metalmole

I have seen this very damage on both 556 and 762 rifles, caused by the buffer retainer machined in the wrong place! As one of you stated that when closing your action the carrier tail pushed the buffer off the retainer pin, that's what should happen. If the retainer pin is in the wrong place ( machined too far to the rear ) it will eat up the buffer, most of the time the pin will break..................

Thanks 98Z5V for the info, I think they changed there uppers so customers who buy an upper/rifle with the plastic handguards will have to buy there railed handguard insted of the aftermarket. I know I have purchased my last DPMS anything, I think they will realize they shot thereself in the foot, there are some pretty good manufactures coming along better compnets.............

Hi Larry, It seems that most of the manufactures who have decided to build 308AR lowers/uppers have went the DPMS type route, the SR25 type mags are a better choice for the AR type rifles, that mag is what Stoner designed for it. One thing that I dont find appealing about the DPMS lowers is the shelf that sits just above the fire control section of the receiver, I know its there because of the upper contour of the DPMS upper. I have seen more and more manufactures omitting this shelf, but only when they are also making an upper that matches there lowers. I dont know how much could be dont about this short of you making your own uppers as well, I think you would be on the right track if you did...........

I don't know how many folks know this, but DPMS changed the top height of there AP4 uppers some time early this year. I had an older AP4 upper with a DD middy handguard, I was designing a gas piston gas block to interface with the rail, after I got my project finished and working I decided to build another upper using the same height gas block and DD rail, WHAT!! the new AP4 upper was about .050 lower than my older one. Some searching around I found a post that someone confirmed what I had found. Today a customer came in with a new AP4 and a Tray rail, and sure enough the upper was about .050 lower, it looked like s--t, told him I didn't know what he should do. I think the rest of the manufactures of other DPMS type uppers are sticking with the original height. Can or does anyone else have any knowledge of this ??