Official Silverback video workshop
Silverback TAC-41 Long Front Rail Installation Guide
This official Silverback video demonstrates how the long front rail is fitted to the TAC-41 polymer stock, from preparing its nylon-lug hardware through checking the rail against the receiver rail. Use this guide when following the installation sequence or confirming the rail’s alignment, M-LOK layout, stock compatibility and removal requirement before an outer-barrel swap.

01Source-based overview
What this procedure does
The video begins with the rail hardware prepared around four nylon lugs: screws and M-LOK T-nuts are fitted, while the rubber alignment pads are inserted in the shown orientation. The long rail is then placed against the lateral M-LOK slots of the TAC-41 polymer stock. All four lugs engage the slots, and the fasteners are tightened evenly before the alignment is checked with a ruler against the receiver rail.
The official description defines the rail as CNC aviation grade aluminium, weighing 155 grams with hardware excluded. It provides 295 mm of Picatinny rail aligned with the receiver rail and eight 45-degree M-LOK slots, four on each side. The rubber pad, pushed by a grub screw, adjusts vertical alignment and cancels the free-float effect; Silverback suggests mounting a bipod on the tripod mount when using that accessory. The rail must be removed before an outer-barrel swap.
Tools and parts explicitly identified
- ruler
- long front rail
- screws
- M-LOK T-nuts
- four nylon lugs
- rubber alignment pads
- grub screw
- TAC-41 polymer stock
Evidence standard
Every technical statement below is restricted to the official Silverback description, subtitles, on-screen text or visible action. Unstated torque values and compatibility claims are intentionally omitted.
What the footage makes clear
This walkthrough stays close to the official Silverback source. The expanded notes explain what is visible at each checkpoint, while measurements, compatibility and cautions remain limited to what Silverback actually states.
- Installation sequence and visible hardware details are attributed to the visual review observations from the official video.
- Rail dimensions, construction, weight, stock compatibility, alignment function and barrel-swap requirement are attributed to the official video description.
- No official or automatic English or French subtitle track was available.
| Specification | Source value |
|---|---|
| Construction | CNC aviation grade aluminium |
| Weight | 155 grams (hardware excluded) |
| Picatinny rail | 295 mm aligned with the receiver rail |
| M-LOK slots | 8 Mlok slots at 45° angle (4 on each side) |
| Compatible polymer stock colours | SBA-STK-31BK, SBA-STK-31FDE, SBA-STK-31OD, SBA-STK-31WG |
| Product | RAL-31 |
02Primary source
Watch the official Silverback tutorial
Every technical statement below is restricted to the official Silverback description, subtitles, on-screen text or visible action. Unstated torque values and compatibility claims are intentionally omitted.
03Procedure
Silverback TAC-41 Long Front Rail Installation Guide, step by step




- You must remove this rail before attempting a barrel swap.
- Using the rubber alignment pad cancels the free-float effect; Silverback suggests mounting the bipod on the tripod mount if using this accessory.
- All four nylon lugs are engaged in the lateral slots.
- The fasteners are tightened evenly.
- A ruler is used to check alignment with the receiver rail.
- The grub screw is tightened against the rubber pad to correct vertical alignment.
04FAQ
TAC-41 tutorial questions
Which TAC-41 stocks does this rail section fit?
The official description lists the TAC-41 polymer-stock versions SBA-STK-31BK, SBA-STK-31FDE, SBA-STK-31OD and SBA-STK-31WG.
How much rail and how many M-LOK slots does it provide?
It provides 295 mm of Picatinny rail aligned with the receiver rail, plus eight 45-degree M-LOK slots, with four on each side.
What must happen before an outer-barrel swap?
The official description states that the rail must be removed before attempting a barrel swap.

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