Collection: Stock Adapters & Kits
Stock adapters and kits for shotguns let you change how your firearm fits, feels, and performs. Whether you're switching to a pistol grip, adjustable stock, or a more tactical setup, the right adapter makes that transition solid and reliable.
These upgrades aren’t just about looks — they affect control, comfort, and how well you can run the gun. A poorly made adapter leads to looseness, bad alignment, and long-term issues.
We carry shotgun stock adapters and conversion kits that lock up tight and hold under real use, so your setup performs the way it should.
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Stoeger M3K Stock Adapter for Magpul SGA stock
Regular price $80.00 USDRegular price -
MKII Turkish Shotgun Stock Adaptor Plate by S&J Hardware
Regular price $80.00 USDRegular price -
Beretta 1301 Stock Adapter by S&J Hardware
Regular price $50.00 USDRegular price$75.00 USDSale price $50.00 USDSale
A stock adapter converts your shotgun's receiver to accept a different stock mounting system — most commonly an AR-style buffer tube, which opens up the full range of adjustable and folding stocks designed for the AR platform. This is one of the most practical modifications for shooters who want a length-of-pull that actually fits, or who need to store the shotgun in a compact space. The adapter must fit the receiver precisely — any play or looseness transfers directly to the stock and affects how the gun handles under recoil. We carry stock adapters and conversion kits for the most common shotgun platforms, selected for rigid fitment and real-world durability.
FAQ
What does a stock adapter do?
A stock adapter replaces your shotgun's factory stock and converts the receiver to accept a different mounting system. The most common conversion attaches an AR-style buffer tube stub to the receiver, which allows you to mount any AR-compatible adjustable, folding, or fixed stock. This gives you access to a much wider range of stock options than the factory setup.
Will a stock adapter affect how my shotgun functions?
A properly fitted stock adapter should not affect cycling, feeding, or any other function. The stock does not interact with the action on most shotgun platforms. The key is that the adapter fits the receiver without any play — looseness causes stock wobble that affects your sight picture and point of impact consistency.
Are stock adapters platform-specific?
Yes. Adapters are designed to fit a specific receiver. A Remington 870 adapter will not fit a Mossberg 500, and adapters are often specific to the exact model and configuration within a platform family. Always confirm the adapter is listed for your specific shotgun before ordering.
Can I legally add a pistol grip and no stock to my shotgun?
This depends on your jurisdiction and the configuration. In the US, a shotgun with a pistol grip and no shoulder stock that falls under certain overall length or barrel length thresholds may be classified as an AOW or SBS under the NFA, requiring a tax stamp. Check your state laws and federal law before building a pistol-grip-only configuration on a registered shotgun.