Microbest BCG 556 Chrome C158 LUXE Cr Ext

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Features:
- All-Chrome carrier, extractor.  OCKS are phosphated
LUXE UPGRADES (listed in blue italics for your viewing pleasure)
- Sprinco 27001 Extractor Spring, 5-coil 
- Sprinco 27001 Ejector Spring, Enhanced Chrome Silicon Moly Plated Cryogenic Processed
- OCKS Gas Key Fasteners, phosphate finish

Bolt Carrier:
Heavy Duty M16 design
8620 steel heat treated
Gas Key Material - 4140 heat treated
OCKS Gas Key Fasteners, phosphate finish
Chrome plated gas key and carrier interior
Hard chrome finish

Bolt Subassembly:
Bolt: 158 Carpenter Steel, shot peened per mil spec
MPI tested
Extractor: 4340 mil spec, hard chrome finish
Extractor Pin: S7 mil spec
Extractor Spring: Sprinco 27001 5-coil Extractor Spring
Extractor Insert: Mil-Spec Black Extractor Insert
Extractor O-Ring: NO - This version uses the extractor insert instead
Ejector Pin: S7 mil spec
Ejector Spring: Sprinco 27001 Enhanced Chrome Silicon Moly Plated Cryogenic Processed
Gas rings: Three (3), Mil spec
Chrome plated

Cam Pin:
4340 mil spec
Hard chrome finish

Firing Pin:
Mil spec firing pin made from centerless ground 8740 steel, hard chrome plated

Microbest Notes:
1. All BCG's are assembled by Microbest.
2. The OCKS screws are torqued and gas keys are staked by Microbest in a mass production facility with proper quality controls.  The OCKS screws are not 'clocked' (clocked defined here as the staking indent is in sync by the valley created by the OCKS indents which is done sloly by hand under a magnifying glass).  If you are looking for a clocked staking, please consider a hand assembled BCG for double this price.

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