Cast vs Forged
olyarms.com/castorforged.html

Cast or Forged? How to tell?

The following threads are now in the Archives.
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Pro's and Con's of cast receivers (if any?)
http://ar15.com/forums/topic.html?b=3&f=118&t=178074
Pics of cast AR destruction
http://ar15.com/forums/topic.html?b=3&f=118&t=178675
Cast or Forged? How do I tell
http://ar15.com/forums/topic.html?b=3&f=12&t=169249
Cast lower Vs Forged Lower
http://ar15.com/forums/topic.html?b=3&f=118&t=164318
Cast vs Forged Lower
http://ar15.com/forums/topic.html?b=3&f=118&t=154551
What's Wrong with Cast Lower?
http://ar15.com/forums/topic.html?b=3&f=4&t=155506
What is "wrong" with cast lowers?
http://ar15.com/forums/topic.html?b=3&f=118&t=157324
Crushed a AR today
http://ar15.com/forums/topic.html?b=3&f=118&t=174501

Gas Port Sizes

The following threads are now in the Archives.
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21JUL03
http://ar15.com/forums/topic.html?b=3&f=66&t=165770
12AUG03
http://ar15.com/forums/topic.html?b=3&f=66&t=167464
Short barrel gas port diameter?
http://ar15.com/forums/topic.html?b=3&f=4&t=179044

Maker’s Marks
LOWER RECEIVER & MAG FLOORPLATE ROLLMARKS, LOGOS AND MARKINGS  

COLT BOLT AND CARRIER MARKINGS


The following threads are now in the Archives.
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Keyhole forging mark on upper receiver
http://ar15.com/forums/topic.html?b=3&f=12&t=178303
Please help me identify this {keyhole} upper receiver forging mark
http://ar15.com/forums/topic.html?b=3&f=118&t=178290
All AR15 Upper Receiver Markings Lists
http://ar15.com/forums/topic.html?b=3&f=118&t=172653
What markings are on your Colt Upper?
http://ar15.com/forums/topic.html?b=3&f=118&t=176964
Help me identify who manufactured this bolt. Colt?
http://ar15.com/forums/topic.html?b=3&f=12&t=199422
RRA Upper inside finish peeling off
http://ar15.com/forums/topic.html?b=3&f=118&t=203996

Big Problems

busted bolt
cracked DPMS lower

The following threads are now in the Archives.
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Jag in bore
http://ar15.com/forums/topic.html?b=3&f=66&t=166533
bolt cracked
http://ar15.com/forums/topic.html?b=3&f=66&t=165000
broken bolt
http://ar15.com/forums/topic.html?b=3&f=66&t=160279
broken lowers
http://ar15.com/forums/topic.html?b=3&f=66&t=171523
.223 in a 7.62X39 chamber
http://ar15.com/forums/topic.html?b=3&f=66&t=178336
Gas Key Jammed With Metallic {primer} Debris
http://ar15.com/forums/topic.html?b=3&f=66&t=178488
Possible Reasons for Case Head to Blow Out in M16
http://ar15.com/forums/topic.html?b=3&f=14&t=168604

kBs

The following threads are now in the Archives.
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23JUN03
http://ar15.com/forums/topic.html?b=3&f=66&t=163405
12AUG03
http://ar15.com/forums/topic.html?b=3&f=66&t=167477
5AUG03
http://ar15.com/forums/topic.html?b=3&f=66&t=166949
26JUL03
http://ar15.com/forums/topic.html?b=3&f=66&t=166192
3SEP03
http://ar15.com/forums/topic.html?b=3&f=4&t=166820
Bushmaster kB with Igman SS109
http://ar15.com/forums/topic.html?b=3&f=118&t=171710
13MAR05
http://ar15.com/forums/topic.html?b=3&f=66&t=228656
AR-15 failure
http://ar15.com/forums/topic.html?b=3&f=118&t=231951