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.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
.223/5.56 Bolt/Carrier, Nickel-Boron
None
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SPIKES TACTICAL - .223/5.56 Bolt/Carrier, Nickel-Boron

15 Reviews
.223/5.56 Bolt/Carrier, Nickel-Boron
Brownells #
100008575
MFR #
ST5BG03
UPC
855319005501
$224.99
Coupon Code
Purchase Limit Help

Out of Stock

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Specifications
Carrier Type:
M16
Cartridge:
5.56x45 NATO
Color:
Silver
Finish:
Nickel-Boron
Make Model Fit:
AR-15.Universal
Restriction
Restricted Part:
Yes
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What is the SPIKES TACTICAL - .223/5.56 Bolt/Carrier, Nickel-Boron?

Matched bolt/carrier set is machined to mil-spec dimensions using the latest manufacturing and quality-control techniques to deliver superb reliability in both semi-auto and select-fire rifles. Carrier is hard-chromed inside and has an M16-type full-length shroud on the underside to trip the auto sear on full-auto/burst rifles. Bolt is magnetic particle inspected to ensure there are no internal flaws to compromise structural integrity and cause premature failure. Fully staked carrier key and tool steel extractor further aid reliable cycling. Laser-engraved Spike’s Tactical logo on the side of the carrier is visible when the ejection port door is open. .223/5.56 fits standard AR-15/M16/M4 rifles and is available with a FailZero EXO™ nickel-boron coating that’s smoother and slicker than hard-chrome for reduced friction and superb wear-resistance in high-intensity applications.


PECS: Bolt – Carpenter 158 steel alloy. Carrier – 8620 carbon steel, chrome lined. Available with FailZero EXO nickel-boron coating, silver finish.


See all of our AR15s and AR15 parts here.

Restricted Part
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M16 5.56 NICKEL BORRON BOLT CARRIER GROUP REVIEWS

