AR Sponsor
Posted: 1/11/2008 10:11:29 PM EDT
|
I searched and didn't find anything on this, so I"m not sure if this has been askede before. I bought a used M261 kit, cleaned it, lubed it up and put it in my Del-Ton 16" lightweight carbine. I throw in a mag, topped off with Remington Thunderbolt .22lr, pulled the CH back, didn't strip the round on the first try, just kinda pushed it half way out of the mag, pulled again and this time it chambered a round, I pulled the trigger, bang, ejects the shell, chambers a new round. So far so good. I pull the trigger again, click. Click? I pull the CH, there is a round in the chamber, it ejects that and chambers a new one. pull the trigger, bang, ejects the casing, chambers a new round, pull the trigger, click. You see where this is going. Every other round would go off. The un-fired rounds had no mark of the firing pin. So now the question: What could be causing this? Is it the main spring that cycles the kit? Is it too weak? It has problem pushing the first round out of the magazing. Maybe it doesn't have enough strength to drive the bolt forward on every other round so the firing pin wont reach the round? Is the blowback on the ammo not powerful enough to drive it far back enough to build up enough speed to push the bolt far enough forward? Any help would be much appreciated. On the few mags that it shot all 10 rounds flawlessly, it was a heck of alot of fun!! |
|
In reference to your problems with the model 261 there are several things you can do. First try another brand and type of ammo as these kits seem to be ammo sensitive. I've had very poor luck with Remington ammo in my rim fire kits. I've had much better luck with CCI mini mags 40 grain, Aguila SE 40 grain round nose lead, federal bulk 36 grn hollow point and 40 grn AE Federal to name a few. If the problems persist with a couple of other brands of ammo here are a couple of other things to consider. Remove and inspect the firing pin. It is possible the firing pin is broken or there may be crud in the channel obstructing the firing pin. Also some kits are very sensitive about the hammer spring. To strong of a hammer spring the round may not have enough energy to cock the hammer. To light a hammer spring and you may not have energy on the firing pin to fire the round. Another common problem is the chamber on a 22 rimfire can be deformed by the firing pin hitting the end of the barrel. There maybe metal thats been peened and catching on the round as it tries to feed. Inspect the bullet that didn't fire. See if the bullet has been shaved during the feeding cycle. You can also polish the inside of the chamber. The chamber could be out of dimension or just dirty. I've used Flitz on a barrel mob on a varible speed drill at low RPM to polish the chamber. The other thing to check is the magazine your using. It may not be accepting the 22lr insert or the insert might need cleaned or is defective. The more of these things you eliminate the greater likely hood you'll find out what is going on. I've also read where the guide rod on the conversion kit needs to be very tight and might need loctite sealed. Check to make sure the guide rod retainer on the M-261 is not bent or cracked. You may have bought a troublesome kit that no one else was willing to tinker with. If you invest a little time you can probably sort out the problem. When test firing the rifle verify the bolt is going completely closed. A lot of time the bolt will be just slightly out of battery causing the round not to fire. It might be a good idea to have someone watch the shooting cycle to see if they can see if the round is sluggish feeding or the round failing to fully chamber with a closed bolt. I know this is long winded but just trying to give you some ideas. |
AR Sponsor