Nice Apollo XBA21 Arm Cap Kit for M3BAR M5BAR M7BAR L9BAR
The Nice Apollo XBA21 kit is used to replace or install the finished end caps on compatible XBA-style barrier arms. These caps do a simple but important job: they close off the arm profile, help keep the arm looking finished, and reduce exposure at the open aluminum ends. In parking and access-control sites, arm caps are often lost or damaged after arm strikes, accessory installation, arm shortening, or general wear. XBA21 is commonly associated with M3BAR, M5BAR, M7BAR, and L9BAR barrier arm setups and includes both flush and raised end styles, which helps cover different arm-end finishing needs. The cap style must match the actual barrier arm profile; it should not be selected based only on the operator cabinet model.
Compatible With
- Nice Apollo M3BAR barrier arm applications
- Nice Apollo M5BAR barrier arm applications
- Nice Apollo M7BAR barrier arm applications
- Nice Apollo L9BAR barrier arm applications
- Compatible XBA series barrier arms using the flush/raised cap styles supplied in the XBA21 kit
- Verify arm profile before ordering; not intended for unrelated round, rectangular, or older non-XBA arms
Features & Specifications
| Manufacturer | Nice Apollo |
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| Product Type | Barrier arm cap kit |
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| Part Number | XBA21 |
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| Application | Replacement finished ends for compatible barrier arms |
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| Compatible Operator Type | M3BAR, M5BAR, M7BAR, and L9BAR arm systems when the arm profile matches |
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| Included Components | Two flush finished ends and two raised finished ends |
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| Notes | Match cap style to the installed arm profile |
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Also Known As / Related Part Numbers
- XBA21
- XBA-21
- NICE-XBA21
- Nice Apollo XBA21
- Arm cap kit
- Arm cap with 2 flush and 2 raised finished ends
- M3/M5/M7/L9BAR arm cap kit
Technician Note
This XBA21 item should be matched to the installed Nice Apollo barrier operator and parts diagram. For M-Bar and L-Bar equipment, confirm the arm length, control board, cabinet style, and accessory requirements before replacing parts by appearance alone.
Before Ordering
- Confirm the full barrier operator model and arm family.
- Match the visible part number or parts diagram reference to the item being ordered.
- Check for related required parts such as XBA13 rubber strips, compatible control board, lid, arm section, or mounting hardware.
- Do not assume similar XBA part numbers are interchangeable.
- For electrical accessories or control board replacement, use a qualified gate technician if the system has unsafe wiring, missing safety devices, or high-voltage concerns.
Professional Advisory
Barrier arm systems are exposed to vehicle impact, weather, vibration, and frequent cycling. After replacing any arm, light, control, mounting, or traffic accessory, the installer should check arm balance, movement, clearances, safety devices, warning devices, and final operation before returning the lane to service.
Product Questions & Answers
What does the XBA21 kit include?
XBA21 is commonly listed as an arm cap kit with two flush finished ends and two raised finished ends.
Which barrier arms commonly use XBA21?
It is commonly listed for M3BAR, M5BAR, M7BAR, and L9BAR arm applications.
Is XBA21 a replacement arm?
No. It is an arm cap kit only. The aluminum arm section, hub, spring, and operator parts are separate.
Can I use this on a damaged arm?
Only if the arm profile is still serviceable and the cap mounting area is not bent or broken. A badly damaged arm section may need replacement.
What should be checked before ordering?
Check the barrier arm family, arm profile shape, cap style, and whether the missing cap is flush or raised.
