Accessories are not regulated by the ATF. They can be ordered here with the firearms when shipped to your designated FFL or can be ordered sepearately at a later date and shipped directly to the buyer.

Thread Protector
Electroless nickel plated stainless steel thread protector prevents damage to the standard military 5/8 x 24 threaded muzzle.

Strike Bezel
Electroless nickel plated stainless steel bezel striking tool designed to collect DNA from an attacker for later forensic identification.
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Barrel Extension
Electroless nickel plated stainless steel extension designed to increase leverage when closing the action. Also, inexperienced shooters should install the extension until they are comfortable and proficient in muzzle control.

Picatinny Rail
Electroless nickel plated stainless steel rail intended for mounting aftermarket laser designators and illuminators.
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KeyMod Picatinny Rail
Matte black anodized aluminum custom configured to accept a Harris bipod on the forward underside of the Palm Carbine® forearm rail.