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Posted: 6/16/2009 2:17:54 PM EST
Bushmaster bolt, does this look wrong??? Very slight rough feeling.




Link Posted: 6/16/2009 2:18:50 PM EST
I don't like unshrouded firing pins, so that in itself looks weird...
Link Posted: 6/16/2009 2:19:31 PM EST
Tooling mark, maybe
Link Posted: 6/16/2009 2:24:18 PM EST
Focus.
Link Posted: 6/16/2009 2:25:16 PM EST

Originally Posted By kcolg30:
Tooling mark, maybe

Definitely.
Link Posted: 6/16/2009 2:25:59 PM EST
I had that on our M16A3 bolts when I was an armorer.

Normal.
Link Posted: 6/16/2009 2:28:34 PM EST
Whoa! That endmill had more chatter than a terrorist cell.

That would go back with a "Are your QC people frigging blind?" note.
Link Posted: 6/16/2009 2:33:41 PM EST
Tooling marks, In woodworking they are called mill marks but the principle is the same. They are cased by the rotating cutter scooping out the material as the workpiece passes by it. Those are unusually deep.
They must have increased the feed speed to crank out the quantity during the high demand, at the cost of a fine finish.
In cross section, they resemble ocean waves as a kid would draw them.
Link Posted: 6/16/2009 2:37:12 PM EST
It's from a Bushmaster XM15 E2S, an older post ban gun, shouldn't have been cranked out I wouldn't think. This going to cause me trouble in the future? Aside from the unshrouded firing pin and probably improperly staked gas key, etc, etc.
Link Posted: 6/16/2009 2:39:57 PM EST
Originally Posted By Bullets1st:
It's from a Bushmaster XM15 E2S, an older post ban gun, shouldn't have been cranked out I wouldn't think. This going to cause me trouble in the future? Aside from the unshrouded firing pin and probably improperly staked gas key, etc, etc.


No.

Link Posted: 6/16/2009 2:40:14 PM EST
What is wrong with an unshrouded firing pin? one of my parts gun AR-15's has that.
Link Posted: 6/16/2009 2:50:49 PM EST
Originally Posted By fettesbrotde:
Originally Posted By Bullets1st:
It's from a Bushmaster XM15 E2S, an older post ban gun, shouldn't have been cranked out I wouldn't think. This going to cause me trouble in the future? Aside from the unshrouded firing pin and probably improperly staked gas key, etc, etc.


No.



This.
Link Posted: 6/16/2009 2:53:01 PM EST
Originally Posted By batmanacw:
Originally Posted By fettesbrotde:
Originally Posted By Bullets1st:
It's from a Bushmaster XM15 E2S, an older post ban gun, shouldn't have been cranked out I wouldn't think. This going to cause me trouble in the future? Aside from the unshrouded firing pin and probably improperly staked gas key, etc, etc.


No.



This.


I'd say the same.
Link Posted: 6/16/2009 2:53:05 PM EST

Originally Posted By para_frame:
What is wrong with an unshrouded firing pin? one of my parts gun AR-15's has that.


Causes the hammer to catch on the firing pin which can damage firing pin retaining pin.
Link Posted: 6/16/2009 2:53:32 PM EST
Originally Posted By Sub-MOA:
Whoa! That endmill had more chatter than a terrorist cell.

That would go back with a "Are your QC people frigging blind?" note.


I LOL'ed. To me it looks ...
Link Posted: 6/16/2009 2:53:51 PM EST
it's a bushmaster, the entire gun is a festering pile of shit
Link Posted: 6/16/2009 2:56:55 PM EST
looks like they need to change the bit on there milling machine. send it back for some buffing.
Link Posted: 6/16/2009 2:58:17 PM EST

Originally Posted By mayoroscarmayer:
it's a bushmaster, the entire gun is a festering pile of shit


Yeah yeah yeah..... Some kid had it for sale for 700 with 10 mags and less than 50 rounds through it. Actually looked like it had never been fired.

Hope it doesn't pull a Glock on me!


BOOM!!!!!!!!!!!!!!!!!!!
Link Posted: 6/16/2009 2:58:29 PM EST
Originally Posted By fettesbrotde:
Originally Posted By Bullets1st:
It's from a Bushmaster XM15 E2S, an older post ban gun, shouldn't have been cranked out I wouldn't think. This going to cause me trouble in the future? Aside from the unshrouded firing pin and probably improperly staked gas key, etc, etc.


No.



My years of machinig experience and firearms knowledge concur with this assessment.
Link Posted: 6/16/2009 2:59:30 PM EST
Originally Posted By mcg3686:
looks like they need to change the bit on there milling machine. send it back for some buffing.


Don't listen to this man.

Those chatter marks won't affect the reliability of your rifle.
Link Posted: 6/16/2009 3:01:53 PM EST

Originally Posted By Cypher214:
Originally Posted By mcg3686:
looks like they need to change the bit on there milling machine. send it back for some buffing.


Don't listen to this man.

Those chatter marks won't affect the reliability of your rifle.

Maybe Bushy designed them as pre-emptive wear turds!?!?!?!

Link Posted: 6/16/2009 3:02:34 PM EST
I'm not a gunsmith nor expert, but I can say the pic. of yours does not look like mine bro.
Link Posted: 6/16/2009 3:04:12 PM EST

Originally Posted By hoodwink:
I'm not a gunsmith nor expert, but I can say the pic. of yours does not look like mine bro.


Dude, don't be jealous cause yours doesnt have flavor!
Link Posted: 6/16/2009 3:04:13 PM EST
I love it when people post out of focus photos.
Link Posted: 6/16/2009 3:05:19 PM EST

Originally Posted By SparticleBrane:
I love it when people post out of focus photos.


I love it when people over use the googly eyed smiley.
Link Posted: 6/16/2009 5:07:33 PM EST
Originally Posted By Bullets1st:

Originally Posted By SparticleBrane:
I love it when people post out of focus photos.


I love it when people over use the googly eyed smiley.


Link Posted: 6/16/2009 5:11:55 PM EST

Originally Posted By killingmachine123:

Originally Posted By kcolg30:
Tooling mark, maybe

Definitely.
Friction Enhancing Grooves. TM

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