Cryptic Bolt Carrier Group BCG - Complete .308 WIN/7.62x51mm/6.5 Creedmoor Magnese Phosphate
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Cryptic Coatings
Overview
The Cryptic Bolt Carrier Group is designed for .308 Win, featuring a manganese phosphate finish that enhances durability and corrosion resistance. This BCG is integral to the cycling of semi-automatic actions, ensuring reliable operation and consistent performance in various shooting conditions. Builders often incorporate this BCG into precision rifles or tactical builds that require the robustness of the .308 caliber.
Specifications
Cryptic Bolt Carrier Group BCG - Complete .308 WIN/7.62x51mm/6.5 Creedmoor Magnese Phosphate
September 2026 on GunPartPicker
Cryptic Bolt Carrier Group BCG - Complete .308 WIN/7.62x51mm/6.5 Creedmoor Magnese Phosphate ranked #108 of the 217 bolt carrier groups builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #157 of the 446 bolt carrier groups builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today only Optics Planet has it in stock. Prices barely moved in September 2026, holding around $180.99, so there haven't been real sales lately. Buying today, the lowest price is $180.99 at Optics Planet, which matches the best price we saw in September.
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Frequently Built With
The part most often added in each category by the builds that include this one
CMMG MK3 Semi-automatic Stripped Lower Receiver 308 Winchester
TacFire .308 Winchester Built 10 inch Upper Receiver w/ Bolt Carrier Group Black Small
Breek Arms AR 10 Warhammer MOD2 Ambidextrous Black Micro Lever Black Charging Handle
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
Geissele Automatics .154" SSA Trigger
Brownells AR-15 A2 Pistol Grip Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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