AR15 Forums

What is the difference between the 5.56 NATO and a normal 5.56?

Hello folks,

I have a Colt 6920 that I bought quite a number of years ago as an OEM rifle. It has never been fired because I only recently finished installing the final parts to complete the rifle. My question is about making it ready for its first fire. Do I take it apart thoroughly, lubing it with Break Free CLP, or can I lube the barrel and let her rip? Should I grease the bearing surfaces on the bolt carrier or use the CLP? I am not new to firearms, but this my first serious rifle. Knowledgeable help is appreciated. It's a 6920, so it is labeled M4 carbine. I can't imagine that makes a difference, though. Thank you, Eric M.

A few years ago I won a ar-15 at nra banquet. Long story short they raffled off the wrong gun the ar I received has all 0’s in the serial number. It is a Daniel defense I think that year it was gun of the year. I have the very first one assembled that year it was supposed to go into there museum. Wondering what it is worth?

Doing my first AR build.got my striped lower and striped upper.so far I got all my lower parts bought and installed yesterday.installed my forward assist in upper yesterday.it is so cool to do everything piece by piece.it gives you a better understanding of how everything works and how cool the AR rifle design is.now i just need to get the rest of the parts a little at a time as the funds become available.the funds right now are more of a task right now that building an AR.after becoming ill and having no income at the moment.but like life and a AR build everything comes togather piece by piece right

Today I became a new member of this forum and look forward to learning more about my AR. I have participated in benchrest - both rimfire and centerfire - matches for quite a few years. I have a Rock River Varmint with 24 inch barrel I've used in factory BR matches and have had some success with it. I really don't use the RR for matches anymore however want to set it up for varmint/coyote shooting. I am currently thinking about changing the barrel from the current 24 inch to a 18 inch model - easier to pack around and lighter weight. I want to use a factory barrel from Rock River and they informed me I needed the following;

* 18 inch varmint barrel without gas block
* low profile gas block
* mid length gas tube

Does this sound correct? I also need to purchase the tool(s) need to change out the barrel - what would I need? Also are there any good utubes videos online that would walk me through the barrel swap? I've replaced barrels on my benchrest rifles however that's a simple "screw the old barrel off and install the new one" not much to it.

I would appreciate any advice on this.

Thanks