10-07-2014, 02:57 PM
You are having short stroke issues. In addition to checking the gas block alignment and possible gas port obstruction, check that your carrier key is not loose. This can be very difficult to see, so look and feel very closely.
Take another bolt carrier, and see if the same thing happens. Load only one cartridge, with the magazine, and see if it locks back on firing.
Take another bolt carrier, and see if the same thing happens. Load only one cartridge, with the magazine, and see if it locks back on firing.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com