4.1
15 Reviews
5 Stars
67%
4 Stars
7%
3 Stars
13%
2 Stars
0%
1 Stars
13%
Reviews Summary
Customers have mixed feelings about the M16 Nickel Boron BCG. While some praise its performance and low maintenance, others report issues with quality control, including damaged parts and headspace problems. Overall, many agree on its durability and smooth operation once functioning correctly, but concerns about consistency and inspection remain.
What Reviewers Are Saying
Product Quality
50%
Several reviews highlight concerns over the product's quality control, particularly mentioning issues like damaged components and variance in bolt specifications. While many praised the overall construction, discrepancies were noted, suggesting inconsistency in the manufacturing process.
Performance
65%
Reviewers generally commend the BCG's performance once functioning correctly, noting that it runs smoothly and requires minimal lubrication. Many mentioned the improved cycling and reliability over standard phosphate BCGs, particularly for extended shooting without cleaning.
Maintenance and Cleaning
55%
Multiple users appreciated how easy it is to clean the Nickel Boron BCG compared to other types. Some noted that minimal cleaning is needed after many rounds, with one user reporting the BCG wiped clean easily without solvent, making it a convenient option for heavy use.
Value for Money
45%
While some acknowledge the higher price point of this BCG compared to other brands, many believe the additional cost is justified by its performance and durability. However, there are sentiments that for cost-sensitive buyers, other reputable brands may offer better value.
Fit and Compatibility
35%
Several reviewers expressed compatibility issues with specific older models and remarked on dimensional differences between this BCG and others they owned. This led some to question its fit in certain setups, indicating potential concerns for buyers with older firearms.
5
Smooth as silk !
Best BCG I have found. Own several in various rifles from 20" to 11". Flawless.
Would you recommend this? Yes, I would recommend to a friend
5
No more made in the USA
Great BCG however the one I own has to be going on 7 years ago. Mine has a milled made in USA on it. I plan on getting another one because out of ALLLL the BCG’s I own. The Spikes nickel boron coated bcg ran the absolute best with the trigger I picked up. Like it went together so well it was as if they were designed together. Kinda crazy that I decided 8 years ago to use Spikes to do my first ever build. And now I’m coming back to build another one that will make the truest patriots giggle every time they lightly squeeze the trigger.
Would you recommend this? Yes, I would recommend to a friend
5
Tested and Approved
I bought a couple of these to test out for a couple builds that I was doing. I have to say that they are far better then the PSA NB BCG and right up there with the wilson combat ones. I have beaten the this BCG in full auto without issue. Buy this one.
5
Slick and Reliable
I will eventually put this unit on my other two work M4's. Without lubbing, I can shoot far longer with this BCG. In the event that I have to, it is nice to know I do not have to wet the weapon as frequently. I have used this with great success with Colt, Spike, and Palmetto carbines. Sure, it's about double what a regular BCG cost but that is nothing compared to the peace of mind I have knowing I can extend shooting well beyond the norm.
5
Great BCG With Silky Smooth Operation
I specifically ordered this bolt carrier group to review for my blog fans and followers. While building my VLTOR SBR, I was looking for a very high quality bolt carrier group to use for the build. I was looking for something special for this build and I definitely found it in the Spike's Tactical Nickel Boron BCG. Since Spike's Tactical is located only about an hour from my house, I had already owned several of their products. From rifles, to accessories Spike's seemed to nail it every time. Thus far, I have not found a Spike's Tactical product that has not worked flawlessly or that I didn't like. After hearing only positive things about the Nickel Boron coating, I decided to order one here from Brownells. When it arrived, I have to say that I was immediately impressed. The BCG was packaged very well in a clear plastic tube bearing the Spike's Tactical logo. When I removed the BCG from the tube, honestly I didn't know what to think at first. This was my first encounter with anything coated with Nickel Boron, so the surface texture was a bit strange at first. It almost felt as though it was coated in some sort of plastic. It was very smooth to the touch and had a very appealing look. I was also impressed to find that everything part on the BCG (minus the firing pin) was coated. Not only the outside of the BCG, but the inside the BCG and bolt itself. Initial inspection revealed that the gas key was perfectly staked. No issues with the key coming loose on this BCG! Everything was just as I have come to expect from Spike's Tactical. After marveling over it for a few minutes, I placed it into the receiver of my SBR. Not only did it look awesome, but it functioned flawlessly. It's hard to explain, but the Nickel Boron BCG seemed a lot smoother than the other standard phosphate coated BCG's I was running in my other rifle. And yes, I did compare them all to see if there really was a difference. I was impressed to find that the Spike's Nickel Boron Carrier is constructed of 8620 tool steel and that the bolt itself of 158 Carpenter steel. And of course, all coated with the Nickel Boron for extreme resistance to corrosion. So no more worries when firing corrosive primers often found in some steel cased ammo. One thing I noticed that was not advertised about this BCG when I ordered was how easily it cleans. For my first time out with the SBR, I fired about 500-600 rounds of Federal 55 grain ammunition. Although I don't necessarily find this ammunition to be "dirty", it stills produces that common powder and carbon build up associated with shooting in general. After this specific range trip, I was pleased to find that when I got home, the BCG simply wiped clean. I used an old t-shirt and no solvent or oil of any kind. And to be quite honest, there wasn't much carbon or powder residue found on the bolt anyways. Much cleaner than a standard phosphate coated BCGs. I was dreading having to scrape off the carbon, but was excited to find that it was not needed. Since then I have well surpassed 1,500 rounds and still have not had any issues with this BCG. I recently used it in my SBR last weekend at a local 2 gun match. The bolt functioned flawlessly and ran smooth as a baby's bum. Several people at the matched asked what I thought. Let's just say that a few of them may be making the switch over soon enough! Because the Spike's Nickel Boron BCG is advertised as self-lubricating, I have decided to never oil or lubricate this bolt. I will wipe it down of course when required, but I want to see how long she'll run without ever using lube/oil. I have run this BCG completely dry since day one and its still performing flawlessly. One other thing that I noticed about this BCG as compared to others, is that it does not get as hot after a lot of firing like a phosphate coated BCG. You can literally remove this BCG after a mag dump and it will be warm, but not hot. Not only does it stay cooler, but cools faster after a lot of shooting. The Nickel Boron really holds its own. Because I built my SBR to be my SHTF rifle, I am glad that I ordered this BCGminimal cleaning, no lubrication, flawless functioning, all things that can make a SHTF scenario easier to deal with. I did notice that the Nickel Boron BCG seems to weigh a little more than your standard phosphate. However, this was good for me because I was able to use a heavier buffer than in my other rifles. So in reality, the weight change (which was minimal anyways) was not an issue. I would highly recommend this to any AR-15 enthusiast or for anyone looking for a reliable part for their SHTF rifle. I would definitely consider this BCG to be an upgrade to your AR-15. Get this bolt and you will not be disappointed!! Have fun, be safe and shoot on! -Michael Sapp
Customer Questions
1 Question