Quick Summary
The 5KU B-31C Classic Upper Handguard Rail System is an upper handguard rail system for AK series airsoft rifles. It is stated as a black part with a 196 mm full length and a 20 mm top rail, and it is described as suitable for LCT, GHK, CYMA, D-Boys and Tokyo Marui AK series AEG and GBB rifles.
For buyers choosing this type of spare part, the main checks are exact model fit, the rifle type, and whether the rail length and configuration match the build you have in mind.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand / model | 5KU B-31C. Useful for matching the exact part variant. |
| Product type | Classic upper handguard rail system for AK series airsoft rifles. |
| Colour | Black. |
| Length | 196 mm full length. Important for checking fit and overall rifle configuration. |
| Top rail | 20 mm top rail. Relevant if you need a standard rail interface. |
| Material | Aluminum. A key detail for identifying the part construction. |
| Compatibility | LCT, GHK, CYMA, D-Boys and Tokyo Marui AK series AEG and GBB rifles. |
| Weight | Approx. 132 g. Useful when considering the overall feel of the setup. |
What to Compare Before Buying
- Exact rifle platform: Check that your AK series AEG or GBB rifle matches the listed compatible makes.
- Rail length: The stated 196 mm length needs to suit your handguard setup and the look or layout you want.
- Rail standard: The 20 mm top rail matters if you plan to mount compatible accessories.
- Part variant: Confirm the B-31C version before choosing an offer, as rail parts are often model-specific.
What Else You May Need
Fit depends on the exact rifle version and configuration, so check that your airsoft gun is one of the listed AK series types before buying. If you are building or replacing parts on a specific replica, confirm the handguard arrangement matches the rail system you want.
Before You Decide
Confirm the 5KU B-31C version, the 196 mm length and the 20 mm top rail against your AK series rifle. Check the listed compatibility with your exact LCT, GHK, CYMA, D-Boys or Tokyo Marui model before choosing an offer.
