S&W 15-22 Magazine Adapter (Clip on)$7.50
The AR Catch22 clip-on magazine shim can clip right onto your lower for a quick and easy way to shim the magazine and take up the slack in the mag well. The clip is easy to install and remove and it allows you to use your standard 15-22 magazines in your AR without any modification.
With the 15-22 magazine adapters, the S&W 15-22 magazine will work great with the Catch22 to provide true last-round-hold-open functionality.
If you are using a Kriss Defiance DMK22 which already comes with a bolt catch, you can use these adapters to use the 15-22 magazines instead of the Kriss magazines. This can be helpful as the 15-22 magazines are more consistent for bolt-hold-open and they come in higher capacity than the Kriss magazines.
One adapter is needed per lower.
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