The 'Regulator' Since 1999 - Bullet Guitar Strap - Model # GST22301 Regulator Bullet Guitar strap. Our supreme black leather 2-1/2 inch wide , double thick stitched straps are custom made for us at a leather shop in St. Louis. Actual M27 machine gun links permanently attach 37ea BRASS SHELLS with COPPER FMJ TIPS. - The leather is fully adjustable up to 52" if you need a longer strap we have extensions that will increase the maximum length to 63" - Completely INERT - 2 lbs -