Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, with hands-on install experience on AR/AK/Glock platforms.
The Anderson M16 bolt carrier group delivers full-auto-profile geometry for AR-15 and AR-10 pattern rifles chambered in .223 Remington and 5.56 NATO. Anderson Manufacturing machines the carrier body from 8620 steel and the bolt from 9310 steel, both heat-treated to mil-spec hardness ranges. Black nitride finish penetrates the steel surface, reducing friction and increasing surface hardness to RC 70. The M16 profile carrier provides additional mass over semi-auto profiles, smoothing recoil impulse and ensuring reliable cycling with suppressed or short-barreled uppers. Anderson stakes the gas key per TDP and includes a properly heat-treated extractor spring, cam pin, firing pin, and firing pin retainer in the assembly.
Out of the Box
The carrier measures 7.2 inches overall with a full shroud that covers the bolt tail during reciprocation. The 9310 bolt undergoes magnetic particle inspection (MPI) to detect sub-surface cracks before nitride treatment. Anderson cuts eight locking lugs to USGI specifications and dimensions the extractor claw to maintain tension on rimmed .223 and 5.56 cases. The gas key is secured with Grade 8 screws torqued to 35-40 inch-pounds and staked at two points per screw. Black nitride treatment converts the outer 0.001-inch layer of steel into iron nitride, producing a matte black finish that resists corrosion in salt, moisture, and carbon fouling environments. You receive the BCG ready to install—no additional break-in or surface prep required.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | .223 Remington / 5.56 NATO (.300 BLK compatible) |
| Profile | M16 full-auto (full shroud) |
| Carrier material | 8620 steel |
| Bolt material | 9310 steel, MPI tested |
| Finish | Black nitride |
| Gas key | Properly staked, Grade 8 screws |
| Included | Cam pin, firing pin, firing pin retainer |
| Manufacturer | Anderson Manufacturing |
Anderson builds this BCG to USGI technical data package dimensions. The M16 profile adds 1.5 ounces over semi-auto carriers, increasing reciprocating mass to reduce felt recoil and improve extraction timing under adverse conditions. You can swap this BCG into any mil-spec AR-15 upper receiver without additional fitting. Explore the full bolt carrier group selection for alternative finishes and carrier profiles.
Who It’s For
Builders assembling budget-conscious AR-15 rifles benefit from Anderson’s combination of mil-spec materials and black nitride corrosion resistance at under $80. Shooters running suppressed uppers gain the reliability advantage of M16 carrier mass without the cost of specialty coatings. The .300 Blackout compatibility expands utility for hunters and recreational shooters who swap uppers between calibers on the same lower receiver. If you require a phosphate finish for contract compliance or prefer DLC coatings for ultra-low friction, compare alternative BCG offerings in higher price tiers.
Safe Handling & Compliance
Installation of bolt carrier groups requires disassembly of the upper receiver and manipulation of the charging handle and buffer assembly. Always verify the chamber is empty and the magazine is removed before beginning installation. Incorrect headspace or improper bolt lockup can cause catastrophic failures—confirm proper function with snap caps and visual inspection before live-fire testing.
- Follow the four universal rules: treat every firearm as loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until sights are on target and you have made the decision to shoot, be certain of your target and what lies beyond it.
- Verify local and state laws regarding AR-15 component purchases and modifications—some jurisdictions restrict full-auto-profile carriers or impose additional registration requirements.
- Inspect the bolt for cracks, extractor tension, and gas ring seal after every 500 rounds; replace worn components immediately to prevent short-stroking or failures to extract.
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