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Just put together my Crypto build with the help of this thread. Only had time to test fire a handful of rounds but it functioned well and didn't blow up in my hands so I take that as a win considering it's the first rifle I ever built. Parts list below (does not include cost of shipping, or equipment/supplies required to put together the build:

The Build

Receiver set - $999.99 (RDSC)
Rainer Arms Match Grade BCG Nitride - $279.99 (RDSC)
Rainer Arms Buffer Tube Kit 7075 Mil Spec - $109.99 (RDSC)
Strike Industries Enhanced Ultimate Dust Cover - $24.99 (RDSC)
Ballistic Advantage 18.6“ Hanson Barrel with Lo Pro Gas Block, Mid Length- $359.95 (SGW)
Aero Lower Parts Kit - $59.95 (SGW)
Aero Melanite Mid Length Gas Tube - $29.95
Aero Bird Cage Flash Hider - $18.95
Aero Crush Washer - $7.95 (I forgot to order but SGW threw it in my order for free)
TNA Anti Walk Trigger Pins - $7.93 (TNA)
Trigger Tech Duty Trigger Single Stage 3.5 lbs - $169.99 (TNA)
Magpul MOE SL Grip - $27.99 (TNA)
Super M Lok 13.5” Handguard with barrel nut - $149.07 (TNA)
Magpul SL Carbine Stock - $88.99 (TNA)
BCM Gunfighter Mod3b charging handle (non-ambi): $69.99 (Wolverine Supplies)

TOTAL (if my math is correct): $2405.67+tax

Other

Bushnell AR 1-6x LVPO with illuminated reticle $349.99 (TNA, purchased over a year ago)
Weaver Premium MSR Mount - $109.99 (Tenda)
That is one sweet rig, pretty much exactly what I want to build.
Just curious, what is the total weight of your rifle?
 
Thanks man. It’s not the lightest rig out there, but not bad. Just under 9lbs with optic and unloaded magazine.
Thats not to bad. I'd love to hear how that BA barrel shoots when you get out with it.
I'm hoping it can hold some decent groups, that is the barrel I'm planning on getting.
 
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- Lantac Enhanced BCG
- IBI 19” MS profile barrel
- IBI low-profile .936 gas block
- IBI rifle length gas tube
- Knock-off VG6 Epsilon 556 brake (I love this brake)
- Radian Raptor charging handle
- Armaspec SRS-H2 buffer system
- TNA Coronus 17” handguard
- Strike Industries ultimate dust cover
- Magpul B.A.D lever
- Triggertech ambi safety
- Triggertech Diamond trigger
- Magpul MOE-SL stock
- Magpul K2+ grip
- Magpul M-LOK handstop
- Atibal XP6 FFP 1-6 scope + Atibal TPM mount
- Generic lower parts I had laying around

Just finished the build a day ago, have had most of these parts for over 4 years since my fully-purchased ATRS MS got court-ordered to not ship to me...
Haven't test fired yet. Hopefully the gas/buffer doesn't need tweaking with the H2 buffer, since there's definitely no room for an adjustable block. But we'll see.
Nice rig! Any issues fitting the B.A.D. lever?
 
Anyone else think the material around the bolt catch pin is a bit “sparse”?
I would say it definitely looks a little thinner than other receivers I've seen. But being that it's just a holding point for a pivot pin, and there is still over 50% of the pin diameter of material on either side, I'm not overly concerned.
can anyone confirm that the magpul dust cover fits?
If it's a dustcover for an AR-15, it should fit. The only modification you may need to do is take a small round file and remove some material on the inner part of the upper where the spring-detent latches, as it seems common people have found there's too much material there to have reliable retention while closed without doing so.
 
I would say it definitely looks a little thinner than other receivers I've seen. But being that it's just a holding point for a pivot pin, and there is still over 50% of the pin diameter of material on either side, I'm not overly concerned.

If it's a dustcover for an AR-15, it should fit. The only modification you may need to do is take a small round file and remove some material on the inner part of the upper where the spring-detent latches, as it seems common people have found there's too much material there to have reliable retention while closed without doing so.
 
Anybody know where I could get an Ejection port cover and a CH?
From someone who still ships?
 
Hey do anybody have an hyper fire elite installed? Jus wondering if I need to install the toggle yoke?

And question 2
My aero precision bolt catch/release don’t line up perfectly, one or the other is out of spec.
As you can see in the picture it needs to move forward about a 1/16 of an inch.
I can get it in there but it gets jammed up.
I could remove some material off of the rear of it maybe?
 

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A few days ago, I decided to upgrade my firearm setup by installing the Precision Armament Hypertap muzzle brake (5.56; 1/2x28; slim body). Huge shoutout to the gunsmith team at RVS for their expertise and support during this process—they were absolutely fantastic.

Here’s what happened:
When I first purchased my firearm (Crypto), the original flash hider was completely loose. The folks at FOC tightened it properly at the time, but when I later tried to remove it, it was impossible to unscrew on my own. That’s where RVS came in.

When they removed the original flash hider, we hit an unexpected snag. The new muzzle brake only threaded about one to one-and-a-half rotations before completely stopping. We double-checked the specs and thread compatibility—everything matched. It turns out the issue likely stemmed from excessive anodizing on the barrel threads during manufacturing, making it difficult to mount the brake.

Thanks to the skill and persistence of the RVS team, they managed to fully thread both the nut and the brake. However, there’s now a 2.5mm gap between the nut and the brake.

Here’s the big question: Is it safe to shoot in this condition?

  • Should the nut be tightened flush against the brake, or is leaving it as-is acceptable?
  • The brake itself is securely tightened and will be extremely difficult to remove.
I’d love to hear your insights and advice!

Again, a huge thanks to the RVS gunsmiths for their outstanding work on what turned out to be far from a straightforward installation.

Looking forward to your suggestions!


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