Build a complete AR-15 using the stripped lower linked in the OP for $35 plus the following parts:

• Delta Team Tactical Rifle Build Kit (minus BCG, mag, and sights) - $235 shipped (free domestic shipping on orders over $120)
  
  
• BCA 5.56 BCG from Primary Arms - $70
  
  
• Magpul M3 30-rd PMAG from Primary Arms - $10
  
  
• Shipping on the lower, BCG, and mag from PA - $7.50
  
  
• Budget Amazon Red Dot that doesn't seem too shabby - $23 shipped with Prime
  
  Total: $380.50 shipped for an AR15
  
  This isn't gonna be a nice AR by any means and in fact I expect it to come out looking pretty butt ugly, but it is an AR, and I would expect it to go pew if you assemble it correctly. Good luck!
  
  Edit: The barrel in this build kit looks like it is a fluted, heavy, stainless 416R Bear Creek Arsenal barrel that sells for $95 on their website. It is the "better" 416R steel, according to their specs, and it is .223 Wylde with a 1:8" twist, so that combined with the free-floated handguard and you might actually be able to expect pretty decent groups.
  
  

  Final Edit - 5/9/17 10:30 AM EDT
  

  
  Lower receiver marked back up to $45 making this a $390.50 complete AR now. Deal marked NSFW as it no longer reflects the title price.

The gat is obviously a Real Sword Type 97B. The red dot is this cheap one and the bungee sling is this one. The suppressor is a foam filled one I picked up for cheap from a local guy, not sure exactly what the brand is. It does have HK trademarks though

The trigger contacts on the CM18 will wear out sooner or later on an 11.1v lipo because it has no mosfet. Get a 7.4v lipo or 9.6v nimh.

You can get cheaper batteries on Hobbyking. I'd also recommend the Imax B6AC charger. It's just a great charger that can do whatever you need.

6mmproshop mags are shit. PTS EPMs, G&P High RPS, and Ares Amoeba mid caps worked in me and my brother's G&Gs.

Those Edge goggles have no impact ratings. Avoid them. Valken goggles are rebranded Pyramex or their in-house garbage. Pyramex I-force are fantastic for the price. Lower face protection, like a One Tigris mask would be a good idea as well.

Those red dots are shit. If you really want a red dot the Field Sport micro dot are pretty good for the price. You'll definitely want a riser

I'm not entirely all that knowledgeable but AFAIK, if you're going to go for a replica sight, T1 replica's seem to be less shitty.
I've seen many positive reviews on the Field sport T1 style sight.

OK so it came in on Thursday but I just had a chance to try it out today.

I'd say it's definitely worth the money, but it isn't one of those things where you're getting a $250+ gun for $120.

The FPS is obviously really high on this thing. With just a little hop up added it shoots Elite Force bio .25s a really long way with no drop. However, accuracy is not fantastic. I set up a target at 35' and I could get 4" groupings consistently, but not 2" groupings. For comparison I can get 2" groups with my KWA SR7 and my Classic Army EC1 nearly every time at that range. Of course, this is straight out of the box, so it may improve over time. As it is it's not terrible, just not insanely great.

For what it's worth, this is the loudest Airsoft gun I have ever used. You can't hear any motor whine or spring noise, just a loud BAM for every shot.

Build quality is excellent. It's really hefty, nothing rattles, and it just feels incredibly solid. The rail on top is metal, and it holds optics with no wobble. I got a little $25 Amazon red-dot for it and it works fine.

Magazine capacity is small, the midcap it comes with and the extra one I got on Evike both hold 68 rounds (on paper, I think in reality you get ~50 rounds before it becomes too difficult for a speedloader to insert BBs).

I think the downfall with this thing is that it's not a super accurate gun for field play, but its FPS is much too high for CQB. I think with a spring replacement to take it down to 350fps it would be a fantastic CQB gun.

Pic

Wore that mask for 2 games before relegating it to loaner status. OneTigris-style masks are more way more compatible with goggles and allow a cheekweld. Those shooting glasses look like they would be better than goggles, but if they're anything like the pair I used they'll fog like crazy. Your eye-pro not being the best place to save money, I reccommend something ANSI Z87-rated with good ventilation slots around the edges. ESS goggles are a traditional standby for this. I'd reccomend this Aimpoint T1 clone instead of the one you show, as it's more durable, lower profile, can co-witness with M4 iron sights with the right mount, and is less likely to catch BBs. What are you going to carry your magazines in?

There is a couple torture tested of this red dot on YouTube and they beat the shit out of it and it kept running.

Edit: wrong link, fixing now.

