function once installed is correct but the install was fiddly because the roll pin holes were a touch undersized on mine. had to chase them lightly with a pin punch to seat the pin. once in, no movement



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B5 Systems
Overview
The B5 Systems Trigger Guard ATG-001-01 is a robust aluminum trigger guard designed to enhance the functionality of your AR-15 build. Finished with hardcoat anodizing, this black trigger guard offers both durability and a sleek appearance, ensuring it can withstand the rigors of use while maintaining a professional look. This trigger guard is often found in mid-length gas system builds chambered in 5.56 NATO, providing a reliable component for builders looking to create a solid platform.
Based on build data

CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B

Strike Industries Extended Bolt Catch

Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension

Timber Creek Outdoors Ambidextrous Safety Selector - Black

Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger

Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 334 | |
| Strike Industries Extended Bolt Catch | 223 | |
| Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension | 213 | |
| Timber Creek Outdoors Ambidextrous Safety Selector - Black | 170 | |
| Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger | 159 | |
| Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C | 147 |
| Platform | Percentage |
|---|---|
| AR-15 | 71.6% |
| AR-10 | 23.9% |
| AR-9 | 4.5% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 75% |
| .223 Wylde | 12.5% |
| 300 Blackout | 5.4% |
| .450 Bushmaster | 1.8% |
| .308 Win | 1.8% |
| 6.5 Creedmoor | 1.8% |
| 9mm | 1.8% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 40.9% |
| Carbine | 25% |
| Rifle | 20.5% |
| Pistol | 11.4% |
| Intermediate | 2.3% |
Builds in the community that include the B5 Systems Trigger Guard ATG-001-01
| Build | Parts | Total |
|---|---|---|
![]() | 23 | $2453.92 |
![]() | 24 | $1522.90 |
![]() | 28 | $3878.37 |
![]() | 31 | $2760.50 |
![]() | 18 | $1319.58 |
![]() | 14 | $2277.48 |
![]() | 13 | $1066.98 |
![]() | 30 | $4565.04 |
![]() | 27 | $4153.91 |
![]() | 28 | $2481.37 |
![]() | 22 | $1594.89 |
![]() | 24 | $3792.70 |
4 global ratings
function once installed is correct but the install was fiddly because the roll pin holes were a touch undersized on mine. had to chase them lightly with a pin punch to seat the pin. once in, no movement
B5 polymer guard, locked to the lower with a roll pin. integrated lower contour gives a flush look. lighter than aluminum which is the appeal for a polymer build
B5 Systems trigger guard is well machined but the install was a bit fiddly because the roll pin required a specific punch size to avoid marring the polymer body. Once installed it sits flush. Larger interior than mil-spec for gloves.
B5 Systems trigger guard is well machined but expensive for what it is - basically a milspec replacement with their logo. Polymer is dense. Roll pin install was standard. Functions fine, the price is the issue.