When I built my rifle, I had a 14.5 Model 1 chrome molly barrel on it .
Specs: M4gery
14.5 Model 1 chrome molly barrel
ammo used: ArmsCorporation (of the Phil. / NOT A.R.M.S.) 5.56 ball ammo
[Gun was "brand new" (newly assembled, so no grime or dirt yet). never been fired. bolt just lightly oiled (then wiped down) to avoid too much friction on new upper.]
When a friend and I took it to the range to fire, the rifle jammed almost immediately. We were barely shooting 20 rounds out of it (not rapid fire, not FA) when a bullet got stuck in the barrel.
I knew there was something wrong when I felt / heard (hope that makes sense) the rifle not feed properly. Upon visual check, we saw that the bolt did not seat properly or was not all the way in.
So no problem I thought to myself..... Maybe a weak buffer spring .... tap the forward assist...and I will be good to go. NOPE! It was too darn tight! It would not budge! Pull the charging handle and still it would not budge! It was really stuck!
We had to remove the upper from the lower, to be extra safe, rest and press on the upper on a tire, point it downrange, and started puling the charging handle with all the strenth i could! You could imagine how sore my fingers got.
When the bullet finally popped out, we could not see any apparent deformities on the bullet. WT??? We checked the bolt, the upper and the barrel and they were free of any dirt or grime! Just to test our theory of "bad ammo" we loaded it with WCC 5.56 military ammo and tried it out. After 5 to 10 rounds. Same problem.
When I narrated this problem to another friend, he said he too experienced the same problems with his 14.5 Model 1 barrel. He returned his to his dealer.
Any ideas??? Is this a common problem for Model 1 barrels?
Just for my education. I have since given up my Model 1 barrel for DPMS. No problems anymore with whatever ammo i feed it.