A prime example of our Aim To Be Different mantra is our patented Radial Delayed Blowback system. The Radial Delayed Blowback system paved the way for larger caliber PCCs in an AR platform. Radial Delayed Blowback allows reliable operation without a heavy bolt, buffer or spring. The mechanical delay allows pressure to fall in the chamber before it unlocks.The system means less recoil, increased accuracy, and better velocity when using a suppressor. We started with .45 ACP and additionally, we offer 10mm, .40 S&W, 5.7x28mm and 9mm in our BANSHEE line.