PDA

View Full Version : Problems with my homebuilt Romanian G *Updated*


JeffM
11-24-2007, 11:13 AM
2nd UPDATE: Found this thread, 10 months from the day I posted it, while looking for something else. I've put a few thousand rounds through her now, with nary a hiccup. :D Out of the dozens I've built or have helped to build in the last year, it's not the prettiest, but I can say that this one is still my favorite.

1st UPDATE: (original post below): It ended up being that I trimmed the rails too much and/or didn't bend them down far enough. Being that it was a rivet build, I had to start over from scratch. A big thanks to FEDUPWBS for his help in getting this new beast built up. And thank you everyone for the help and suggestions. I haven't fired it yet, but it hand cycles fine.

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2920.jpg

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2926.jpg

OP:
So I went to test my homebuilt this Thanksgiving while on the family ranch and ran into a few snags.

First, when I gave it a function check by trying to cycle rounds by hand, not a single one would chamber. It looks like the magazine is sitting too low for the bold to strip consistently. It looks like the bolt is catching in front of the rim and I end up with a round stuck at an upward angle against the breech face (see pic).

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2816.jpg

Problem number two is that when I cycle the bolt with out a magazine, about ľ of the time the bolt cams (clockwise if youíre looking at it from the rear) as it approaches the front trunion, and the left lug gets hung up on the trunion (see pic).

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2820.jpg

Problem number three is that the bolt doesnít push the hammer down far enough to catch on the disconnector. I know that this is a common problem and some folks have fixed it by doing a little filing, it looks like the distance between the hammer and disconnector is a little too far for that to work for me.

Problems number 1 and 3 lead me to believe that I didnít bend the top rails down far enough for the bolt to interact with the magazine and fcg properly. I have no idea why problem number 2 is happening.

Any help would be great.

Thanks,

Jeff

JeffM
11-24-2007, 11:18 AM
I did end up test firing it anyway by single-loading rounds in the chamber. Here are the pics of the casings:

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2846.jpg

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2848.jpg

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2850.jpg

JeffM
11-24-2007, 11:23 AM
Nothing to see here....

JHC
11-24-2007, 11:30 AM
I'll take a stab at the bolt camming problem, I bet your left side rail isn't in perfectly square ( the ejector might be pointing up slightlyand the the slot on the bolt is riding up as it passes the tip of the ejector.

ElCUBANO
11-24-2007, 3:49 PM
I have problem #1 the rounds just don't chamber right see the next thread anyone know what causes this.

Ford8N
11-24-2007, 7:25 PM
That looks like a homebuilt receiver. Sometimes the rails are trimmed to much and they will not guide in the bolt. What happens is the bolt jumps out because nothing holds it in the receiver. Another thing, that vintage kit,1983ish, the Romanians let the quality control go. Check and make sure the gas block/gas tube is guiding the bolt carrier in strait and not off to one side. To really know though, I would have to see it in action.

good luck

wayoutwest
11-24-2007, 10:08 PM
Look at the rails you welded in, are they at 90 degrees? Ho much gap between the trunion and the front of the rail?

When you cycle it by hand are you using the recoil spring to let the bolt close or are you riding it with your hand? Let the spring do it, pull it back and let go.

Did you trim the ejector enough? maybe it's a little to long/tight and is causing the FTF.

bridgeport
11-26-2007, 7:37 AM
Your left side rail looks to be too high from the photo, if your rails are too high (or one high one low)
the bolt will ride over the mag without picking up a round, that would also account for the lug being over the lip of the receiver. Place a drill bit on the rail and see if it lays flat from the rail to the trunnion, the rails should run on level
so the lug rides smoothely without a jump or dip into the trunnion.

FEDUPWBS
11-27-2007, 5:22 PM
Bring it by, no matter the problem it CAN be fixed. Nice grouping from the M1 carbine

ElCUBANO
11-30-2007, 8:15 PM
Can anyone recommend someone to assist with a FTF problem in my home built Rom. The FTF problems is the only thing wrong everything else seems ok I am in the bay area near SAN LEANDRO. Please pm me with the info. Thanks

wayoutwest
12-02-2007, 8:59 AM
If you want to drive up, I will help trouble shoot

God Bless The Mauser
12-02-2007, 11:57 AM
I had the problem with the bolt hitting the trunion when a jammed round bent the rail down. I had the same problem with rounds jamming like that due to a bad mag.

Winn R
12-04-2007, 5:15 PM
All of your problems could result from an excessive receiver height (top rails not bent down enough).

It's a little unclear but looks like a screw build; a suggestion would be to remove the front trunnion and fire control group, lock a 1.25" flat bar between the upper and lower rails, and hold the receiver in a padded vice.

If you have a brass bar it can be used to absorb hammer blows and allow the upper rail to be smoothly bent a bit further.

An indication things are back in spec can be performed by reinstalling the fcg and sliding the bolt and carrier with the trigger pulled. The disconnector should catch.

wayoutwest
12-04-2007, 11:44 PM
Is this the same Winn R from one of the big AK sites

if so, you input on some of the homebuilds will be appreciated, AK building is new here in CA

Welcome

Lateralus
12-05-2007, 1:02 PM
On the upside, its now a semi auto!!! throw on that pistol grip!!!




NOTE: intended to be funny. Do not put on PG. Dont ban me for insitigating illegal activities.






On a more helpful note, cough up the dough for an NDS-3 next time.

JeffM
01-04-2008, 12:18 PM
Updated!

FEDUPWBS
01-04-2008, 12:37 PM
http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2920.jpg

http://i219.photobucket.com/albums/cc154/JeffMsJunk/IMG_2926.jpg

Damn thats a good look'n sexy bich! Who Parked that sukka;) Your flat fu is strong grasshopper.

JeffM
09-24-2008, 7:48 PM
Found this thread looking for something else, 10 months to the day after posting it. Just thought I'd bump it for old-times sake. :D