+3 BRT Gas Block Pins ( 3 pcs ) GB-PINSx3 $4.95 In stock Quantity: 1 Add to Bag Product Details Replacement coil pins used to install a spiral coil pin in BRT MicroPin Gas Blocks. Pinning of the gas block is a must to ensure reliability for any serious use carbine. A drill press is recommended to drill the pin hole. A roll pin starter punch, roll pin punch and hammer are recommended to drive the pin. The replacement pack includes Qty. (3) stainless steel spiral coil pins. Save this product for later Favorite