having a problem feeding my ar

[boogak]

when i pull the charging handle back and let go the bolt assembly would get stuck back. it wont feed the ammo unless i force it in. but in doing so it is hard to pull the handle back to eject the case. please help
thanks

[Blue]

Does the bolt function properly without a magazine in the weapon?

[boogak]

yes it does
it also functions fine with mag in with no ammo

[Blue]

What kind of ammo is it?

[slick_711]

It won't feed or eject? Your description is a little vague for a real diagnosis, but that sounds like a major issue. Is this happening with an empty mag in the mag well? What about without a mag? I'm sure myself and some others can try to help if you can provide a little better explanation, sorry.

Anyway, I can't feed mine either, ammo is so damn expensive.

[Blue]

Also when fired does it eject?

[boogak]

i have never fired it. i just wanted to check to see if it functions right by hand. with an empty magwell it will lock back and go forward no problem. i am using xm193 ammo i think is. once there is ammo in it it wont charge forward.it wont feed unless forced. also wont eject unless forced. i hope this is a better description, also thanks for your help guys

[Blue]

Weird. You're pulling the charging handle back, and full on letting go right?

[boogak]

yes,

[xrMike]

Assuming you are using a 10-round mag, does this happen only when you have 10 or maybe 9 rounds in the mag? What if you have only 5 rounds in the mag? What happens then?

[boogak]

it would make the ammo stuck, unless i force it in

[boogak]

it does the same with 1 round or 10. weird huh?

[Technical Ted]

when i pull the charging handle back and let go the bolt assembly would get stuck back. it wont feed the ammo unless i force it in. but in doing so it is hard to pull the handle back to eject the case. please help
thanks

When you say you let go of the charging handle, do you mean that you let it go when it's drawn all the way back, allowing the buffer spring to drive the bolt carrier group into battery?

Or are you riding the charging handle forward, acting as a brake on the forward movement of the bolt carrier group?

What do you mean by "force it in"? Are you using the forward assist or pressing forward on the the bolt carrier cut outs through the ejection port?

How many rounds of ammo are you loading in the magazine? Does the problem occur after you've loaded it to capacity? or with one or two rounds?

Are the rounds hanging up on the front of the upper receiver interior? On the feed ramps? Going into the chamber?

Do you have an M4 upper receiver with extended feed ramp cuts and a standard barrel extension without corresponding extended feed ramps?

Examine the rounds after chambering. Are they scratched or damaged?

What is your barrel chambered for? 5.56 NATO or .223 Remington.

[Blue]

You gotta lotta boogers in the chamber or something? Who built the upper? What caliber is it chambered for?

[Technical Ted]

Does your charging handle rub up against, or contact the back of the lower receiver or the buttstock? If it's a collapsible stock, is there any contact between the charging handle and the receiver end plate.

Looking into the upper receiver with the bolt and charging handle pulled back, is the gas tube centered in the slot for the charging handle.

Are the bearing (sliding) surfaces of the bolt well lubricated? I mean dripping with CLP. If the rifle hasn't been fired, the finish will still be rough.

Have you tried another magazine?

With rounds in the magazine, does the bottom rear of the bolt catch lay flat against the web of the receiver separating the mag well from the trigger group cavity?