Tango Uniform Echo Zulu Castle Nut Armorer’s Kit
Tango Uniform Echo Zulu Castle Nut Armorer’s Kit
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Stake your AR’s castle nuts faster & more consistently with Tango Uniform’s new Echo Zulu Castle Nut System.
This Armorer’s Kit Includes: one EZ castle nut, a steel armorer’s wrench, a bi-directional staking guide, and a spring loaded, straight-wall center punch.
The patent pending EZ castle nut is made from premium 4140 PH alloy steel and finished in long duration, diamond hard black nitride. It was precision machined on a modern Swiss CNC lathe, to tolerances that meet or exceed the mil-spec TDP, including true class 3 threads. The EZ castle nut features eight co-linear wrench & staking notches, allowing for easier visual alignment, and multiple staking locations with even the largest end plates.
The Armorer's Wrench is precision machined from 4140 alloy steel, heat treated to over 50 Rc, and finished in black oxide to preserve that hardness. This premium tool features a 1/2-inch square drive socket with the same center-to-center distance as a USGI castle nut wrench, so your favorite torque wrench will apply the proper 38-42 FT# when torquing down castle nuts.
The bi-directional staking guide is injection molded from premium glass-filled nylon for enhanced durability. Its small, symmetrical design allows it to index around most QD end plate designs.
The included premium spring loaded center punch features a large, injection molded comfort grip and the knurl textured body has a chrome plated finish for a long-life. The staking punch has a straight-wall design so it won’t tilt inside a precision staking guide. The punch is made from 17-4 stainless steel and finished in long duration, diamond hard black nitride.
The straight-wall staking punch and precision staking guide work in tandem with the unique EZ castle nut design, allowing for strong, consistent staking with minimal risk of damaging other components.
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Let customers speak for us
from 51 reviewsNothing but the best.
Wow! I'm so glad I was able to grab the last SOCOM profile 14.5 A5 barrel available for now. IMO the fit and the finish is top notch and can't be matched.
I shot nice thight groups out to 100m... so, I can't complain. Looking back, I wish, I could have gotten at least one more barrel for a future A5 project.
Alan Taylor
Dallas, Texas
Very high quality barrel. I would consider this to be as good if not better than the hk made barrels. The chrome lining is excellent and the overall fit and finish is top class. Very smooth shooting would definitely recommend if you are wanting to build a clone or just looking for a high quality cold hammer forged chrome line barrel.
Just got it last Friday so I haven't shot it yet. I purchased the barrel and had Marvin install it on an MR556A4 upper. The work looks really good (no little nicks or anything), the barrel itself is well-made and it's nice seeing a chrome-lined barrel on an HK MR carbine! Would definitely recommend Marvin's work as well as NA for offering us "civvies" a mil-spec barrel. Kudos!
P.S.- Holly answers the phones there and she was very helpful and polite. You all have a solid employee!
Very high quality and definitely adds pressure to the system.
Excellent option for the MR556A4 and 416 clones.
Marvin and his products are top notch. Perfect fitment, excellent quality. These are the best barrels outside fo factory HK that one can buy!
For your barrel nut torquing a must have precision made tool. Excellent machined quality to use on a number of AR , KAC , Centurion Arms or HK variants.
Nicer than other popular and similar tools I have. protect your barrel extension index pin! Get one!