AR15.Com Archives
 Extruding .22 Barrel Length on AR Platform?
buckjay  [Team Member]
4/28/2012 2:39:22 PM
I understand the .22 barrels are set further back into the receiver then a traditional AR15 5.56/.223 barrel so I'm trying to figure out how much further back for the purpose of deciding on a rail.

Any ideas?



shadowcop  [Team Member]
4/28/2012 2:40:49 PM
About 1.25"
Redtazdog has a guide on rails and barrel lengths
Dave N
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The muzzle threads will be at the end of a hand guard with

5.5" barrel and a 4.25 hand guard
8.25" barrel and a 7" hand guard
10.25" barrel and a 9" hand guard
13.25" barrel and a 12" hand guard

add .500 for exposed threads ouside of the hand guard if needed.

Some hand guards are .25 to .50 longer, add barrel length to get the look you like.
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From Redtazdog:

For a 5" suppressor to be exposed aprox 1" outside of a hand guard you will need.

4.5" barrel and a 7' hand guard
6.5" barrel and a 9" hand guard
9.5" barrel and a 12" hand guard

Some hand guards are .25 to .50 longer, add barrel length to match if needed.
Redtazdog  [Team Member]
4/28/2012 5:09:03 PM
With pictures too
http://www.ar15.com/forums/t_3_15/556791_Dedicated_22_hand_guard_with_SBR_and_Pistol_barrel_length_for_the_look_you_want.html
buckjay  [Team Member]
4/28/2012 5:55:44 PM
Excellent, thanks for the response fellas!