All BCM4 Lower Receiver Groups feature:

• Machined from Aluminum Forgings 7075-T6
• Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
• BCM Milspec 7075-T6 Receiver Extention
• Staked M4 Lock Nut
• USGI H Buffer (1 USGI Tungsten, 2 Steel)
• BCM Trigger Guard
• BCM PNT Trigger
• BCM Gunfighter's Grip, Mod 3
• Low Shelf for RDIAS installation
• Low Shelf for Accuwedge use
• Fire Controls marked SAFE and SEMI

Buffer Kit:

• Lessens felt recoil, without compromising reliability
• Provides a more consistent carrier velocity, which can aid in accuracy, reliability over conventional carbine buffer system
• Increased internal counterweight travel reduces bolt bounce
• Internal spring to reduce noise of counter weight shifting and ensure more consistent weight placement
• Mil-Spec M16A4 rifle spring with more spring coils than M4 carbine, increases consistency and widens operating envelope
• Buffer made of 7075T6 aluminum, hard coat anodized for lasting endurance. Comprised of Mil-Spec components
• BCM US Patent #10415907
• Weight = approximately 3.8oz

BCMGUNFIGHTER™ StockAssembly - Mod 1 - SOPMOD (Widebody) Compartment

Strong and Lightweight for your mil-spec receiver extension.

• More pronounced cheekweld (SOPMOD type)
• Snag free Design. No sharp edges prevent tangling of the rifle with the shooter's sling, molle gear, or other kit.
• Modular VBOST (Vehicle Borne Operations Sling Tab) This tab interfaces with the shooter's riggers' band or bungee to secure the shooter's sling against the stock when the carbine is not in use. Increasingly, this is the most common application when operating inside a vehicle.
• 2 different types of ambidextrous sling mounting options, including QD swivel sockets.
• Longer overall length to fit longer "MilSpec" diameter AR10/A5/Intermediate receiver extensions.
• Storage compartment located in the toe of the stock, accessible through butt pad.
• Two different ambidextrous sling mounting options.
• Built in rubber butt pad for secure shoulder placement.

Please NOTE:  Because of the MK2’s longer length some Mil-Spec stocks may not completely collapse closed all the way up to the M4 Lock nut.