over how their rifle balances without adding external protrusions. Designed for the ACC Premier GEN2 configuration, this set adds 2.08 total weight to the forend area, increasing forward mass in a way that helps the rifle feel steadier on support bags and less reactive during recoil. For precision rifle competition, that can translate into easier spotting of impacts and more consistent follow-through.

Each weight is made from case-hardened steel, giving the system the density needed to add meaningful mass in a compact internal format. MDT also built in side and underside clearance slots, so the chassis can still accept M-LOK accessories with the weights installed. That matters for shooters who run rails, barricade stops, or other forend-mounted equipment and do not want to sacrifice mounting flexibility just to gain weight.

The practical advantage of this system is not only the added mass, but also how it can be positioned. With three mounting hole sets, each weight can be shifted in 20mm (¾”) increments inside the barrel channel to tune the rifle’s balance point around the complete build. Installation is also straightforward, as the weights are designed to be added or removed without taking the barreled action out of the chassis. For match rifles that evolve over time with different barrels, optics, or accessories, that makes the ACC Interior Forend Weights a useful way to keep the rifle’s handling consistent.

About MDT

MDT Sporting Goods was established in 2009 and began in Chilliwack, British Columbia, Canada. The company focuses on products for target shooting and hunting, with a range that includes rifle chassis systems, magazines, buttstocks, and accessories. MDT identifies the TAC21 as its first chassis, which reflects how central chassis design has been to the company from the beginning.

Today, MDT’s head office remains in British Columbia, Canada, and the brand is closely associated with modular rifle systems and supporting components for precision shooting. MDT states that its chassis, magazines, and accessories are developed with input from competitive precision shooters, which helps explain the practical, match-oriented design seen across products such as the ACC weighting system.

Main Features

• Manufacturer: MDT
• Made in: USA
• Accessories for: Rifles
• Compatibility: MDT ACC Premier GEN2 chassis
• Total weight: 2.08 total weight
• Weight per piece: 0.52 lbs / weight (including screws)
• Material: Case-hardened Steel
• Adjustment positions: 3 sets of mounting holes
• Positioning increments: 20mm (¾”)
• Accessory clearance: Underside and side clearance slots for M-LOK accessories

Warranty

2 years. MDT states a two-year warranty for this product, matching the stated warranty period for the accessory.

In the Box

• 4 interior forend weights
• Four #10-24 x ½” Flat Head Cap Screws per weight for fastening to the chassis