dmftoy1
Member
My buddy and I were out initiating his new 100 yard range yesterday and about 50-60 rounds into our shooting his AR's trigger "locked". It was right after a FTF. The rifle is one of those new bushy varmiteer's. (24-inch fluted barrel, flattop, NM 2-stage trigger).
Anyway, we couldn't figure out what was wrong so we popped the upper off and did a visual inspection and still couldn't see anything at all wrong. One thing I did notice was that even with the hammer cocked the safety couldn't be applied. This Bushy 2-stage trigger has 2 set screws installed into the safety, so I thought maybe one of the screws had moved or ?
Being very careful to count the number of turns I "tightened" the only one that I had an allen wrench for. (the other was so small that even my extensive allen wrench set couldn't fit it . . ??) After 1 complete revolution of the set screw the trigger started to move but was only a "1-stage" (if that makes sense) I told him that I'd probably send it back to bushy as it was under warranty but he was reluctant to do that so we took it back to my workshop. After blasting it with compressed air and putting a very bright light on it we found that a primer was wedged in behind the safety and appeared to blocking the trigger movement. It took about 10 minutes with a dental pick but I finally got it fished out. We went through the empty brass and found one case without a primer. (Federal XM193 - LC04).
So now for a few questions:
How common is something like this? I thought that the reason military ammo used crimped in primers was to avoid this type of thing?
Is a 2 stage NM trigger more susceptible to something like this because of the overtravel adjustment screws or ?
How in the heck do you remove a bushy safety on one of these things? If I could've taken out the one setscrew that sticks way the heck up (say 1/4-3/8's of an inch out of the safety) then it would've come out like a standard safety, but I can't find any allen wrench that would fit this thing. (I've got wrenches down to .050)
Thanks for listening!
Have a good one,
Dave
Anyway, we couldn't figure out what was wrong so we popped the upper off and did a visual inspection and still couldn't see anything at all wrong. One thing I did notice was that even with the hammer cocked the safety couldn't be applied. This Bushy 2-stage trigger has 2 set screws installed into the safety, so I thought maybe one of the screws had moved or ?
Being very careful to count the number of turns I "tightened" the only one that I had an allen wrench for. (the other was so small that even my extensive allen wrench set couldn't fit it . . ??) After 1 complete revolution of the set screw the trigger started to move but was only a "1-stage" (if that makes sense) I told him that I'd probably send it back to bushy as it was under warranty but he was reluctant to do that so we took it back to my workshop. After blasting it with compressed air and putting a very bright light on it we found that a primer was wedged in behind the safety and appeared to blocking the trigger movement. It took about 10 minutes with a dental pick but I finally got it fished out. We went through the empty brass and found one case without a primer. (Federal XM193 - LC04).
So now for a few questions:
How common is something like this? I thought that the reason military ammo used crimped in primers was to avoid this type of thing?
Is a 2 stage NM trigger more susceptible to something like this because of the overtravel adjustment screws or ?
How in the heck do you remove a bushy safety on one of these things? If I could've taken out the one setscrew that sticks way the heck up (say 1/4-3/8's of an inch out of the safety) then it would've come out like a standard safety, but I can't find any allen wrench that would fit this thing. (I've got wrenches down to .050)
Thanks for listening!
Have a good one,
Dave