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Questions & Answers
Which one would I run for a 300 Blk Expert Answer

Item IC-S1EV-556 is the model for .300 AAC Blackout.

by Ethan C., Gear Expert, November 27, 2019
how much does it weigh? Expert Answer

Iron City Rifleworks does not specify a specific weight for these, however they do state that these are standard weight BCG's.

by Jonathan D., Gear Expert, October 14, 2019
Customer Reviews
Most Recent Reviews
Performs flawlessly by Nick, Verified Owner, December 9, 2019
I have only ran about 20 rounds through my 224 Valkyrie but this bolt is working perfectly as it should. The finish looks amazing and really adds to the looks of the rifle. More on the expensive side but I would say it was well worth it.
Read 1 Review
Color:
Nickel Boron
Caliber:
.458 SOCOM
Gun Make:
AR Platform
Condition:
New

Code: 39K-BCG-ICRW7-IC-S1EV-458

MPN: IC-S1EV-458

UPC: 680226115117

Product No Longer Available

Product Info for Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group (BCG)

EVO S1 Drop-in (BCG)image

Advanced NiB Technology

DROP IN READY.

Standard Weight BCG.

556/223/300BlkOut/224Vakyrie/6.5Grendel/6.8SPC.

The S1 BCG was created for use in real world applications without all the disadvantages of MILSPEC coatings. The EVO coating is the same gen 2 NiB coating used on our Competition Series BCG.

The NiB coating is twice as durable as traditional NiB and has a coefficient of friction of 0.08. Unlike traditional NiB the EVO has the appearance of chrome and is even easier to clean.

Package Contents:

  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group

Ammunition

160 / 60
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Related Products to Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group (BCG)

Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group (BCG) Unavailable & Discontinued Models

List of Unorderable Models

  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group BCG, .458 Socom, Nickel Boron, IC-S1EV-458 , MPN: IC-S1EV-458 , UPC: 680226115117 , Code: 39K-BCG-ICRW7-IC-S1EV-458
  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group BCG, 5.56/.223/300 BLK, Nickel Boron, IC-S1EV-556 , MPN: IC-S1EV-556 , UPC: 680226115070 , Code: 39K-BCG-ICRW7-IC-S1EV-556
  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group BCG, 224 Valkyrie, Nickel Boron, IC-S1EV-224 , MPN: IC-S1EV-224 , UPC: 680226115087 , Code: 39K-BCG-ICRW7-IC-S1EV-224
  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group BCG, 7.62x39, Nickel Boron, IC-S1EV-762 , MPN: IC-S1EV-762 , UPC: 680226115100 , Code: 39K-BCG-ICRW7-IC-S1EV-762
  • Iron City Rifle Works EVO S1 Drop-in Bolt Carrier Group BCG, 6.5 Grendel, Nickel Boron, IC-S1EV-65G , MPN: IC-S1EV-65G , UPC: 680226115094 , Code: 39K-BCG-ICRW7-IC-S1EV-65G
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Last updated 2026-08-03 UTC.