-Buffer Tube Milling File (intended to shave down the very best of the AR-ten Buffer tube so the charging take care of can obvious on some higher/lower mixtures) I’ve engraved BRN-4 416 lowers to imitate the HK 416 logos. With adequate passes, a fiber laser can perform deep engraving as https://ghostgunsofficial.com/product-category/gg-purchase-product/