bcm 14.5 mid length upper
smith % wesson m&p lower group
lmt bcg (parkorized)
standard lmt charging handle…
my weapon shoots perfectly and feels smooth when i shoot it, never had any problems at all, shot many different rounds with different magazines and it has no problems… my only concern is when i charge my weapon it feels and sounds chalky. some people have told me that i need to be using bcm parts if im using a bcm upper, and some people have also told me that a coated bolt, I.E. fail zero chrome coated bolt, would help smooth things out. my current bolt does have burrs in it and seems like it has had some rough machinery when being made.
My first suggestion would be to straighten your post out and break it up a little so it’s coherent.
Second suggestion is to not listen to what those other idiots told you.
Are you lubing your weapon properly? Have you applied any lube the charging handle? If not, that would be a good place to start. In addition since this is a new weapon it’s going to wear in and smooth out.
In addition to what the two previous posters said it sounds like your receiver extension is still wearing in. It’ll take time but eventually it’ll smooth out.
sorry if the initial post was confusing, this is my first time posting on a forum…
when i slowly charge the weapon it honestly sounds like its in the spring on the buffer tube that is sounding dry and chalky… i do lube the shit out of it all the time and have put about 300 rounds through it so far… it has gotten a lot smoother than the first time i put it together but it doesnt seem like its getting any better now.
I know that feeling. I have it in an SBR I built with an aftermarket buffer spring (VLTOR receiver extension), and in a Light Recce I converted to an A5. 3000 rounds through the latter rifle since. It still does it, but I see no unusual wear on any of the parts (tube or spring) and the rifle functions perfectly. IMHO that’s what matters and I don’t worry about the sound/feel.
I have a coated bolt carrier. It does feel smoother but it doesn’t make the rifle shoot any better. Don’t spend the extra money on a coated carrier because it’s not needed. Your rifle will smooth itself out with use
It’s not the bolt carrier causing most of the grittniess, it is the tooling marks in the buffer tube, the buffer and the irregularities on the surface of the spring cause by shot peening draging on said tool marks.
Lube this area well and let it wear in properly. In time, it will smooth considerably.
I’ve handled two Colts for a very long time. when I tried out the charging handle on other rifles I freaked out at how chalky they were myself. The Colt sounded like an air pump compared to them.
I always used ol’ military CLP on them, though. With my most recent rifle there was a slight chalky to it. I took out the buffer and spring and ran some CLP all over them. That rifle’s tube isn’t all nutsy sounding now, but it’s still not like the Colts.
Now, the sound isn’t something I’d be worried about but I know how it can be concerning. I personally hunt with ARs and cambering a round slow isn’t so far fetched. In fact I’ve had to do it a couple times (I don’t recommend doing it a lot) - but for all other purposes, again, I’d not be worried.
Wait until you get around 5000 rounds in an upper. Those tracks will be the full range of motion inside of the upper receiver. Don’t worry, normal. The BCG will also show the spots where it is wearing against the upper. Should be on the four corners of the rail on the top and bottom of the bolt carrier group.