Spike's Tactical 5.56 M16 Cut AR-15 Bolt Carrier Group

Manufactured by Spike's Tactical
Manufactured by Spike's Tactical
100 Reviews

In Stock

Standard orders will ship out in 1 business days or less if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Your bolt carrier group is one of the most critical parts of your build. Don't buy an imitation. This is the same BCG Spike’s uses on their builds. These complete bolt carrier groups come magnetic particle inspected and high pressure tested. The carrier is made from 8620 steel and the bolt from no. 158 carpenter steel or 9310 depending on supply. The gas key is properly staked, the extractor spring has been upgraded with an O-ring for increased tension, and all surfaces are MIL-SPEC heavy phosphate coated or internally chrome lined. The Spike's Tactical Spider Logo is engraved on the right side of the carrier to show through the ejection port. Assembled BCG weighs 11.6 oz.


  • Firing pin with hard chrome finish.
  • Cam pin phosphate finish.
  • Retaining pin.

Bolt carrier:
  • 8620 tool steel.
  • Full Auto/M16 cut.

  • 158 carpenter steel or 9310 depending on supply
  • Shot peened.
  • High pressure tested.
  • Magnetic particle inspected.

  • 8620 tool steel.
  • Phosphate finish.
  • Extractor spring.
  • Black extractor insert.
  • Viton O-Ring.

Gas key:
  • 8620 tool steel.
  • Grade 8 hardware.
  • Properly staked.
  • Chrome interior.
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Bolt FinishManganese Phosphate
BrandSpike's Tactical
Caliber Gauge5.56 NATO
Carrier FinishManganese Phosphate
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
Manufacturer.Spike's Tactical
Weight11.6 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Spikes BCG


My new BCG functions flawlessly. Always excellent service from Primary Arms. Big thank you to PA.Other retailers should take note of PA cause thats how it's done boys!

spikes bcg


pretty standard bcg. good quality, no tool marks. cools spider logo hahaha

Spikes BCG


Spikes quality product + Primary Arms OUTSTANDING Customer Service = Happy Customer. NO one Ships Faster than Primary Arms! Shout Out to Phil for all your help! Thank You.

Spike's tactical


Doing my first build and this came up as a "black Friday" deal. Wow!

works great!


Another excellent Spikes product!

Can't beat this BCG


Haven't seen a recent review on this so i thought I'd put up my own. I gotta say, this is an awesome BCG! Works flawlessly with the ammo I've used, i mostly shoot Federal 55 gr and X-TAC 62 gr. Utilizing an AR Stoner barrel and Core15 upper, this BCG run perfectly. So far, about 400 rds down range, and this Spikes BCG has not failed me yet. The only thing is when you first get it the ejector pin is very stiff and needs a little break-in but other than that its G2G. Like it so much, my 2nd one is already in the mail for my next build.


by -

Flawless finish and fit. Never disappointed in Spikes components.

Primary arms is just awesome!


I love primary arms, best delivery times. Order one day get the next. Wow. This BCG looks great and is smooth. No worries. It functions perfect, thank you.



Bought this BCG after reading the large number of positive reviews hoping to get an awesome BCG that would withstand the test of time. Well it lasted alright 2 rounds. The very first round cycled just fine but after being fired and ejecting the problems began occurring. The spent casing ejected and as the bolt picked up the next round out of the magazine the seat of the round appeared to fail to seat properly in the bolt and the round only made it about halfway into the chamber before jamming. This continued until I thought I saw what the problem was. I could see that the bolt wasn't picking up the round correctly as the lip of the case was partially sitting off to the side of the ejector. I used my pocket knife to hit the round over more in line with the chamber. As I did this the bolt was then successfully able to seat the round in the chamber. However this problem persisted with an entire 20 rounds loaded into a standard Magpul Pmag. Believing the problem to strictly be the BCG and nothing more I swapped the Spikes Tactical with a Bear Creek BCG that I had in a separate upper. Low and behold no more problems. The gun cycled flawless through many more mags. I will be contacting Primary Arms and asking for a refund as this is unacceptable. This was a brand new out of the box BCG that just flat out had issues. The Bear Creek was new as well so this had nothing to do with a ''break-in'' period. This was an every round issue aside from when I would manually pull back the charging handle and send it home. I'd read in a separate review on Brownell's that Spikes had possibly stopped building their BCGs in the USA so this may be the issue. I've always heard good things about Spikes Tactical so I'm hoping that I just happened to get a lemon and that this is not a continuous problem that others are seeing. FYI for informational purposes the rifle I was using was an Anderson Arms lower with a BCM parts kit carbine buffer tube and an Anderson Arms upper receiver with a mid length gas system. Ammunition was American Eagle 55 grain FMJ.

Good BCG


Spikes Tactical comes through for me . I bought this BCG for my DPMS ORICAL because the original one was not mil spec. I also installed an a H1 buffer . I went to the rang over the weekend and she functioned flawlessly . I fired about 200 rounds of assorted ammo . I shot Wolf tula American eagle Perfecta 62 grain 5.56 NATO tracer rounds and 62 grain 5.56 penatrator rounds. I used Weapon Shield gun oil in and on the Bolt and carrier . I did clean and work the bolt in and out of the carrier a few time as it was pretty stiff on arrival . After I cleaned and worked the bolt I could flic it out . One thing I had to do was center up the roll pin for the ejector was sticking out ever so slightly. I am very happy with this BCG and highly recommend it !! BTW my DPMS is driving tacks !