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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 9/4/2005 6:22:35 PM EDT
Any one have any experience with Colts sporter model. Is it a 5/8" barrel. I'm wondering if it has the same barrel whip as Rugers mini-14 causing accuracy problems.
Link Posted: 9/4/2005 6:39:33 PM EDT
Don't even compare a Colt SP1 with a Mini-14.

I used to have a SP1 and it was my first AR back in '71.

It's pretty accurate grouping about 1 1/2 to 2 inches at 100 yds.

Every once in a while I could make a 1 inch three shot group in the standing shooting position.

I wish I could have kept it but I traded it in with a Colt Sporter 2 in the mid 80s.
Link Posted: 9/5/2005 12:11:09 AM EDT
My dept has several original SP1 Colts and the accuracy is superb. I wouldn't mind finding an SP1 upper and converting it over to a free-float tube and see if it gets better.

Some guys really like their Mini14s. I think their barrels are shit personally. If you can get a good deal on a used mini get one of the aftermarket barrels for them to find true happiness.

SP1 barrels GOOOOOOD!
Link Posted: 9/5/2005 10:13:42 AM EDT
An SP1 upper is almost EXACTLY the same as the first M16 rifles.
The POI will vary as the barrel heats up in extended firing , or if you put pressure on the

( this is true with almost ANY rifle)

That said however , they do not "whip" when fired.

Due to the method of attachment , Barrel Harmonics with an AR15 are minimal.
( which is why adding a freefloat handguard usually makes them super accurate )

Use of 55 gr. ammo is advisable due to the 1/12 rifling twist of course.
Link Posted: 9/6/2005 2:42:02 PM EDT
Thanks for the info guys, I don't know how to make it hot but here's a link that seems like a good deal to me. Take notice that this price is with-out carrier group.

Link Posted: 9/6/2005 2:52:01 PM EDT
Do a search for "CDNN" and you will find a few threads on the Colt M16A1 uppers offered. I bought one and think it's awesome! There are some really great pics of finished rifles. JohnRippert built an absolutely kick ass one (as did many others).

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