Spike's vs BCM: AR-15 brands compared

BCM leads in 5 of 6 categories.

BCM for upper receivers, bolt carrier groups and buffer tubes.

From tens of thousands of real builds and live prices at 30+ retailers.

Our take

Spike's is best for:

Spike's Tactical makes AR rifles, uppers, lowers and parts in Florida, with the Spider logo on the lowers. The T3 tungsten buffer is one of their most known parts.

Lifetime warranty · Forged lowers · Tungsten buffers

  • Close to average prices

BCM is best for:

BCM makes mil-spec AR uppers, barrels and bolt carriers, and it test fires every complete upper and bolt carrier group before it ships.

Mil-spec parts · Test fired uppers · Chrome lined barrels · Veteran founded

  • Paying more: about 24% above average
  • The more popular pick: in 37% of builds
  • Upper receivers, picked 5x as often
  • Bolt carrier groups, picked 6x as often

Many builders mix them: 40% of Spike's builds add BCM, most often the buffer tube.

Biggest differences

"Picked" is the share of builds with that part that chose each brand.

Spike'sBCMDifference
Price vs averageAbout average24% pricierSpike's cheaper
Share of builds7%37%BCM 5x
Buffer tubes picked0.7%40%BCM 57x
Handguards picked0.5%13%BCM 25x
BCGs picked4.0%26%BCM 6x
Uppers picked4.5%24%BCM 5x
Parts listed332776BCM 2.3x

Price: Spike's wins

For the same part, Spike's parts run about average and BCM parts run 24% pricier than average.

Builder favorite: BCM wins

Spike's is in 7% of builds and BCM is in 37% of builds.

Receivers: BCM wins

Builders pick BCM upper receivers (5x) more often than Spike's. Lower receivers are about even.

Why BCM: BCM M4 uppers are machined from 7075-T6 forgings with a Type III hard coat anodized finish.

Internals: BCM wins

Builders pick BCM barrels (6x), bolt carrier groups (6x) and buffer tubes (58x) more often than Spike's. Muzzle devices are about even. BCM charging handles, triggers and gas blocks are picked often, Spike's's rarely.

Why BCM: The BCM bolt is Carpenter 158 steel, shot peened, high pressure tested and magnetic particle inspected.

Furniture: BCM wins

Builders pick BCM handguards (26x) more often than Spike's. BCM stocks and pistol grips are picked often, Spike's's rarely.

Shopper clicks: BCM wins

Of recent clicks through to a store for these brands, 76% went to BCM and 24% went to Spike's.

The full record

Everything we track for Spike's vs BCM, from builds, store listings and daily prices.

Spike'sBCM
Share of builds7%37%
Price tierMid pricedPremium
Parts listed332776
Part types2234
Retailers carrying1517
In stock now50%82%
Price change, 90 dayson the most picked partsFlatFlat
On sale nowNoneNone

What builders pair with them

Spike's vs BCM: questions builders ask

Which should you buy, Spike's or BCM?

BCM for upper receivers, bolt carrier groups and buffer tubes. Pick Spike's if you want close to average prices: builders pay about average. Pick BCM if you don't mind paying more: builders pay 24% pricier than average. Builders pick its upper receivers 5x as often and bolt carrier groups 6x as often. Or mix them like builders do: 40% of Spike's builds add BCM, most often the buffer tube.

Is Spike's cheaper than BCM?

Spike's. Spike's about average, BCM 24% pricier than average.

Which do more AR-15 builders use, Spike's or BCM?

BCM. BCM is in 5.2x as many builds.

Spike's or BCM: which receivers do builders pick?

BCM. BCM upper receivers picked 5x as often, close on lower receivers.

Spike's or BCM: which internals do builders pick?

BCM. BCM bolt carrier groups picked 6x as often, buffer tubes picked 58x as often.

Spike's or BCM: which furniture do builders pick?

BCM. BCM handguards picked 26x as often.

Can you mix Spike's and BCM parts?

Yes. 40% of Spike's builds add BCM, most often the buffer tube.

What is Spike's known for?

Spike's Tactical makes AR rifles, uppers, lowers and parts in Florida, with the Spider logo on the lowers. The T3 tungsten buffer is one of their most known parts.

What is BCM known for?

BCM makes mil-spec AR uppers, barrels and bolt carriers, and it test fires every complete upper and bolt carrier group before it ships.