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These Chinese guns are not constructed of the best metal in the world and you can damage the bolt body by trying to drive out a stuck extractor retaining pin. If you are having problems getting it out, it may be better to allow the bolt to sit overnight in penetrating oil. The pin that holds the extractor in place is often hard to drive out. Just to see how easily they interchange, we miked all four extractors and found that only the two from the stamped receiver rifles would swap. None of our four bolts miked out to the same size.ĪK-type extractors are very tough and rarely break.
#NORINCO MAK 90 REVIEW SERIAL#
The fact that these bolts are serial numbered is very important because they are not always interchangeable. The SA 85M bolt is blued, but doesn’t need polishing at any rate. If you want to improve its looks, use a soft wheel and jeweler’s rogue because hard wheels and medium buffing compounds remove too much metal. Work only the rough edges do not try to polish the whole bolt. Both our stamped receiver models needed their rough edges buffed. Inspect your MAK 90 bolt for rough edges and burrs left from machining. The bolt from the Hungarian SA 85M is slotted down both sides and appears to be perfect in every way. All three MAK 90 bolts are well finished and properly hardened but the bolt from the machined receiver is much better. Now push the bolt forward and out of its hole in the carrier. To remove the bolt from the bolt carrier, push the bolt to its rear position in the carrier and rotate it clockwise a quarter-turn. You may need to try it several times to get it just right. Remember, a little bit of pressure goes a long way. If the front lip allows the front of the receiver cover to move up and down, take a pair of needle-nose pliers and flatten out the top curve on the lip of the receiver cover. The same procedure will work on the rear of the receiver. If the front is moving from side to side, then squeeze the front bottom edges of the cover together. If your receiver cover was loose, place it back on the receiver without the internal parts inside and try wiggling it again. With the safety on fire, pull the bolt back as far as it will go and lift it up and out of the receiver. Now it may be lifted up and pulled straight back for removal. With the receiver cover off, you can push the recoil guide and guide spring forward until it clears the guide bars in the receiver. When it comes loose at the rear, lift it up and pull it back out of the receiver to remove it. Push the guide rod into the receiver cover and hold it there while you pull up on the rear of the receiver cover. The rear of the guide rod sticks through the rear of the receiver cover. Wiggle both the front and rear of the receiver cover to make sure there is no excessive movement. Remove the magazine, check the chamber and dry fire the rifle. Poorly fitting parts can be found in the new rifle, but only time and use will show wear points, spring problems, and slippage. A rifle that has had a thousand rounds fired through it is much easier to work on than a nearly new rifle. This is also true of the Hungarian AKM, SA 85M, the Chinese 56-S or one of the many Sino-Sovet AK/AKS rifles.Īs we disassemble the rifle, there are several factors to look for that will make a great deal of difference as we go along. As the stamped receiver is the most common, we will use one as our “classroom.” When you are working on machined steel receivers, you will find slight variations from the stamped receivers. Let’s take three MAK 90s and an SA 85M apart to look at some of the problems you might run into and a few improvements that you can make. When you work on a MAK 90, keep this in mind if you are trying to replace or change parts. Many intentional changes, from different springs to varied dimensions of internal parts, were made in the different plants that produced these rifles. We can’t tell you which parts will exchange until you get into specific manufactured lots. While some parts may exchange, the key to working this rifle is recognizing that not all parts will. public, not for battle, each was fitted to function individually. Some MAK 90 parts will exchange but because the rifle was made strictly for sale to the U.S. While the Russian and other military AK type rifles have battlefield exchangeable parts, the MAK 90 does not. Designed as a military weapon, it is easily disassembled and worked but not necessarily simple. The most common AK rifle copy sold in the United States is the Chinese-made MAK 90.