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- Enables the addition of an aftermarket arm brace or other pistol buffer tube accessory
- Adapter is made of 6061 T6 aluminum, flat black anodized
If using a carbine style castle nut buffer tube there are two threaded alignment holes (10x32 thread) for tubes that use a notch for indexing. A 3/16 half dog socket set screw would be used for proper indexing.