What is the difference between NP3 and chrome finishes?

NP3 is a self-lubricating, highly wear-resistant finish, while chrome is extremely durable, corrosion resistant, and easy to clean.

KAK BCG | AR15 Bolt Carrier Groups – Chrome, Phosphate, NP3 & AR9

Q: What rifles are KAK BCGs compatible with?

KAK manufactures BCGs for AR-15 rifles chambered in 5.56 NATO, 300 Blackout, 7.62x39, and AR9 9mm platforms.

Q: Are KAK AR15 BCGs full auto rated?

Yes. All KAK AR15 bolt carrier groups are machined to the M16 full auto profile for added strength and long-term reliability.

Q: What finishes are available on KAK BCGs?

KAK offers chrome, chrome-lined phosphate, nitride, and NP3 finishes to provide different balances of toughness, smoothness, and corrosion resistance.

Q: Do KAK BCGs work well in suppressed rifles?

Yes. KAK's K-SPEC enhanced BCGs include side vent and down vent gas systems that reduce blowback and improve performance when suppressed.

Q: Does KAK offer spare parts kits for BCGs?

Yes. KAK sells completion kits with firing pins, retaining pins, and cam pins in both phosphate and chrome finishes.

KAK BCG | AR15 Bolt Carrier Groups – Chrome, Phosphate, NP3 & AR9

**KAK 9mm Enhanced Bolt Carrier Group – AR15 / AR9 Compatible** $153.00

**KAK AR15 BCG – 5.56, C158 Bolt, Chrome Lined Phosphate** $126.65

**KAK K-SPEC Enhanced AR15 BCG – 5.56 / 300 Blackout, C158 Bolt, Chrome Lined Phosphate** $188.95

**Kak Ar15 BCG M16 5.56 K-spec Np3 De** $247.49

**KAK AR15 BCG – .224 Valkyrie / 6.8 SPC, Chrome Lined Phosphate** $125.99

**KAK K-SPEC Enhanced AR15 BCG – 5.56 / 300 Blackout, Chrome Lined Phosphate** $181.15

**KAK AR15 BCG – 5.56 / 300 Blackout, Chrome Lined Phosphate OEM** $116.99

**KAK K-SPEC Enhanced 7.62x39 BCG – Dual Ejector, NP3, Chrome Lined** $251.99

**KAK K-SPEC AR15 BCG – 5.56 / 300 Blackout, Dual Ejector, NP3** $242.99

**KAK K-SPEC Enhanced AR15 BCG – 5.56 / 300 Blackout, Dual Ejector, FDE PVD** $215.99

**KAK AR15 BCG – 5.56 / 300 Blackout, NP3** $218.23

**KAK K-SPEC Enhanced AR-15 BCG – Dual Ejector, Side Vent, Full Chrome, 5.56 / 300 Blackout** $219.99

**KAK AR15 BCG – Full Chrome Bolt Carrier Group for 5.56 / 300 Blackout** $116.99

**KAK AR15 BCG Completion Kit – Firing Pin, Retaining Pin & Phosphate Cam Pin** $19.73

**KAK K-SPEC Enhanced AR15 BCG – Dual Ejector, Full Chrome, 5.56 / 300 Blackout** $219.99

**KAK K-SPEC AR-15 BCG – Enhanced Carrier, Down Vent, Sand Cuts, Chrome Lined Phosphate** $103.49

**KAK AR15 BCG Completion Kit – Firing Pin, Retaining Pin & Full Chrome Cam Pin** $22.36

When it comes to building or upgrading your AR-15, the bolt carrier group (BCG) is one of the most important components you’ll choose. At Mounts Plus, we carry the full line of KAK BCGs, trusted for their Mil-Spec reliability, durable finishes, and precision machining. Whether you’re running 5.56 NATO, 300 Blackout, 7.62x39, or AR9 9mm, KAK Industry has a BCG to match your rifle’s needs.

From full chrome carriers that resist fouling to chrome-lined phosphate finishes for Mil-Spec toughness, and advanced NP3 coated models for smooth cycling, each KAK BCG is built for shooters who demand consistent performance in any condition.

Why Choose a KAK Bolt Carrier Group?

Mil-Spec Reliability – Designed to meet or exceed military standards
Caliber Options – Available for AR-15, AR9, 7.62x39, 5.56, and 300 BLK builds
Finish Variety – Chrome, chrome-lined phosphate, nitride, and NP3 coatings
Full Auto Profile – All AR15 carriers machined to M16 spec for added strength
Suppressed Shooting Options – K-SPEC enhanced BCGs with side vent or down vent ports reduce blowback
Spare Parts Kits – Firing pin, retaining pin, and cam pin kits available in chrome and phosphate

Popular KAK BCG Models

KAK AR15 BCG – Chrome: Smooth cycling, easy to clean, and corrosion resistant
KAK AR15 BCG – Chrome-Lined Phosphate: Traditional Mil-Spec phosphate exterior with a slick chrome interior
KAK K-SPEC Enhanced BCG: Dual ejectors, vented carriers, and sand cuts for suppressed or high-volume shooting
KAK NP3 BCG: Self-lubricating finish with superior wear resistance
KAK AR9 BCG – 9mm: Reliable function for pistol-caliber carbines
KAK BCG Completion Kits: Essential spare parts to keep your rifle running

FAQ – KAK Bolt Carrier Groups

Q: What rifles are KAK BCGs compatible with?
A: KAK manufactures BCGs for AR-15 rifles in 5.56 NATO, 300 Blackout, 7.62x39, and AR9 9mm platforms.

Q: Are KAK AR15 BCGs full auto rated?
A: Yes. All KAK AR15 bolt carrier groups are machined to the M16 full auto profile for extra durability and reliability.

Q: What finishes are available on KAK BCGs?
A: KAK offers chrome, chrome-lined phosphate, nitride, and NP3 finishes to balance toughness, smoothness, and corrosion resistance.

Q: Do KAK BCGs work well in suppressed rifles?
A: Yes. KAK’s K-SPEC enhanced carriers feature side vent or down vent gas ports designed to reduce blowback when suppressed.

Q: Does KAK offer spare parts kits for BCGs?
A: Absolutely. KAK provides completion kits with firing pins, retaining pins, and cam pins in both phosphate and chrome finishes.

Q: What makes NP3 and chrome finishes different?
A: NP3 is self-lubricating and extremely wear-resistant, while chrome is durable, corrosion resistant, and very easy to clean.

Final Thoughts

The KAK BCG lineup delivers proven performance for AR-15 owners who want Mil-Spec strength and finish options to match their builds. Whether you’re upgrading to a chrome AR15 bolt carrier group, testing out an NP3 BCG, or building a suppressed setup with a K-SPEC vented carrier, Mounts Plus has the KAK solution to keep your rifle running flawlessly.

👉 Browse our full selection of KAK AR15 BCGs today and find the carrier group that matches your build’s performance needs.