MODERN WEAPON SYSTEMS - MWS BCG NICKEL BORON AR-15 556 BOLT CARRIER
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If you want the best bolt carrier on the market, you just found it. We custom machine our bolt carrier groups with a focus on tolerance and a unique, aggressive look that also reduces weight. We then coat the entire carrier with nickel boron. This coating gives the carrier extreme lubricity, stops the finish from wearing away with use, and makes cleaning the carrier as simple as wiping it with a dry rag. Simply put, this is the last bolt carrier you will ever need to buy for your rifle.
Specs for all MWS Bolt Carrier Groups.
Total weight - 11oz
Carrier is 8620 carpenter steel
Bolt is 9310 carpenter steel
MPI tested, and shot-peened
Grade A fasteners
Properly staked carrier key
McFarland style low friction one piece gas ring
Nickel Boron coated: adds lubricity, durability, makes it easy to clean, sexy
*One piece gas ring is intended to reduce friction - unlock carrier like butter during cycling to make sure your followup shots are quick and dead on. (*Note one piece gas ring system may require additional gas to operate vs standard rings which also may be used)