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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG) Up to 23% Off — Free 2 Day Shipping w/ code 2DAYAIR — 5 models

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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Complete Bolt Carrier Groups
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
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TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM
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TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group, Black Nitride, BCG556-LM

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Questions & Answers
full auto???? Expert Answer

Please email us at techsales@opticsplanet.com regarding your question.

by Hunter, Gear Expert, October 7, 2022
See 1 More Answer
I have a AR-15 223. Can I use 5.56. And, what is a Bolt Carrier Group? Expert Answer

The TRYBE Defense AR-15 5.56 Complete Bolt Carrier Group will work in an AR15 chambered in .223. If your AR is chambered in .223 you cannot shoot 5.56 but if your AR is chambered in 5.56 you can shoot .223. The guide below will explain in more detail. The Bolt Carrier Group is the housing (Carrier) that holds the bolt and other components.
https://www.opticsplanet.com/howto/223-remington-vs-5-56mm-nato-ammo.html

by Hunter, Gear Expert, October 7, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Great Lightweight BCG by Alex, February 8, 2023
I am very happy with this BCG. So light and a really unique design. I put 500 rounds through it last weekend and it performed without any issues. Easy install. Well built and bolts properly staked. Really just a great lightweight BCG if you want to s...
Read More...
8/8 found this helpful
Helpful Positive Review Great for my dissipator by Sean, Verified Owner, April 17, 2023
I got a delton dissipator and those builds are notorious for weaker gas, but very pleasant recoil. I got this BCG as it is about 30% less weight than a regular milspec bcg. It solved any short stroking issues I had and my dissipator cycles reliably e...
Read More...
5/5 found this helpful
Helpful Positive Review Great bolt carrier by Bryan Savage, Verified Owner, March 17, 2023
Used it in a "lightweight" build and man it works. Barrel and bolt are the heart of any rifle. With this BCG you can know the bolt part is good. 1500 rounds on it so far. Cleaning ever 500 or so and no malfunctions. Finish still looks new
5/5 found this helpful
Helpful Negative Review Recommended w/ Caveats by ReviewThePew, Verified Owner, September 6, 2024
Good value lightweight bolt. Used in a 300blk build with good success even with dirty subs and heavy lube. Sand cuts seem to be solid. Need more rounds to test durability. Part of cam pin channel was chipped but did not affect reliability so far... N...
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4/4 found this helpful
Most Recent Reviews This BCG is trash by Valentino M.F. Castro, Verified Owner, March 28, 2025
Even for the price this BCG is trash. Arrived partially disassembled and the parts don't fit together.
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Most Recent Reviews The one I received was defective by JoshH, Verified Owner, July 5, 2023
The BCG I received would bind badly in all 3 different uppers I tried it in. With a lot of force I could get it to go all the way in, but then it was nearly impossible to get it. I never tried to fire it and returned it. I couldn't see any clear defe...
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7/7 found this helpful
Read All 9 Reviews
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Product Info for TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG)

Low-Mass. High-Precision. Tuned for Gas Optimization.image

Drop ounces, not performance. The TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group is a precision-engineered BCG optimized for reduced reciprocating mass, faster cyclic rates, and improved recoil management in tuned AR-15 platforms. Built for shooters who demand faster cycling, reduced recoil impulse, and uncompromising durability under high round counts and harsh conditions.

The bolt carrier is CNC-machined from AISI 8620 steel, selected for its core hardness, tensile strength, and fatigue resistance. The reduced-mass geometry includes lightening cuts and skeletonization to bring the carrier weight to approximately 8.8 ounces — a 25–30% weight reduction from standard M16-profile carriers.

The bolt is constructed from AISI 9310 steel, offering enhanced toughness and superior fatigue resistance compared to traditional Carpenter 158. Each bolt undergoes shot peening, magnetic particle inspection (MPI), and high-pressure testing (HPT) to ensure structural integrity under high round counts and adverse firing conditions.

Each unit is QPQ nitride treated for extreme surface hardness, corrosion resistance, and smooth, low-friction operation — even in suppressed setups. Available in your choice of high-performance finishes — including Black Nitride, Nickel Boron, Gold Titanium Nitride, and PVD — each variant offers a distinct balance of lubricity, corrosion resistance, and eye-catching appeal.

