Nordic MXT Browning BPS/A-5 12 Ga Extension Nut Nordic MXT Browning BPS/A-5 12 Ga Extension Nut $32.99 SKU: NORNUTBP1200 In Stock Only 11 left! Quantity -+California Proposition 65 Warning Add to Cart Details MXT extension tube nut for Browning BPS and the OLD Auto-5. This nut will replace your factory magazine cap and allow installation of an ... DetailsBackDetailsMXT extension tube nut for Browning BPS and the OLD Auto-5. This nut will replace your factory magazine cap and allow installation of an MXT shotgun extension tube.NOTE: For the new inertia-operated Browning A5, see the Browning A5 Nut.See MoreSee Less Reviews Back Ratings & ReviewsNo reviews availableBe the first to Write a Review