First Gun a self built AR?

[andrew3081]

Though I respect your opinion my friend, i might point out that we are clearly into this specific hobby for different reasons! If I intended to simply buy ammo and shoot, I would have stuck with paintball or video games. I have chosen to learn about this specific area of guns by casing my self in deep. Sorry if this does not jive with your way of doing things.

paintball and video games are not the same as shooting a firearm.

 

[liberal-hater]

Dont forget to grease up the barrel nut

And also grease the upper's threads too. Torque up and loosen about 3 times, then final torque and check timing for the gas tube.

Further for the original poster:
There are zillions of partial and complete AR's on this site, many of which have parts well worn from constantly assembling and disassembling, sometimes with little skill. Few owners seem able to leave them alone.
The biggest single problem I have seen is improper or no lubrication, leaving damaged threads on the upper, the receiver extension threads, and accelerated wear on the fire control group.

 

[barsik]

when I did my guns I learned that the nut is a bit of a trick.use lots of lube on the upper and the nut and once the nut starts to torque up just a little bit start looking for the gas tube alignment because the nut tightens up very quickly,and the alignment is quite critical.

 

[liberal-hater]

when I did my guns I learned that the nut is a bit of a trick.use lots of lube on the upper and the nut and once the nut starts to torque up just a little bit start looking for the gas tube alignment because the nut tightens up very quickly,and the alignment is quite critical.

You should use a torque wrench for best results.
Torque Values:
Compensator (Flash Suppressor) - 15 to 20 Ft. Lbs.

Barrel Nut - 30 Ft. lbs. Minimum, not to exceed 80 Ft. Lbs. to align the next slot in the barrel nut.

Carrier Key Screws - 35 INCH pounds to 40 INCH pounds.

Lower Receiver Extension (Buffer Tube)
Rifle - 35 to 39 Ft. Lbs.
Carbine - Tighten the locking nut to 40 INCH pounds plus or minus 2 INCH pounds.

 

[barsik]

thanks for the torque specs on the assembly for the ar15.I got the specs for my rifle from several different sources(upper manufacturer,barrel manufacturer,and various websites.I also watched a few of the youtube clips putting these things together.the barrel nut on my builds(only 2)tighten up very quickly from first contact,they are not like a typical bolt/nut scenario and the torque wrench really only tells where your torque is at when you have aligned the gas tube.1 gas tube notch on the barrel nut is all I got from light contact to 47/62 lbs(this is rifle1/rifle2). and perfect gas tube alignment.if possible you want to get this right the first time,as overtorqueing and then loosening stretches and wears the threads on the upper.