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Posted: 4/19/2010 3:25:38 PM EDT
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just curious about the large pivot pin lugs on the SP1, are those forward lugs under any real stress during firing?
Thanks Steve |
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I'm a little late with a reply but thought it was worth adding to the mix. I've shot the hell outta my RR SP1 conversion and have yet to see any wear in this area of the lower. I shoot 5.56, 7.62x39, 9mm and lots of 22LR.
However I have had a problem with an upper. Bought a used Daniel Defense large hole flat top upper and set it up in 5.56. Don't know how many rounds were fired by the PO but after maybe 2K by me it developed feeding problems. Turns out the hole in the uppers lug had stretched and was allowing enough movement to misfeed. Daniel Defense replaced the upper even though I was not the original owner and I've not seen any problems since. My take on this is that the lower has twice to surface area with two lugs vs the single lug on the upper to handle the stresses generated during firing. I now tend to check the lugs on my uppers as much or more than those of the lower. |
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Just figured I would share an experience I had with how tough these guns are. I was riding a 4 wheeler on a built up abandoned railroad track and had my M16 Colt Sp1 in one hand at the ready when all of the sudden my tie rod mechanism on the 4 wheeler broke and slammed me to the right and down the railroad bed into a tree. I was thrown over the front of the 4 wheeler and as I was going over I made the quick decision to save myself and just thru my M16 into the air down off the track into some trees. Luckily I was ok and unbelievably the M16 was perfect minus a few scratches and I immediately emptied the magazine in one trigger pull to test the function and it worked perfect. Sometimes you forget they are made to be treated pretty rough. The most surprising fact was that I had the gun configured as a 9mm at the time and it still worked perfect even with the blow the mag and magblock had to have taken.
Bottom line don't worry about the Colt SP1 it will be plenty strong enough. |
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I posted this question over on subguns and got some really interesting info. I was told that in the 70's some bigshots were questioning the strength of the Aluminum reciever so the Army cut the forward mounting lugs right off and conducted a demonstration that was designed to show the AR failing. They fired and fired and did not have any issue with the gun and could not get it to fail. They actually had to manipulate the upper to cause a failure to fire. the demonstration that set out to show how the M16 would fail did not go according to plan cause the Ar fired even without the front lugs. After hearing about this, I now have peace of mind
Thanks for the replies steve |
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