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Safeer, Buds has some accessories here : https://www.budsgunshop.com/search.php/type/accessories/q/kriss+vector ------------------- Kriss Vector says : The Vector's barrel is riveted into the receiver and is not user-serviceable. The ability to change an existing Vector receiver's caliber is not and has never been a feature of the Vector platform. Cheers and stay safe! -------------- This is under Kriss Vector FAQ's here : https://kriss-usa.com/support/faq/

Safeer, I'd contact the manufacturer at +1 (855) 574 7787 or email them at ( info@kriss-usa.com ) for a definite answer. Hope this helps.