Magazine Trouble, Kahr 27
Posted 22 July 2003 - 12:27 PM
I don't know what the problem is, I went over the magazines last night, they all fit about the same, but the hole on the one that is troublesome is 5/100 ths larger than on the three mags that are working. How is it though that it trips the hold open? I haven't a clue. I tried a different spring in the magazine, but no cure. This came up elsewhere on the old board, sorry to revive it.
Posted 22 July 2003 - 07:59 PM
If the spring gets loose it will get jammed and will hold the bolt lock open and not in any pattern. If this is a commen problem would some of the long time members please respond as to a fix .
Posted 22 July 2003 - 11:53 PM
Posted 25 July 2003 - 11:34 PM
As for the bolt locking back, I don't think it's the magazine. The magazine follower has a little lever on that activates the bolt hold open lever on the last shot. If your magazine still had cartridges in it, then I don't see how it can be the problem. A carefull disassembly and examination of the bolt hold open lever, called the trip, is in order. Look for wear on the trip. Thats the little deeley that locks the bolt back when the follower hits it. It is one of the parts that pivots on one of the pins in the pivot plate. Remember not to take out the pivot plate with the frame on the receiver, as this will teach you new cuss words. You will also want to check the springs in the frame, I believe one of them (I can't remember off the top of my head) applys a little force to the trip to keep it in the down position. In fact, that is probably the problem. Without a little spring tension the trip could fly up from recoil motion, and lock your bolt back even though you still have cartridges left in the magazine.
(If you want to see how the whole gizmo works, take a look at a empty box magazine (or "stick" if you prefer ) and look at the back of the follower. The Follower is the metal thing on top of the spring. Press the follower down. See that little tab of metal sticking out that disappears into the magazine body? That's the bolt hold open lever on the magazine, on the last shot, it transfers its movement to the trip. Look in the magazine well right in front of the trigger. You should be able to see a little lever sticking out, at the height of the magazine follower on the last shot. It pivots like a seesaw on one of the pins in the pivot plate to transfer it's motion to another little gizmo, (lifter, I believe, but I'm going from memory here...) that pops up to hit the corrosponding notch on the bolt, and presto, the bolt locks back. The drum does not have a mechanism to hit the trip, one of the main design flaws I see in the Semi-autos. A gunsmith could make you something to do that, or you have to get a separate little tool called a "third hand" to stuff up the magazine well to activate the trip. Well, I hope I sounded halfway coherent there, and I'm confident that you will find a bad lifter spring as your culprit. Good Luck!)
Posted 28 July 2003 - 10:28 AM
Comparing the 27 and my M1 the pawl springs were both well seated and tension about the same-meaningless as i don't have a means of measuring them accurately. I've put 100s of rounds through the magazines in the M1 without a problem, and at first they functioned fine in the 27, then started this hold-open activation with the mags still partially charged.
I thought like you that the recoil combined with a sloppy fit between frame and receiver was tripping the hold open and that maybe the spring was weak, but then again- I swapped frames between the 27 and M1 and still had the problem. Yet the M1 never does it with its frame. If the pawl spring were weak, I would expect to see the M1 have the same problem activating the hold open....
Anyway, I solved the problem. Am sending the gun off to PK.