M4 barrel in standard receiver, accuracy?

trespass · May 27, 2012, 09:06 AM

do the M4 feed ramps in barrel chamber affect front sight height
installed in a non-ramped, standard upper receiver? If so, is it
a significant amount?

thanks.

eldorendo · May 27, 2012, 04:26 PM

The feed ramps have absolutely nothing to do with p.o.i., unless they mitigate bullet striations during feeding, then you'd be talking about groups, not p.o.i.

dcobler · June 9, 2012, 01:33 AM

Found this a while back when I was wondering about M4 feed ramps and it cleared things up for me.
http://www.ar15.com/archive/topic.ht...f=118&t=511200

dcobler · June 9, 2012, 01:35 AM

The only problem you would really run into is if your receiver is cut for M4 feed ramps and your barrel extension isn't. Then you could experience jams or marring to your bullets during feeding.

May 27, 2012, 09:06 AM	#1
trespass Senior Member Join Date: October 20, 2004 Location: oklahoma Posts: 342	M4 barrel in standard receiver, accuracy? do the M4 feed ramps in barrel chamber affect front sight height installed in a non-ramped, standard upper receiver? If so, is it a significant amount? thanks.

June 9, 2012, 01:33 AM	#3
dcobler Senior Member Join Date: December 30, 2008 Location: Oklahoma, America Posts: 286	Found this a while back when I was wondering about M4 feed ramps and it cleared things up for me. http://www.ar15.com/archive/topic.ht...f=118&t=511200 __________________ "Be kind, be courteous, and have a plan to kill everybody you meet."

June 9, 2012, 01:35 AM	#4
dcobler Senior Member Join Date: December 30, 2008 Location: Oklahoma, America Posts: 286	The only problem you would really run into is if your receiver is cut for M4 feed ramps and your barrel extension isn't. Then you could experience jams or marring to your bullets during feeding. __________________ "Be kind, be courteous, and have a plan to kill everybody you meet."

May 27, 2012, 04:26 PM	#2
eldorendo Senior Member Join Date: May 8, 2012 Posts: 239	The feed ramps have absolutely nothing to do with p.o.i., unless they mitigate bullet striations during feeding, then you'd be talking about groups, not p.o.i.