View Single Post
Old April 4, 2010, 06:23 PM   #20
HiBC
Senior Member
 
Join Date: November 13, 2006
Posts: 3,710
I do not know the topic extremely well,but there is an M-4 ramp,and there is the standard AR ramp.The M-4 ramp is cut a bit deeper and the bbl extension cuts should blend with it.I cannot tell if you have a problem.If it is incorrect,contact whoever built your upper.IMO,charging in with a dremel is usually ill advised.That black anodize is a wear resistant hard coat.The aluminum under it is pretty soft.
An engine builder might "massage" a piston.Breaking all sharp edges,etc.This sort of fine hand work can be done by a man building his own rifle.It is not likely in production.You do not have access with an assembled upper reciever,If you had only a bbl and bbl extension,you could lightly break all sharp corners,draw stone and lightly polish the ramps,etc,and that would be sweet.I also think 99.9% of the production of AR type rifles have not had this done,and they work.
Another grim possibility,you say you saved a lot of money gathering parts and assembling this rifle.Cool,I assemble mine,too,but I cannot say I save money as I buy what I consider quality over cost.It may be possible that a bargain reciever is not quite Mil-Spec.(And maybe you have top quality stuff so it isn't the problem)
Of course,the bent round would impede bolt closing and feeding.
HiBC is offline  
 
Page generated in 0.04888 seconds with 7 queries