+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

New! San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group STT-BCG-556-P Color: Black, Finish: Heavy Manganese Phosphate, $10.00 Off w/ Free S&H

Photo Coming Soon!
You May Also Like
Best Rated Magpul Industries PMAG GEN M3 AR-15 Rifle Magazine, .300 Blackout, 30 Round, Black, 1 Pack, Polymer, MAG800-BLK-30RD
Magpul Industries PMAG GEN M3 AR-15 Rifle Magazine, .300 Blackout, 30 Round, Black, 1 Pack, Polymer, MAG800-BLK-30RD
(42)
List: $16.95 $15.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(63)
List: $13.95 $12.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(61)
List: $18.95 $17.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI557BLK-30RD
(44)
List: $15.95 $14.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M3 AR-15 Rifle Magazine, .300 Blackout, 20 Round, Black, 1 Pack, Polymer, MAG1182-BLK-20RD
Magpul Industries PMAG GEN M3 AR-15 Rifle Magazine, .300 Blackout, 20 Round, Black, 1 Pack, Polymer, MAG1182-BLK-20RD
(17)
List: $16.95 $15.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(61)
List: $18.95 $17.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 20 Round, Black, 1 Pack, Polymer, MAG560BLK-20RD
(27)
List: $15.95 $14.95 Save Up to $1.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Medium Coyote Tan, 1 Pack, Polymer, MAG557-MCT-30RD
(44)
List: $15.95 $14.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(15)
List: $16.95 $15.75 Save Up to $1.20
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(14)
List: $23.95 $22.45 Save Up to $1.50
Questions & Answers

New Product

See more new San Tan Tactical Gun Parts items
We’ve just added this new product to OpticsPlanet. Be the first to get it!
Color:
Black
Finish:
Heavy Manganese Phosphate
Caliber:
.223 Remington, .300 AAC Blackout, 5.56x45mm NATO
Gun Make:
AR Platform
Gun Model:
AR-15
Gun Frame Size:
Small
Weight:
10.72 oz

Code: 3R1-BCG-WOQKD9QW-STT-BCG-556-P

MPN: STT-BCG-556-P

UPC: 810208845132

List: $199.00Save $10.00
$189.00

  • San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group, Phosphate Finish, Black, Small, STT-BCG-556-P
  • Walker Defense Research Research Steel Bolt Carrier Group BCG, 5.56mm / .300 BLK, DLC, Flat Dark Earth, FDE-DLC-BCG-556
As low as $398.99
You Save Up to $20.00
OP Bucks$7.98
Expert AdviceRequest for QuotePrice Match

Product Info for San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group

Built for classic military-grade durability, the San Tan Tactical Phosphate 5.56/.223 Bolt Carrier Group delivers proven, battle-tested reliability. Featuring a heavy manganese phosphate outer finish, this BCG holds wet lubrication exceptionally well for consistent cycling under hard use. The carrier bore and key are chrome-lined to resist gas erosion and heat fatigue, making it the ideal choice for shooters who want a rugged, no-nonsense mil-spec assembly built for demanding conditions.image

Specifications for San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group:

Manufacturer: San Tan Tactical
Color: Black
Finish: Heavy Manganese Phosphate
Carrier Material: Case Hardened 8620 steel
Bolt Material: 9310 Case Hardened Steel
Caliber: 5.56x45mm NATO, .300 AAC Blackout, .223 Remington
Gun Make: AR Platform
Gun Model: AR-15
Gun Frame Size: Small
Length: 10.5 in
Weight: 10.72 oz

Features of San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group

  • Traditional manganese phosphate finish for maximum oil retention
  • Chrome-lined interior carrier bore and gas key
  • Precision-machined to exact mil-spec dimensions
  • High corrosion resistance; shot-peened and magnetic particle inspected (MPI) bolt
  • Reliable drop-in performance for standard 5.56/.223 uppers

Package Contents:

  • San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group

What firearm models does the manufacturer say San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group is compatible with?

The manufacturer says that San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group is compatible with AR-15

San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group Orderable Models

List of Orderable Models

  • San Tan Tactical 5.56/.223 Mil Spec Bolt Carrier Group, Phosphate Finish, Black, Small, STT-BCG-556-P , MPN: STT-BCG-556-P , UPC: 810208845132 , Code: 3R1-BCG-WOQKD9QW-STT-BCG-556-P
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-10-18 UTC.