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Q&A · Hunting

Can You Modify a Carbon Fiber Stock for Better Fit?

April 5, 2026

Quick Answer

Yes, a carbon fiber stock can be modified for a better fit, and the process typically involves making adjustments to the stock's length, comb, and drop.

Measuring and Marking the Stock

To modify a carbon fiber stock, start by measuring the shooter’s shoulder height and arm length to determine the ideal stock length. Use a marking tool to mark the desired length on the stock, taking care to align the marks with the stock’s existing features, such as the inletting and pistol grip. Consider using a jigsaw or bandsaw to make precise cuts, and sand the area to smooth out any rough edges.

Fitting the Stock to the Receiver

When modifying the stock’s length, you’ll also need to adjust the inletting to match the new length. Use a drill press and a specialized reamer to enlarge the inletting, taking care to maintain the stock’s original shape and fit. If necessary, use a combination of epoxy and fiberglass to reinforce the area and prevent further damage. For drop and comb adjustments, use a combination of shims and screws to fine-tune the stock’s fit to the receiver. Aim for a drop of 0.050 to 0.100 inches and a comb height of 0.150 to 0.250 inches to ensure a comfortable shooting position.

Final Assembly and Testing

Once the modifications are complete, reassemble the rifle and test the stock’s fit using a laser or optical sight. Pay attention to any deviations in the stock’s shape or fit, making adjustments as needed to achieve a consistent point of aim. Consider consulting with a professional gunsmith or using specialized tools to ensure the stock is properly fitted and aligned.

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