Brn-4/Hk416 Bolt Assembly

Name: Brn-4/Hk416 Bolt Assembly
Brand: Brownells
Availability: InStock

Brownells · Bolt Carrier Group

No ratings yet

Best price

$79.99at Brownells

In stock Sale checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$79.99Salechecked Oct 1, 2026	In stock	Buy at Brownells

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Show

Lowest in-stock price in the last 30 days: $79.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$79.99	$79.99	$79.99

Since Sep 27, 2026.

About this part

The Brn-4/Hk416 Bolt Assembly is a 5.56 / .223 bolt carrier group from Brownells. One store lists it, Brownells at $79.99. The lowest in-stock price in the last 30 days was $79.99 at Brownells.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer: Brownells
Platform: AR-15
Caliber: 5.56 mm NATO
Material: Steel

From the manufacturer

Replacement or spare Bolt Assembly for the Brownells BRN-4A(R). Completely assembled with ejector and extractor. Black nitride finished exterior makes for an extremely hard and durable part. Compatible with HK416 and MR556 rifles. Nitride finish Complete assembly includes extractor and ejector Extractor features black insert with o-ring for positive extraction 5.56x45mm NATO / 223 Remington bolt face Magnetic particle inspected 9310 tool steel Mfg: Brownells