IDK what carrier tilt is/means,but I can see the buffer tube dings.
And what does that have to do with a piston AR ? Us Yankees can understand the text of an OP :lol:Di vs Piston
Before making a decision maybe it would be good to know just how much an M4 can take and remember if you have an AR-15 16" barrel you are probably going to be shooting it semi-auto.
LiveLeak.com - Torture-Test of Colt M4 - Fired Full Auto Until it Catches Fire