This lightweight BCG is optimized for use with adjustable gas blocks, tuned buffer weights, and reduced-power recoil springs, enabling shooters to fine-tune cyclic energy and bolt velocity. Ideal for flat-shooting competition rifles, suppressed builds, or any system requiring precise control over gas and inertia forces. Whether you're dialing in a race gun or fine-tuning a lightweight duty rifle, the TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group is engineered for anyone demanding faster cycling and less recoil impulse.

 

If you like what you see, click on the links below to view a wide variety of our best-in-class offerings from TRYBE Defense, TRYBE Optics, and TRYBE Tactical. TRYBE has hard-core offerings ready to augment your favorite firearm or next custom build that offer superb performance, keeping in mind your hard-earned dollar.

TRYBE Defense Gun Parts and Accessories, Gunsmithing Equipment, Personal Protective Equipment, Pistol Parts, Rifle Parts, and Triggers

TRYBE Optics Binoculars, Night Vision, Rangefinders, Red Dot Sights, Riflescopes, and Weapon-Mounted Accessories

TRYBE Tactical Apparel, Eyewear, Gun Cases, Hearing Protection, Holsters, Magazine Pouches, Plate Carriers, and Range Bags

Specifications for TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG):

Manufacturer: TRYBE Defense
Fabric/Material: AISI 8620 Steel
Caliber: 5.56x45mm NATO, .300 AAC Blackout, .223 Remington
Gun Make: AR Platform
Gun Model: M16, M4, AR-15

Features of TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG):

  • Carrier: AISI 8620 Steel, Low-Mass Profile, Skeletonized Cuts, Forward Assist Compatible
  • Bolt: AISI 9310 Steel, Shot-Peened, MPI & HPT Certified
  • Gas Key: Chrome-Lined, Properly Staked per MIL-SPEC Requirements, Hardened Steel
  • Firing Pin: Standard Profile, Enhanced Surface Treatment
  • Made in the USA
  • Finish Options
    • Black Nitride (QPQ) – Corrosion-Resistant, Surface-Hardened, Matte Black
    • Nickel Boron (NiB) – Electroless-Coated, Self-Lubricating, Low-Friction, Matte Silver Appearance
    • High-Polished Nickel Boron (NiB) – Electroless-Coated, Self-Lubricating, Low-Friction, High Polished Silver Appearance
    • Gold Titanium Nitride (TiN) – Ultra-Hard, Optimized for Wear Surfaces, Matte Gold Appearance
    • Rainbow PVD (Physical Vapor Deposition) – Advanced Vapor-Phase Coating for Superior Wear & Heat Resistance

Package Contents:

  • TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG)

TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG) Orderable Models

List of Orderable Models

TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM , MPN: BCG556-LM , UPC: 810089411938 , Code: TRB-ABA-AC1-BCG556-LM
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, High-Polished Nickel Boron, BCG556-LMHPNB , MPN: BCG556-LMHPNB , UPC: 810089415189 , Code: TRB-ABA-AC1-BCG556-LMHPNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Nickel Boron, BCG556-LMNB , MPN: BCG556-LMNB , UPC: 810089415172 , Code: TRB-ABA-AC1-BCG556-LMNB
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Matte Gold Chrome, BCG556-LMGLD , MPN: BCG556-LMGLD , UPC: 810089415134 , Code: TRB-ABA-AC1-BCG556-LMGLD
TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group, Rainbow PVD, BCG556-LMPVD , MPN: BCG556-LMPVD , UPC: 810089415165 , Code: TRB-ABA-AC1-BCG556-LMPVD

TRYBE Defense Low-Mass AR-15 Complete Bolt Carrier Group (BCG) Unavailable & Discontinued Models

List of Unorderable Models

USED TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM, EDEMO3, Condition Fair, Other , MPN: BCG556-LM-EDEMO3 , Code: TRB-ABA-AC1-BCG556-LM-EDEMO-OT-D
USED, TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM , MPN: BCG556-LM-EDEMO , Code: TRB-ABA-AC1-BCG556-LM-EDEMO-IN-C
USED TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM, EDEMO4, Used, Condition Fair , MPN: BCG556-LM-EDEMO4 , Code: TRB-ABA-AC1-BCG556-LM-EDEMO4
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