Has anyone seen this?, the operation uses the primer to unlock the bolt instead of using a gas piston. The operation would perform similar to a lever/roller delayed blowback firearm but possibly more hardwearing, reliable and would also allow a free floating barrel for accuracy on DMR platforms. Its possible the bolt would work in an existing M16 upper although the gas ports would have to be closed off.
Would it be possible to use this type of operation in an AR18 derivative?
http://www.google.com/patents/US7886470
Would it be possible to use this type of operation in an AR18 derivative?
http://www.google.com/patents/US7886470