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View Full Version : AR15 & M16 bolts are different?


TreeHugger
04-20-2012, 10:50 AM
Is the bolt different between the AR15 & M16? Cause Young Manufacturing said they have two different types & Fulton Armory said that both use the same bolt. Unless Young got confused with the carrier.

a308garand
04-20-2012, 11:04 AM
Standard bolt for the M16 is the same as the AR15. There can be a vast difference in the quality of construction from low to high end makers.


There are some makers who have tweaked the construction of their bolt to "enhance" the performance, but they mostly still fit either M16 or AR15.

Stick with the standard bolt and you would be fine.

Of course there are many types of bolt carriers. Auto, Semi-auto and such. Some of which will not fit some guns,,,ie Colt receiver with a block will not run an auto carrier.

motorwerks
04-20-2012, 11:14 AM
That's only partly true. M16 Bolt carriers are different, but useable in Semi auto.

Read here for the differences. The bolts them selves are from what I can tell the same though.

http://www.ar15.com/content/legal/AR15-M16Parts/

JDW67
04-20-2012, 11:22 AM
I think they got confused about the carrier.

TreeHugger
04-20-2012, 11:24 AM
I called Y/M again just to confirm, I specifically asked about the bolt and not the carrier, they said that the length of the bolt is different. Just like the above 2 posters, I also believe that the only difference should be the carrier(I'm now truly confused). I'm on hold right now to double check with Larue.

a308garand
04-20-2012, 11:50 AM
You can get a standard bolt from LMT for $65 or get the enhanced bolt for $155.
http://www.lmtstore.com/bolts-carriers-groups/bolts-carriers-and-groups-complete/556-enhanced-bolt-assembly.html

The information about the bolts being different lengths is weird :facepalm:

Just get a bolt from Bravo Company, Colt, Daniel Defense, LMT or LaRue.

TreeHugger
04-20-2012, 6:08 PM
You can get a standard bolt from LMT for $65 or get the enhanced bolt for $155.
http://www.lmtstore.com/bolts-carriers-groups/bolts-carriers-and-groups-complete/556-enhanced-bolt-assembly.html

The information about the bolts being different lengths is weird :facepalm:

Just get a bolt from Bravo Company, Colt, Daniel Defense, LMT or LaRue.

Already checked

Out of stock
LMT (6 wks)
BCM (n/a)
Daniel Defense (indefinite, they are keeping them for their full weapon build for now)
DPMS (12 wks - would be one of my last desperate choice)
Young Manufacturing
Laure (they only sell a black BCG, which I believe is from Y/M, I only want the bolt assembly, preferably chrome)

In stock:
Fulton Armory (black phosphate $55 - $60)

Have not checked JP yet.

Y/M state that there is a difference. Larue state that there is a difference, it's just that the M16 version is harder to find, but a semi with an M16 carrier can use either one.