Matt, in this episode of The Gun Corner, talks about the offering of BOLT Airsoft in their airsoft guns, the BRSS which is a blowback and recoil feature... "BOLT Airsoft brings the realism of recoil feedback to the AEG market through their patent pending Bolt Recoil Shock System (BRSS for short). The BRSS design provides an extremely authentic kick providing the user with extremely realistic feedback. The BRSS design rivals many Gas Blowback rifles currently available."

Check the BOLT Recoil BlowBack M4 Series at Evike.com.