All purpose "Help me build my AR" thread.

[nimdabew]

I wanted to make sure I wouldn't be getting something I didn't want like a bayonet lug.

Why wouldn't you want one?

[SamB]

Alright guys. Time for optics questions. Whats the consensus on the vortex SPARC? Good? Bad? Indifferent?

[jdbl14]

I am pretty sure that I will be putting a trijicon accupoint on my middy-dissipator. Does anyone here have first hand experience with these? If I don't get an accupoint I will probably get an acog. I have used one before and really like them, but I think the 1-4x magnification sounds great.

[RickOShea]

I am pretty sure that I will be putting a trijicon accupoint on my middy-dissipator. Does anyone here have first hand experience with these? If I don't get an accupoint I will probably get an acog. I have used one before and really like them, but I think the 1-4x magnification sounds great.

I don't know nuthin' about the Accupoint, but I really, really like my SWFA 1-4 SS: http://swfa.com/SWFA-SS-MRAD-Scopes-C4225.aspx

[0122358]

I am pretty sure that I will be putting a trijicon accupoint on my middy-dissipator. Does anyone here have first hand experience with these? If I don't get an accupoint I will probably get an acog. I have used one before and really like them, but I think the 1-4x magnification sounds great.

I don't know nuthin' about the Accupoint, but I really, really like my SWFA 1-4 SS: http://swfa.com/SWFA-SS-MRAD-Scopes-C4225.aspx

hey what kind of muzzle brake is that?

[RickOShea]

hey what kind of muzzle brake is that?

It's an EGW Space Comp.....and it has a pretty wicked side blast. http://www.midwayusa.com/product/294244

[CipherNameRaVeN]

Guys,
buddy of mine wants to pull a trigger on this AR. I don't know enough to give him good advice.
http://www.gunbroker.com/Auction/ViewIt ... =288065829
Started at $1,150.00
Yeay or Neay?

[JFlagg]

If you're getting galvanic corrosion between the nut and the upper, does anyone use anti-seize on the threads? As a mechanic, I swear by that stuff!

The BCM and PSA uppers look like they have a white lithium type grease on the receiver threads.

Grease is not anti-seize, but I suppose it's better than nothing.

I didn't say that it was. Just said that that's what it looks like comes on the threads from the factory.

ETA: I've never had much trouble removing the barrel from the receiver of an AR, so perhaps someone forgot to put the white lithium grease on JFlagg's PSA upper when it was being assembled.

Yeah, my nut threads appeared bone dry... No obvious lube. I wouldn't think any corrosion would have started as the upper was newly assembled about 3-4 months ago and has been stored in my dehumidified war room.

[Bearcat]

OK, having trouble with this. Anyone know who makes a non-forward-assist upper in 5.56 with the M4 ramps and the rail running all the way along the top (so you can match it up to the top rail on the HG)?

Pretty sure Smith and Wesson makes a light weight sporter model like that.

[CipherNameRaVeN]

How about this one?
http://www.gunbroker.com/Auction/ViewIt ... =287649680
Started at $1,695.00
This NO RESERVE auction is for a Professionally built Project custom AR copying a popular gun magazine rifle build. Rifle is an ultralight 5.56 (5-1/2lb.) AR15 carbine. Basis for the build is a pre-ban (1993) Colt Competition HBAR that was virtually new and stored in a safe for 12 years. SPECIFICS OF THE BUILD with all NEW components: 1) Vietnam era profile custom Bushmaster chrome lined barrel, 2) Factory installed J&P Enterprises single action trigger set to 3 lb pull with no take-up, and no over-travel with the J&P custom anti-walk hammer and trigger, 3) Carbon fibre cylinder forend w/ventilated alloy barrel nut, 4) J&T alloy gas block with picatinny rail (optional Mil-Spec A2 front sight/gas block included), 5) Aimpoint 2 MOA Comp C3 red dot sight, 6) LaRue Tactical M2/ML2 Quick Detachable Red Dot Mount w/spare battery compartment, 7) Magpul CTR 5 position stock assembly w/Locking lever & Mil Spec buffer tube assembly (includes additional Magpul SGA low cheek riser adapter). COMES WITH: - Original 1993 Colt box, - Three 10-round and two 20-round Colt aluminum magazines, - Original A3 removable Colt rear-sight carrying handle, - Single point quick-detachable nylon sling, - Brand new forend removal tool. ADDITIONAL INFO: Over $3,000 invested. The rifle was fired exactly 28 times to sight it in, AND HAS NOT BE FIRED SINCE. Rifle must be sent to FFL holder. I need the FFL Licensee telephone number. Will accept USPS Money Order, Certified Check, PayPal, or Personal Check that must clear before shipping. Shipping cost is actual cost of shipping. Once you commit to buy I will email the actual shipping cost amount. More info and photos upon request. AVAILABLE FOR TAX FREE PICK UP IN PHOENIX, AZ.

