Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Site Notices
1/25/2018 7:38:29 AM
Posted: 10/4/2002 2:47:07 PM EST
What are bushmaster ar's actually chambered for? 5.56 NATO or 223.rem?
Link Posted: 10/4/2002 3:47:08 PM EST
5.56N is not a chamber specification - it's a cartridge specification.

Each military weapon which uses the 5.56N round has a chamber specification which usually differs from the official SAAMI .223Rem chamber specification, with wider headspace tolerance, longer FIELD reject, and a longer leade in the chamber throat. The M16 chamber will differ from the M249 chamber, for instance - and neither is a SAAMI .223 Rem spec chamber.

Bushmaster barrels are chambered to the M16 specification, except match barrels, which get a minimum SAAMI spec chamber.
Top Top