Torture test

I think u/ChadPoland is right. It looks like the Field Sports other version that has both Green and Red. Thats why some of the photos the numbers are green and other photo they are red.

https://www.amazon.com/Field-Sport-Green-Micro-Sight/dp/B00D4AYBR6/ref=pd_sim_200_15?_encoding=UTF8&pd_rd_i=B00D4AYBR6&pd_rd_r=NZZMZ1Z1W8FDBSXCVV9A&pd_rd_w=Fcg3L&pd_rd_wg=Yflnh&psc=1&refRID=NZZMZ1Z1W8FDBSXCVV9A


There are lots of factories in China that you can order from and they will put your company name on it.
If I remember correctly Primary arms works with one to make theirs at a higher standard / better features (emitter placement for example).

I seriously doubt this is actually a Primary Arms.

Are you going to intentionally use this rifle to defend yourself? If so, you're looking at about $150 minimum for a RDS (IMO). My personal recommendation is the Vortex Sparc AR or Sparc II. Others like the Holosuns, but I don't have experience with them.

That said, if the worst thing that happens is a range trip cut short, you can grab a Fieldsport RDS and UTG riser from Amazon for about $30.

https://www.amazon.com/Field-Sport-Green-Micro-Sight/dp/B00D4AYBR6/ref=sr_1_6?s=sports-and-fitness&ie=UTF8&qid=1494339103&sr=1-6&keywords=Red+dot

https://www.amazon.com/UTG-super-Picatinny-Riser-Mount/dp/B01BI0I9AS/ref=sr_1_15?s=sporting-goods&ie=UTF8&qid=1494339182&sr=1-15&keywords=Picatinny+riser

The Fieldsport is the best cheap plinker optic I've used (I bought one to see what the fuss was about). I still wouldn't trust my life to it, but I wouldn't hesitate to throw it on a budget rifle.

To boot, if you'll catch a set of Magpul MBUS on sale for about $60, you can have a surprisingly reasonable setup for around $100. And if the dot ever failed, you'd have a quality set of backup sights to use.

Add: I confused your OP with another and just saw you looking for a scope. My thoughts still stand on the RDS.

The Bushnell Drop Zone gets a fair amount of love. But keep in mind, you'll be spending at least another $30 (preferably more like $60+) on a scope mount.

If you prefer crosshairs to red dots and aren't looking for magnification, Vortex makes a 1x scope meant for muzzleloaders. I'm running one on my 7.62x39 AR and really like it. To boot, you can find them for around $60 and they're every bit as quality as their other Crossfire II optics. You'll still need a mount, though. Aero has their ultralight offsets on sale for around $60. That's the way I'd go for any scope you end up with. The Vortex offset mount I picked up is friggin' heavy.

field sport

ABB red dot

which is just the field sport on a qd mount

said red dot taking a beating

Its good enough for real steel good enough for airsoft and if it breaks your heart isn't gonna be sore

https://www.amazon.com/Field-Sport-Green-Micro-Sight/dp/B00D4AYBR6

It performed great. I oiled it a bit before a went so I didn't have any jams or other issues going through 100 rounds.

I zeroed it in at 50 yards. And after I got used to it, my groupings were getting pretty solid.

Model: Adams Arms -16" Carbine

Site: Field Sport Red and Green Micro Dot Sigh w/ a 0.83" riser mount

I have this one. For 20 bucks it's been great.

T1 Repro

For cheapness you can get a Fieldsport Micro Dot from amazon for $20 and a UTG Riser Mount. I do not recommend using these sights without a riser.

If you want to spend some actual cash on a really good optic I recommend either a primary arms T1 and riser or a [Holosun] (https://www.amazon.com/dp/B00NC1G0KI/ref=dp_cerb_2). Dutch uses a Primary Arms but IMO the holosun is probably the best budget real steel optic on the market.

Field Sport Red and Green Micro Dot Sight https://www.amazon.com/dp/B00D4AYBR6/ref=cm_sw_r_cp_apa_U5kKzbQ2ZA980

its $20 and i've been running this for a few months now and its durable and rugged.

https://www.amazon.com/dp/B00D4AYBR6/ref=cm_sw_r_cp_awdb_ro3azbFSFB2Y5

[field sport red dot](Field Sport Red and Green Micro Dot Sight https://www.amazon.com/dp/B00D4AYBR6/ref=cm_sw_r_cp_api_h5qgzbARRBQED)

If it works, then it works.

Essentials:

G&G Firehawk

2x Battery

Charger

Eye protection

Mouth protection

Extra's:

Extra magazine

Red dot

Silencer seems pretty stupid on a stubby gun, but if you really want one go ahead and take whichever one you like. The G&G Firehawk is a solid starter CQB gun with a very nice sound + ROF. I'd stay away from those starter package, those are just some sales talk to get rid of their shittiest options.