I've searched around and I've seen some occasional mention of the barrel extensions on TGI AMD-65s being somewhat canted. I bought one of these last week and I noticed mine is slightly askew as well. Looking down the barrel, it doesn't look like a bullet traveling down the barrel will contact the extension at all (which is a relief). The FSB and the gas block are also slightly canted. How common is this with TGI builds?
I'm just curious. I still like the rifle.
All those symptoms (and more) are typical of these hasty builds. However, if you get one with the original barrel and the FEG SA2000M receiver and wood grips, it's still a nice AK. I freaked when I saw the twisted gas block resulting in a skewed gas tube, but after going through the gun very carefully, I found that it basically made no difference. The bolt carrier extension does rub the trunion very slightly but it doesn't put the carrier in a bind. I noticed the same rub marks on my factory FEG SA85M, and that thing is straight as an arrow. Twisted sight base; may cause you to have to adjust the windage on the front sight too far over for a good sight picture. On mine, I put a wood block up side the rear sight and beat it over so I could center the front sight, and it stayed like that - don't forget, rear sight follows the direction you want the point of impact to move - front sight goes opposite. Crooked barrel extension; no, the bullet probably won't hit it, but most of these were not screwed on tight before welding, so they could index the brake right. This allows vibration during firing which eventually breaks the weld. You can take it off and put on the Tapco one-piece extension brake. You or your 'smith will have to fit it to get it tight and properly indexed before welding. Other possible shoddy situations; trunion set in receiver crooked - barrel not in line with receiver. Actually, this does not affect sighting, since the sights are on the barrel and trunion and they are in line with each other. It does affect the bolt carrier and gas piston - they don't go around corners very well. In fact, tolerances on the AK are so loose that even this PLUS the canted gas block is still not enough to have any effect on operation. On mine, I also found the magazine well expansion work had not been fully completed - there was a sharp protrusion left on one of the magazine guide rails that caught the mag and made insertion difficult while it scratched and gouged the magazine. Fixed this in a few minutes with a file. I guess most guys would have sent it back, but I kept it too long for that. Now it's like a mutt puppy that you were going to get rid of but kept too long, so it's there for the duration.
Thanks for the reply. My AMD isn't awful. It does have some slight front sight cant. Looking at it, I think there's a little gas block cant as well. The extension is what initially freaked me out the most. It's eventually going to a 'smith anyway, so I'm not too worried.
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Mine had a canted extension on the brake which caused the bullets to nick the top of the extension on the way out causing the rounds to tumble and go anywhere but straight.
Got bold, hacked off the extension and original brake, fitted a Tapco extended brake and welded into place.
Of note, Tapco used some crappy pourous metal for the extended brakes which is a pain to weld and there was alot of extra slop in the thread spacing. We ended up using some low temp solder tighten up the threads, green loctite and then tig welding the brake to the bottom of the front site after using a dowel to properly set the center so it wouldn't cant while welding.
Sort of a pain in the ass, but it became a battle of wills with the brake and the brake lost.
now that it actually hits where I aim it, it's a great gun! Shoots well, hasn't malfunctioned, etc.
I just need to finish putting a rear sling swivel on the receiver (I already cut the slot in the side of the reciever for it) and I'll be golden.