New Upper for OLY

308Loader · November 19, 2015, 03:32 PM

Was thinking about getting a new upper for my Olympic Arms flattop 16" chambered in 556. Are their any limitations on what type of upper I can put on it? commercial or mill spec? Thinking of going to a longer barrel or different cal. and want to build a separate upper for it.

Jimro · November 21, 2015, 09:59 AM

Pretty much any upper will fit, thanks to the standardization of AR-15s.

Jimro

Clark · November 21, 2015, 11:01 AM

I have an old Colt AR with bigger dia pins that does not work well with others.
I THINK that is the only exception to uppers fitting.

308Loader · November 21, 2015, 05:53 PM

Thanks.

308Loader · November 25, 2015, 06:30 PM

Is it easy enough with the right tools to build, or should I just buy a complete upper and separate bolt?

Jimro · November 25, 2015, 06:39 PM

You can assemble an upper with an armorers tool and a bench vise.

Not sure you'd save much over a cheap upper, unless you wanted premium parts. You can spend as much as you want on tools, or as little.

Easiest to buy a complete upper though.

Jimro

November 19, 2015, 03:32 PM	#1
308Loader Senior Member Join Date: August 24, 2014 Location: Minnesota Posts: 639	New Upper for OLY Was thinking about getting a new upper for my Olympic Arms flattop 16" chambered in 556. Are their any limitations on what type of upper I can put on it? commercial or mill spec? Thinking of going to a longer barrel or different cal. and want to build a separate upper for it.

November 21, 2015, 09:59 AM	#2
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	Pretty much any upper will fit, thanks to the standardization of AR-15s. Jimro __________________ Machine guns are awesome until you have to carry one.

November 21, 2015, 11:01 AM	#3
Clark Senior Member Join Date: December 4, 1999 Location: WA, the ever blue state Posts: 4,678	I have an old Colt AR with bigger dia pins that does not work well with others. I THINK that is the only exception to uppers fitting. __________________ The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought?

November 25, 2015, 06:39 PM	#6
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	You can assemble an upper with an armorers tool and a bench vise. Not sure you'd save much over a cheap upper, unless you wanted premium parts. You can spend as much as you want on tools, or as little. Easiest to buy a complete upper though. Jimro __________________ Machine guns are awesome until you have to carry one.

November 21, 2015, 05:53 PM	#4
308Loader Senior Member Join Date: August 24, 2014 Location: Minnesota Posts: 639	Thanks.

November 25, 2015, 06:30 PM	#5
308Loader Senior Member Join Date: August 24, 2014 Location: Minnesota Posts: 639	Is it easy enough with the right tools to build, or should I just buy a complete upper and separate bolt?