Recent content by c172skyhawk2

just got around to measuring it. showed 14-16 pounds most of the way back

I have looked at the brass and it looks good. the only marks on it are on the neck and they line up with the locking lugs (or what ever the official name for them is) on the barrel

How could I check this easily? Take the gas tube and bolt carrier out and mait them together outside the gun and check fit?

Could any of yall measure how many pounds it takes to pull back the charging handle. I just wonder if my buffer spring is too strong. Just sitting here thinking and I have no ar's to compare to

Yes the bolt does hold the carrier when stood on the bolt face. It even takes some pressure to push it down. This is the only Ar bolt I have messed with but it moves freely (does not bind) and smoothly.

Getting failure to lock open on last shot, failure to strip the next round and feed it and sometimes a failure to eject the casing. Seems like the bolt is only coming about half way back. Rounds feed fine when actuating the bolt by hand.

not a stupid question. but yes it is all lubed up, lubed the bolt and bolt carrier good.

seems clean. i dont have a way to take care of the bends, but the ends are clean inside

Took off the gas block and measured. I get 1/16 inch, or .0625 on the gas port, no wiggle room. Just waiting to hear if this is in spec.

When it does eject the shells they are at my 4 o'clock or so and 5ish feet away. When i do shoot it and it does not eject the round I can hear the buffer spring, where as when it does eject the round I cannot hear the spring.

Alright, stopped by and picked up some 5.56 and ran 10ish rounds through the gun. Gun cycled but barely. It would pick up the next round, most of the time, but never would lock open on the last round.

Headspace checks ok, it closes on the "go" gauge and does not close on the "no go" gauge. What are some signs of overpressure on the spent casings? Just want to double check stuff I can

Vent hole is free from obstructions. Clean buffer tube. Any thing with the buffer tube I should check other than the vent hole in the end for venting?

Where would the buffer be marked? I looked all over the buffer itself and did not find any markings, just wanted to make sure I am looking in the right spot. Tested the rings like this and it holds up the entire BCG. It even takes a little pressure from my finger to make it fall.

It all went together pretty easy, considering I have never built one or have really zero AR knowledge. Lower - Bushmaster lower with DPMS internals Upper - Surplus arms & ammo upper (bought put together with bolt & charging handel barrel -16 inch m4 profile from sprotsmans guide stock &...