[Makarov]

@Cipher
Looks like he wants a lightweight hunting rifle? Both guns are built very specifically, is he sure that they have the features he want, so that he doesn't have to change out parts afterwards? Also, how much knowledge does he have on AR's, one is new(and probably has some kind of warranty), the other is used. That might be something to consider.

That being said I think that both rifles suggested'll do OK as a rangegun/hunting rifle. The DPMS stainless barrels does actually have good precision.

[williaty]

I also want to build it myself from the ground up. If I can't take it apart and put it back together, I can't depend on it. I'm big on knowing how everything works and having repair parts on-hand.

[Regular Guy]

How about this one?
http://www.gunbroker.com/Auction/ViewIt ... =287649680
Started at $1,695.00
This NO RESERVE auction is for a Professionally built Project custom AR copying a popular gun magazine rifle build. Rifle is an ultralight 5.56 (5-1/2lb.) AR15 carbine. Basis for the build is a pre-ban (1993) Colt Competition HBAR that was virtually new and stored in a safe for 12 years. SPECIFICS OF THE BUILD with all NEW components: 1) Vietnam era profile custom Bushmaster chrome lined barrel, ]

I can't read past the Bushmaster brl. NO. JUST NO. Not at that price. That is some jackass's home build bullshit. Granted, I'm build all my ARs but if I built you an AR it would only cost my cost.

If you're looking to spend $1695 on an AR it better say Daniel Defense, Noveske or Colt all fucking over it and have an optic on top.

[CipherNameRaVeN]

Thanks, guys!
This is the one he went with. It ill be his first AR.
he just wants a range gun.
The seller included the Bushnell scope that you see in the picture, minus bi-pod.
$1,200 shipped.

[JFlagg]

I searched around and only got fleeting mentions of quick connect/disconnect mounts for optics. Specifically I'm wanting to get a set of rings for a 4x scope that I have so I can use it on my AR and plunk varmints. The kind I want are the rings with the base that uses a cantilever to lock onto the rail for quick removal or assembly. My question is, after zeroing, if I remove the scope, then put it back on how well do they hold their zero? Dead on still? Or will I need to do a few test rounds to make sure the scope is still sighted in?

I'm sure quality of the product has a big influence... Some polymer air soft mount probably wouldn't be near as reliable as a nice metal set from a reputable manufacturer. Anyone use a set and can comment?

[Dave_M]

My question is, after zeroing, if I remove the scope, then put it back on how well do they hold their zero? Dead on still? Or will I need to do a few test rounds to make sure the scope is still sighted in?

Depends on the mount.

[Makarov]

I searched around and only got fleeting mentions of quick connect/disconnect mounts for optics. Specifically I'm wanting to get a set of rings for a 4x scope that I have so I can use it on my AR and plunk varmints. The kind I want are the rings with the base that uses a cantilever to lock onto the rail for quick removal or assembly.

Depends on the mount.

