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9/19/2017 7:27:10 PM
Posted: 9/28/2003 2:35:37 PM EDT
I know this question has been beaten to death, but is there much difference between the 16 inch M-4 and 14.5 inch barrels as far as velocity and range? I am building an M-4 on a pre-ban Eagle carbine and am considering between the two barrel lengths..........thanks for any and all replies
Link Posted: 9/28/2003 4:32:41 PM EDT
The rule of thumb is 100fps loss per inch of barrel below 20". Thus there would be about a 150fps loss in velocity for a 14.5" from a 16". Unless your preban is already registered as a SBR, or you have a registered sear or link to put in there (ie. a legal full auto), I'd say stick with the 16". Unless its registered as an SBR or MG, you'll have to have at least a 16" overall length for the barrel and any other permenently attached muzzle devices. Go with a 14.5" barrel and you'll need to permanently affix either a muzzle brake or a flash supressor to get the 16" legal length. Might as well go with a 16" barrel for a little extra velocity.
Link Posted: 10/4/2003 6:41:07 AM EDT
At carbine distances 1.5" of barrel won't matter much. [url]http://www.bushmaster.com/faqnew/content_by_cat.asp?contentid=205&catid=103[/url] Choose your ammo carefully and enjoy. (go for the 14.5" w/perm attached Phantom)
Link Posted: 10/4/2003 12:26:05 PM EDT
Did you check the ammo FAQ? [url]http://www.ammo-oracle.com/#fragrange[/url]
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