Hello---okay, got a new M4A1, that wants to only fire in Semi Auto. When I flip to AUTO, the first shell ejects,and the 2nd cartridge is fed perfectly into the chamber, but does not fire. I take the mag out, pop the upper receiver, and see that the hammer is still up. Any idea on what the problem is? i think it is the auto sear...and ...ummm.. i took it out...but no sure howe to put it back in...any instructions on this? tiny pin, a spring, the sear, and the clip...just need to know how to reassemble correctly. i think it was originally put in wrong by the prev owner...
Mon Apr 08, 2013 7:14 pm