Which could be translated to shell out for a laRue or a ADM and never look back.
There are several others out there, but these are considered industry standards. So why not spend the extra $40-50?

I prefer LaRue myself. With my old guncabinet I had to remove the scope on my AR to get it to fit. Held zero every time I mounted it. Bombproof. IF you manage to break it, Mark LaRue will give you a new one, no questions asked.

[JFlagg]

OK, thats what I wanted to hear. I was planning on getting a quality mount, I've built my AR out of all quality parts so far. Wasn't planning on skimping with optics, etc... Just didn't want to buy a mount and it not hold zero after putting it on/taking it off a few times.

[CipherNameRaVeN]

I went to a Practical Rifle Shoot yesterday. During one of the reloads my AR slam fired.
First time it ever happened. The rifle is Colt 6920 with about 1000 rounds through it.
It was not cleaned after 120 rounds from the previous week. But, I did drop some oil before this shoot.

I am going to see if I can carefully replicate the slam fire at the range again. Maybe it was a fluke.

However, I've been thinking... if there is a problem, it must be the problem with the bolt.
Would not it be cheaper to replace the bolt completely than taking it to the gunsmith?

[KentsOkay]

This seems to me to be a good price. Is there a generic buffer weight that is just assumed?

This plus a LPK, and I have everything I need to assemble a lower, yes?

http://www.gunauction.com/buy/10963958/accessories/tactical/ar15-2fm16-carbine-6-pos.-m4-stock-new-best-price!-1-percent-to-the-nra

[nimdabew]

This seems to me to be a good price. Is there a generic buffer weight that is just assumed?

This plus a LPK, and I have everything I need to assemble a lower, yes?

http://www.gunauction.com/buy/10963958/accessories/tactical/ar15-2fm16-carbine-6-pos.-m4-stock-new-best-price!-1-percent-to-the-nra

Please don't.

PM me or call me for my advice on stocks and shit.

[Makarov]

OK, thats what I wanted to hear. I was planning on getting a quality mount, I've built my AR out of all quality parts so far. Wasn't planning on skimping with optics, etc... Just didn't want to buy a mount and it not hold zero after putting it on/taking it off a few times.

Then my advice will be to buy a LaRue mount. With the exception of one Aimpoint who has the original mount, I've got all my AR optics in LaRue mounts. It's so stupid simple and bombproof that I sometimes forget that there are other options.


Caveat: I'm a frikkin' LaRue fanboi. I only wear LaRue caps(cause I got a small head, and they're some of the only ones that fit), and when I BBQ I use LaRue Dillodust on everything...

[JFlagg]

OK, thats what I wanted to hear. I was planning on getting a quality mount, I've built my AR out of all quality parts so far. Wasn't planning on skimping with optics, etc... Just didn't want to buy a mount and it not hold zero after putting it on/taking it off a few times.

Then my advice will be to buy a LaRue mount. With the exception of one Aimpoint who has the original mount, I've got all my AR optics in LaRue mounts. It's so stupid simple and bombproof that I sometimes forget that there are other options.


Caveat: I'm a frikkin' LaRue fanboi. I only wear LaRue caps(cause I got a small head, and they're some of the only ones that fit), and when I BBQ I use LaRue Dillodust on everything...

The LaRue SPR and the American Defense Recon both look like what I want. Gotta lay my scope on my rail and measure to see what kind of eye relief I'll need and see if the height of the mount clears my rear sight... Thanks for the advice.

[the boz]

I am posting this here to help others who are looking to go free float on a budget (purchasing the rail only).

I had a RRA with carbine length drop in rails.





you will have to punch out the 2 pins in the gas block, the gas tube pin, cut the delta ring, remove the springs, and cut the retainer.



cut the bayo lug off, sling attachment, sight posts, and grind down any extra material



painted it with high temp bbq paint and reinstalled



yesterday i stopped by Rainier Arms shop and bought one of their Evo series rails.





i have yet to shoot it, but i like the feel much better than the MI quad rail. the whole project was super easy too!