Posted: 3/23/2012 6:46:31 AM EDT
| Should the buffer tube be flush with the inside of lower receiver near the retaining pin? The used AR that I bought has the buffer tube recessed about 1\8 in. I had it out to the range once and was having about a 10% FTEj rate, stove pipe. I read about the extractor spring replacement, haven't done it yet. Also read about a heavier buffer and new spring. I gave the AR a good cleaning(was a sewer pipe when purchased, shoulda passed but...) and gave the bolt a good cleaning and lubing with CLP. Thoughts? |
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The buffer tube should screw in clockwise until you cant move it in any further because it is contacting the buffer retaining pin.
You then turn counter-clockwise (less than one rotation) until it is in an upright position where the buttstock plate would fit in the recess on the lower receiver. This enables the tube to hold down the buffer retaining pin under spring pressure and enable it to function properly. V OUT |
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You are failing to extract.
Your buffer retaining pin should look like this:http://img196.imageshack.us/img196/2586/buffret.jpg Replace your extractor with this. http://www.bravocompanyusa.com/BCM-Extractor-Spring-Uprade-Kit-p/bcm%20extractor%20spring%20upgrade.htm If you have a commercial grade AR15 such as a Bushmaster, Rock River, DPMS, etc.. it is very likely overgassed. Swap out the buffer for a "H" buffer. http://www.bravocompanyusa.com/H-Carbine-Buffer-p/buffer%20carbine%20h.htm |