Out of stock
SKU: E01630
UPC: 082442875347
MPN: E01630
The Beretta Stock Drop Adjustment Kit delivers precise stock fitting for semi-automatic shotguns including the A300, A400, and other compatible models. Designed by Beretta as part of their B-Fast adjustment system, this kit allows shooters to dial in cast, drop, and pitch to match individual mounting preferences and shooting styles. Whether you're correcting for a high cheekbone, adjusting for optics mounting, or simply seeking a more natural point of aim, this kit provides the adjustment range needed to transform your shotgun into a properly fitted tool rather than a compromise.
Beretta engineered this adjustment system with generous range specifications: up to 11mm of height adjustment parallel to the towers axis, a maximum 6-inch drop adjustment, 11-degree rotation capability perpendicular to the stock drop axis, and 13mm of lateral adjustment for cast-on or cast-off positioning. The kit utilizes upgraded locking screws that seat precisely against the stock towers, preventing any shift or loosening during recoil. This mechanical simplicity means adjustments can be made at the range with basic tools, allowing shooters to test different configurations without gunsmith visits. The shim system works by changing the angle between the receiver and stock, directly affecting where your eye naturally aligns with the rib and front bead.
Proper stock fit separates consistent shooters from those chasing their patterns. If you're mounting your A300 Outlander and finding yourself lifting your head to see the bead, or if your patterns print consistently high or left, this adjustment kit addresses the root cause. Competitive clay shooters use these shims to match gun fit to their specific stance and mount. Hunters benefit from adjustments that account for heavy clothing or different shooting positions. Pair this kit with other parts and accessories from our shotgun inventory to build a complete setup tailored to your needs.
This kit fits Beretta semi-automatic shotguns including the A300 series, A400 series, and earlier models like the 390, 391, and 3901. The adjustment system uses the same tower mounting design across these platforms, making the shims interchangeable between compatible models.
Mount your unloaded shotgun naturally with eyes closed, then open them to see where your eye aligns relative to the rib. If you see too much rib, you need more drop. If the bead disappears below the rib plane, reduce drop. Cast adjustments follow similar logic for left-right alignment with the rib.
Yes. Installation requires removing the stock, selecting the appropriate shim combination, and reassembling. The locking screws included provide secure mounting. Most shooters complete the process in under 30 minutes with standard tools and can make further adjustments at the range.
The kit provides up to 11mm of height adjustment, 6 inches of drop adjustment, 11 degrees of rotation relative to the stock drop axis, and 13mm of lateral cast adjustment. This range accommodates most shooter builds and mounting preferences.
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