4 problems

[indy_Muaddib]

This is a Kit built AK, not a store bought WASR

Problem #1: Bolt riding over rounds, only happens on rounds stacked on the right side. (gun facing away)

Problem #2: bolt carrier jamming on hammer (weak spring??)

Problem #3: bolt jamming on side rail. bolt is twisting clockwise when the carrier goes forward and it jams between the top rail and side rail.

Problem #4: scratches on the side of the brass, same wavy pattern every time, runs from half way down the bullet itself all the way down to the base.

any help with these 4 problems?

[flopshot]

is this a bent flat or 100 % receiver ?

[panzer]

#1... Mag might be too low. You can use a new mag catch and then fit it for proper mag height.

#2.... Is it a US made hammer? These are notorious for being out of shape and dragging. Especially on 5.56 or 5.45 rifles. You can regrind the face, or check with red star arms for a correct one.

#3... bolt might be installed 180 out in carrier. Hard to do but can be done. This is a wierd problem,

#4... seems like feed ramp/bullet guide issues. or a small bur near the chamber area.

[indy_Muaddib]

Nodak Spud NDS-3 receiver

tried several mags, they all do it, US or foreign made doesn't matter.

original Romy hammer, all matching kit.

have to check that bolt, pretty sure i have it in correctly.

ill check for burrs, see if thats whats scratching it.

[panzer]

Damn. Stumped now. Check over at the AK files, there are some AK geniuses in there.

[XHardrock]

Sounds like high rails could be resposible for 3 of the 4.
It explains bolt over the round, binding of the carrier, (ak's love to be loose) and maybe the bolt twist or that may be a long ejector.
I would round everything and make sure both rails are the same distance from the top rail.
Keep us updated.

ETA: Check another ak and see if the lower rails protrude further towards the interior of the receiver, shortening the rails can solve alot of bs.

[flopshot]

factory receiver makes this a little tough to guess.

did you fit the top rails to the bolt carrier ?
is the bottom of the carrier worn or modified ?
is the mag very tight when you insert it ?


problems two and four are easy to repair after the others are addressed.

[xtremerange]

Left side rail too high? That would cause the mag to be high on left/low on right for missing the rounds in the right of the mag and it might cause the clockwise torque on the bolt.

On the wavy brass, look into chamber.

[Wayne_51]

When I e-mailed NoDak Spud (Harlan) he told me that if I was using the standard AKM rear trunion included in my Romainian parts kit, I needed the
NDS-1 receiver. Sound like anything you have? Thinking maybe a different receiver works differently.

[indy_Muaddib]

both rails seem to be the same height.

some mags are tighter than others but they all fit and come out ok.

perhaps its the fact im using the original FCG, the NDS receivers aren't exactly the same spec as original AKs.

[flopshot]

since you're using an original FCG and will likely change it out for a 922 set,,,,
mark the area of the hammer that meets the bolt (firing pin) and do not touch that area, carefully remove some from the top (hammer cocked) so the carrier rides a little easier over it. not so much that it won't engage the disconnector. see if that cures the problem of not stripping the right side round. you can round off the back side so the return stroke is a little smoother.
unless you took too much off the top rails, you still have me stumped on the carrier jumping out if your receiver is to spec as you say.

[indy_Muaddib]

dropped a wolff +15% spring and a buffer into this thing.

shaved a bit off the hammer, polished the face and the carrier.

thing runs like a scalded cat now.

and yes, i made sure i didn't touch the slam fire safety area.

new problem, is it common for the upper hand guard to catch the **** on fire?

[Dirt1042]

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Like this?

[indy_Muaddib]

wasnt that bad, just a bit of flareup.