SO, Was at the range yesterday with my son shooting my Retro AR build
This is an M16 Parts kit less Barrel and Receiver.
Incident:
Shooting offhand at 100 yards, sometime around round 5/10 I had a double fire. Pulled trigger once and 2 rounds went off one after the other. Stopped and saw a stove pipe. Cleared the stove pipe, nex round was not fed and the bolt put a dent in the middle of the case. Pulled upper off of the lower and immediately thought the dis-connector was faulty. I"ve had that happen before on a Delton Stock trigger which is what is in it. But I had swapped out the out of spec part and previously had about 400 rounds on this trigger group. It held after every pull back of the hammer and clicked and held when releasing trigger. I then ran 1 round in the mag at a time holding trigger then letting go listening for the click. Did 3 rounds, then stopped after looking down and seeing the round that stove piped. I thought I saved the round but looked all over this morning and could not find it so I drew what I vividly recall after inspecting it. It appears that it was Out of Battery but I feel that it did not initially ignite OOB. Its as if it ignited then the bolt let loose before the gas pushed it back. The reason I think that is a) Case did not rupture b) primer is slighty bulged out and the back end of the case is bulged so it was not fully locked before the pressure in the case came down c) I don't see any obvious damage to the gun and don't recall any puff or pressure releasing out the receiver (although some may have). I have YET to fully pull the AR apart and look at the bolt but figured I'd post this so I know some things to look at and people can monday morning quarterback this. I know already that a PROPERLY FUNCTIONING IN SPEC AR should NOT slam fire unless the bolt is closed. But this is an original Colt M16 parts kit so my thought are I need to step back an inspect what put together in this kit before going any further.
These are reloads I built about 3+ years ago.
Additional thoughts are did I have a high primer? I know there are arguments that a high primer can set off as well as arguments through tests that it can't.
Some thoughts I had before ripping it apart after sending post is:
high primer?
deformed primer?
sensitive primer (yes, I know, all rounds get an initial dent on the primer from closing the bolt on an AR)
Out of spec bolt parts (lugs, pin, pin slot allowing wiggle?)
out of spec Barrel (barrel is new)
combinations of above.
Things I plan to look at:
Bolt face
Bolt Lugs
Bolt Pin
Firing Pin
Lube I had on it
re inspect my 223 reloads (undisclosed amount) and mark the ones I have re inspected.
This is an M16 Parts kit less Barrel and Receiver.
Incident:
Shooting offhand at 100 yards, sometime around round 5/10 I had a double fire. Pulled trigger once and 2 rounds went off one after the other. Stopped and saw a stove pipe. Cleared the stove pipe, nex round was not fed and the bolt put a dent in the middle of the case. Pulled upper off of the lower and immediately thought the dis-connector was faulty. I"ve had that happen before on a Delton Stock trigger which is what is in it. But I had swapped out the out of spec part and previously had about 400 rounds on this trigger group. It held after every pull back of the hammer and clicked and held when releasing trigger. I then ran 1 round in the mag at a time holding trigger then letting go listening for the click. Did 3 rounds, then stopped after looking down and seeing the round that stove piped. I thought I saved the round but looked all over this morning and could not find it so I drew what I vividly recall after inspecting it. It appears that it was Out of Battery but I feel that it did not initially ignite OOB. Its as if it ignited then the bolt let loose before the gas pushed it back. The reason I think that is a) Case did not rupture b) primer is slighty bulged out and the back end of the case is bulged so it was not fully locked before the pressure in the case came down c) I don't see any obvious damage to the gun and don't recall any puff or pressure releasing out the receiver (although some may have). I have YET to fully pull the AR apart and look at the bolt but figured I'd post this so I know some things to look at and people can monday morning quarterback this. I know already that a PROPERLY FUNCTIONING IN SPEC AR should NOT slam fire unless the bolt is closed. But this is an original Colt M16 parts kit so my thought are I need to step back an inspect what put together in this kit before going any further.
These are reloads I built about 3+ years ago.
Additional thoughts are did I have a high primer? I know there are arguments that a high primer can set off as well as arguments through tests that it can't.
Some thoughts I had before ripping it apart after sending post is:
high primer?
deformed primer?
sensitive primer (yes, I know, all rounds get an initial dent on the primer from closing the bolt on an AR)
Out of spec bolt parts (lugs, pin, pin slot allowing wiggle?)
out of spec Barrel (barrel is new)
combinations of above.
Things I plan to look at:
Bolt face
Bolt Lugs
Bolt Pin
Firing Pin
Lube I had on it
re inspect my 223 reloads (undisclosed amount) and mark the ones I have re inspected.