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Questions & Answers
Is this made in America? Manufacturer Answer

Yes this is made in the production facility in Watertown WI.

by Griffin Armament, Manufacturer, May 21, 2025
dumb question. but what is mil-spec I have an off brand upper ar15 but no bolt carrier would this work � Manufacturer Answer

AR15 Upper receivers are manufactured to the "Military Standard Specification"(Mil-spec) so most carriers that are Mil-spec should work as long as your upper and the BCG are in spec.

by Griffin Armament, Manufacturer, May 21, 2025
Customer Reviews
Helpful Positive Review
5.56 boat carrier for an AR 15 by Holly, Verified Owner, November 10, 2025
It’s just what I’ve been looking for and I didn’t get a chance to shoot it yet, but I know other friends of mine that bought one of these and that’s why I’m buying this bulk carrier from Griffith
1/3 found this helpful
Helpful Positive Review
More quiet than the stock bolt carrier group by Arty, Verified Owner, January 13, 2026
More quiet than the stock bolt carrier group on my DelTon AR
2/2 found this helpful
Helpful Positive Review
This carrier is built very well. Excellent finish. However the pictures are a bit misleading on the finish. It looks kind of like a black chrome in the pictures, but it is just black. Which is not a huge deal. It’s still pretty slick. Good gas key st...
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Superb BCG by Cheis Clark, Verified Owner, June 9, 2018
I have become a big fan of Griffin gear in the last few years so when I needed a new BCG I decided to give this one a try. This is just a nothing fancy, squared away bolt carrier group. Has the MPI marking and a good looking Griffin winged lion logo....
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Helpful Positive Review
Good enough for government work by Cristian Vazquez, Verified Owner, March 8, 2025
Put this into a mid-tier budget build and can say I'm satisfied with the bcg. About 500 rds in and it runs fine. Slight wear on rails but looks good. Properly staked and a good fitting bolt makes this a good choice. Took one star off because of the f...
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Helpful Positive Review
Great product… but by B dad, Verified Owner, December 20, 2024
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Read All 77 Reviews
Color:
Black
Finish:
Melonite QPQ
Caliber:
.300 AAC Blackout, 5.56x45mm NATO
Gun Make:
AR Platform
Gun Model:
AR-15, M4
Weight:
5 oz
Condition:
New
Included Accessories:
Cam Pin and Extractor, Carpenter 158 Bolt, Carrier, Crane O-Ring, Gas Key

Code: 28N-BCG-GAEMSBCG-GAEBCG

MPN: GAEBCG

UPC: 791154081488

List: $174.95Save $15.00
$159.95

Product Info for Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG)

Why a BCG from Griffin Armament? The simple answer is that these BCG's are the best they've used in their ten years of military service and over a decade of industry involvement. When you look at a top shelf product you can see its quality. These are the best mil spec pattern there are.image

The Griffin BCG combines an 8620 carrier, C-158 (Carpenter) Bolt, 4340 cam pin and extractor. All the proper heat treats, the correct shot peen, and the often neglected post heat treated grind are present. In a market filled with cast component BCG's, all components are billet machined and all surfaces receive a finish pass in machining for improved surface smoothness. There are varying degrees of quality in Melonite QPQ finishes. These BCG's went to 4 finishing houses for selection of the finish provider, cost not being a consideration. The result is a deep black finish with remarkable lubricity. These are assembled to the current military technical data package with permatex'd and properly staked carrier keys. They also feature the current 15,000 round extractor spring design and a Crane O ring for reliable extraction in extreme conditions. At Griffin Armament, they ran these thousands of rounds in multiple manufacturers rifles throughout the T&E phase without a single malfunction. From first sight through months of use to the final product launch they have remained excited to bring this BCG to market. This is the only BCG that has ever excited them and that is why they have chosen to offer it to the people they care about, thier customers.

Specifications for Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG):

Manufacturer: Griffin Armament
Color: Black
Finish: Melonite QPQ
Fabric/Material: 8620 Alloy Steel, 4340 Alloy Steel, 9310 Steel
Carrier Material: 8620 Steel
Bolt Material: 9310 Steel
Caliber: 5.56x45mm NATO, .300 AAC Blackout
Gun Make: AR Platform
Gun Model: AR-15, M4
Weight: 5 oz
Condition: New
Included Accessories: Cam Pin and Extractor, Crane O-Ring, Gas Key, Carpenter 158 Bolt, Carrier

Features of Griffin Armament Enhanced Mil Spec Bolt Carrier Group BCG

  • C-158 Bolt MP inspected, High Pressure Tested
  • Bolt properly heat treated, shot peened, and post heat treat ground with headspace held to half the blueprint specification
  • 4340 Cam Pin and Extractor
  • Finish Pass Machined on all surfaces
  • Full Billet Construction
  • Premium Melonite QPQ Finish
  • Latest 15k round Extractor Spring Design
  • Crane O-ring for increased extraction reliabilty in extreme conditions
  • Billet machined gas key, installed with permatex and staked to current TDP

Package Contents:

  • Griffin Armament Enhanced Mil Spec Bolt Carrier Group BCG

Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) Orderable Models

List of Orderable Models

  • Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG , UPC: 791154081488 , Code: 28N-BCG-GAEMSBCG-GAEBCG

Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-EDEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-EDEMO-IN-B
  • DEMO, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-DEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-DEMO
  • USED, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-EDEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-EDEMO-IN-C
  • DEMO, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-DEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-DEMO-OB-A
  • USED Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG, EDEMO5, Condition Like New, Inspect and Rebox , MPN: GAEBCG-EDEMO5 , Code: 28N-BCG-GAEMSBCG-GAEBCG-EDEMO-RE-A
  • Open Box, Dealer Demo, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-DMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-DMO
  • USED, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-EDEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-EDEMO-US-U
  • USED, Griffin Armament EBCG Enhanced BCG 556 / 300BLK, GAEBCG , MPN: GAEBCG-EDEMO , Code: 28N-BCG-GAEMSBCG-GAEBCG-EDEMO-SC-C
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