Recent content by mnotx

What decent scope choices are out there for an AR15 A2 carry handle mount. I don't want the picatinny rail mount, just a scope that mounts directly to the carry handle. All I have found so far is what appears to be cheap Chinese junk or very expensive ACOG sights. Is there anything in...

Re: M16/AR15 Function This is going to take a while to read!

Re: M16/AR15 Function Hamilton I received my education at Aberdeen Proving Ground many, many years ago. (I love the Internet, but don't take it as gospel) My original post was in a thread about the "best" heavy grease or oil for the bolt lugs. From what I remembered, the bolts lugs didn't...

Re: M16/AR15 Function Yeah, I got it open at home. The patent doesn't mention it anywhere, so apparently it wasn't an original design function. But does it make a difference? I think the only way to know that would be to test two identical rifles, except one being DI and the other piston...

Re: M16/AR15 Function Well, now it gets controversial. I was wandering the AR15 forum and found this: http://www.ar15.com/content/page.html?id=256 This is basically what I was told years ago. If it isn't mentioned in the patent, then I would think it was either not an important feature...

Re: M16/AR15 Function I can't open the patent description for some reason, but I will try again once I get home. However, if it isn't mentioned in the patent description, then I would think it was not very relevant. Thank you for the explanation. I was hoping someone with knowledge would...

Re: M16/AR15 Function Curiosity and the pursuit of facts. My explanation was taught to me about 40 years ago. One of the points made back then was that the pressure equalized momentarily until such time as the bolt carrier traveled enough to disconnect the carrier key from the gas tube, or...

Re: M16/AR15 Function It is difficult to visualize, but if you have a complete bolt carrier group (carrier, bolt, cam pin, firing pin, etc.) look at it closely. When the bolt is pushed back to it's "locked" position, the large flange on the firing pin completely covers the back of the bolt...

Re: M16/AR15 Function Yes, strictly inside the bolt carrier. The gas is directed into a space inside the bolt carrier between bolt gas ring seal and the back of the bolt carrier. The firing pin flange should form a seal in the back of the bolt carrier, assisted by the hammer to resist the...

Re: M16/AR15 Function Wow, 56 looks and not a single response. I was hoping one of the armorers on here would chime in and confirm or correct what I was taught.

I threw this into another thread which touched on the subject, but the other thread sort of digressed from bolt lubrication. Thought I would post it alone since there are quite a few experts here and I was curious if I understood the function correctly. So here goes the previous post: I...

Re: Synthetic Motor Oil to lube their AR 15? I thought a properly working AR15/M16 was designed to have the pressure equalize momentarily at the time the bolt head rotates to unlock. That is why the gas ring seal, firing pin flange, and timing are so important. The bolt lugs should be under...

Re: Another PSL question Mine does not have the bolt-hold device or the block the sliding bolt-hold device sits in. There is simply a round pin across the receiver at that point.

Re: Another PSL question I will check it out Saturday. I'm interested if it is simply a missing bolt-stop, or if the receiver has been machined without any bolt-stop provision. I'll post the results.

Re: Another PSL question Century's response: <span style="color: #000099">Good Morning: This rifle was assembled using a US made receiver and original lined barrel. For different reasons during the development process, it was decided to delete the hold open device. The operation is otherwise...