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AR build in MA. Now AR-9!

Soundwave said:
Bipod arriving tomorrow for AR-10. Now I'm looking at weapon lights. The cloud defense rein 3.0 style seems like it would work. $400 seems a little steep though. With the bipod up up front I'll probably mount light on side rail and pressure switch up top? This would be for the AR-15 not AR-10.
Click to expand...
i use rechargeable olights just because they use same cord for any of its lights so i do not have to get into a mental stupor on what device got what cord and where to find it.
 
Finally got the AR-10 over to a longer range. After dialing it in at 200y I was consistently breaking clay pigeons. I could reliably hit gongs and torso sized stuff at the next two distances (300y-400y?) by using the 1 and 2 on scope reticle. I couldn't really hit a steel goat out a little further though. Should I be aiming low at 400 when zeroed for 200?
 
Soundwave said:
Finally got the AR-10 over to a longer range. After dialing it in at 200y I was consistently breaking clay pigeons. I could reliably hit gongs and torso sized stuff at the next two distances (300y-400y?) by using the 1 and 2 on scope reticle. I couldn't really hit a steel goat out a little further though. Should I be aiming low at 400 when zeroed for 200?
Click to expand...
Here is your reticle dop for 175gr load, at 10x magnification.
target above represents 100yds distance. i forgot to remove wind, so it is a bit to the left.
894AA601-F94C-4830-8B34-E8D1DF0E8C9E.png
 
Last edited:
A 100 yard zero would hold you about 0.6 up at 200 and 2.3 at 400
Assuming your TenMile is MRad

With a 200 zero, you’d be about 1.6 high based on my app adjustments.
168gr with 2700ft/s
Before:
CA703838-9BB1-4534-8ABB-E8D4F9D8280D.png

After
01098FC3-973A-4DA5-BB8B-48F48E753291.png
 
So I just sent in for the stamp to build my AR-9 SBR. Aero EPC lower and 8.3in upper with atlas s-one handguard. Trying to make the recoil impulse better from the get go. Has anyone used the JP BCG and captured spring in a similar setup?
 
Ordered a taccom adjustable 9mm buffer setup and their extreme BCG. I'm probably just going with the regular EPC LPK. Macon armory offers an improved magazine release for EPC-9. I'll see if it's needed with their new barrel design.

I'm thinking of going all Daniel defense furniture. Not sure if I want a vertical foregrip or some sort of hand stop yet.
 
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Parts are all ordered and only waiting on a few more. Stamp will follow shortly after hopefully.

Aero EPC 8.3" upper w/ atlas s-one 7.5"
handguard
Aero EPC-9 Glock mag lower
Aero lower parts kit
Aero carbine buffer tube
Taccom Extreme short-stroke
BCG at we
Taccom adjustable buffer system
Radian Raptor-SL charging handle
Radian Competition red anodized ambi
safety
Macon armory improved EPC mag
catch/release
CMMG zeroed linear comp
Daniel defense furniture

Supposedly the new Epc-9 feed cone works well. The Macon mag catch is supposed to allow the mag to seat higher to help feeding. Should be no problems there.
I went back and forth on buffer systems but ended up with this one because it is adjustable and comes as a complete set. The special BCG is supposed to allow for short stroking while keeping LRBHO function.
 
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Holosun SCRS has finally shipped after ordering back in April!

Sight performed great. Before heading to the range I noticed the buffer seemed to be loose!? The castle nut was loose somehow. I guess the shop I paid to assemble while I waited didn't do a great job... then at the range the velocity trigger shoe started to come loose! Trigger was twisting and wouldn't reset properly. Seems fine now after tightening but I need a vise to really tighten castle nut.
Mags were dropping free and the BCG was locking back on last round so everything else is working great.
 
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So my Modlite PDW came in and ofcourse its a little too tall for the SCRS. I'm going to look into a slightly higher mount. More concerning is that when I laid the rifle on its side the two trigger pins just fell out!? I believe this trigger is a while drop in assembly with extra pins and retaining screws to secure everything. The shop that assembled this truly did a horrible job.
 
Soundwave said:
So my Modlite PDW came in and ofcourse its a little too tall for the SCRS. I'm going to look into a slightly higher mount. More concerning is that when I laid the rifle on its side the two trigger pins just fell out!? I believe this trigger is a while drop in assembly with extra pins and retaining screws to secure everything. The shop that assembled this truly did a horrible job.
Click to expand...

Are you putting the Modlite at 12 o'clock under the Holosun? Maybe a 45* pic to pic rail adapter?
 
Soundwave said:
So my Modlite PDW came in and ofcourse its a little too tall for the SCRS. I'm going to look into a slightly higher mount. More concerning is that when I laid the rifle on its side the two trigger pins just fell out!? I believe this trigger is a while drop in assembly with extra pins and retaining screws to secure everything. The shop that assembled this truly did a horrible job.
Click to expand...
Install KNS AntiWalk pins. Fast and easy.
 
Soundwave said:
believe this trigger is a while drop in assembly with extra pins
Click to expand...
any drop in trigger body has screws that need to tightened - if pins fell out - it means it was not done - either bolts are missing, or, something else got screwed.
you do not use anti-walk pins with such triggers. plus if those bolts are not tightened - trigger will malfunction.
get the trigger out and observe. an every single drop in solid body trigger has such screws.


View: https://youtu.be/lCOKkJf31fU?feature=shared&t=384
 
paul73 said:
any drop in trigger body has screws that need to tightened - if pins fell out - it means it was not done - either bolts are missing, or, something else got screwed.
you do not use anti-walk pins with such triggers. plus if those bolts are not tightened - trigger will malfunction.
get the trigger out and observe. an every single drop in solid body trigger has such screws.


View: https://youtu.be/lCOKkJf31fU?feature=shared&t=384
Click to expand...

I plan to take a closer look inside tonight when I get home. I ordered a cheap set of wilson combat anti-walk pins as well.
Ordered a magpul polymer offset m-lok to rail adapter for the modlite. If I don't like the positioning I'll pony up foe the reptilia mount.
 
Soundwave said:
I plan to take a closer look inside tonight when I get home. I ordered a cheap set of wilson combat anti-walk pins as well.
Ordered a magpul polymer offset m-lok to rail adapter for the modlite. If I don't like the positioning I'll pony up foe the reptilia mount.
Click to expand...
anti-walk pins will not prevent trigger body from wobbling inside and it will be problematic, so, you'll need to figure out of what is the deal there.
 
paul73 said:
kinda good visual illustration behind a reason for a simple enough advice - 'buy aero'.
Click to expand...
This build is all aero with a factory 8.3 upper. Taccom extreme BCG and adjustable buffer. I did splurge on the fancy velocity trigger though. The set screws needed a lot of tightening and I don't even think there is an additional small screw above to secure them as shown in a few videos. I have a few things on order but ofcourse I forgot the oversized bolt catch...
 

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