Uploaded October 2020 | Updated September 2026, 2 weeks ago
1) Mounting options
These Carbon barrel extensions are designed to be used directly on our 24mm threaded outer barrels: SRS G-Spec barrels (A1 & A2) and SRS Sport barrels (16’’ & 20’’). To use these extensions on any other barrels, you will have to use a DT muzzle brake (please check references SBA-FHD-06 silverback-airsoft.com/product/srs-30-muzzle-brake-model-a2 & SBA-FHD-07 silverback-airsoft.com/product/srs-338-muzzle-brake-model-a2-dtss-silencer-compatible/), and a set of timing shims (please check reference SBA-SIL-06 silverback-airsoft.com/product/fine-tuning-shim-set-for-muzzle-brake/). To properly time the muzzle brake, please refer this video : youtube.com/watch?v=829ujuwRL6Q&t .
You can skip the timing procedure if (and only if) you screw the muzzle brake all the way onto the outer barrel thread, ending in an unrealistic position.
2) Inner barrel length
Please refer to the chart (silverback-airsoft.com/pdf/CBX_user_manual.pdf) to know the maximum inner barrel length of your personal configuration. For concentricity reasons, we suggest you also to respect a minimum inner barrel length (100 mm shorter than the maximum length). Your carbon barrel extension is delivered with barrel spacer(s) (1 piece for the XS model, 2 pieces for S/M/L models, and 3 pieces for the XL model). Install a barrel spacer at the inner barrel muzzle extremity, and if necessary, distribute the others on the protruding inner barrel. Additional barrel spacers can be purchased separately (please check reference SBA-BBS-11).
3) Muzzle-Handguard offset
Please refer the chart to know the distance between the carbon barrel extension muzzle and the front face of the handguard. If the distance is negative, that means the carbon barrel extension muzzle will sit inside the handguard.
4) Integral silencer use
It is possible to use your carbon barrel extension as integrally suppressed barrel by using up to 100 mm (suggested) of foam filling on the muzzle side of your carbon barrel extension. Please check the reference SBA-SIL-18 for additional information.
Music credit: Fatal Bazooka - Fous Ta Cagoule [Instrumental]
1) Mounting options
These Carbon barrel extensions are designed to be used directly on our 24mm threaded outer barrels: SRS G-Spec barrels (A1 & A2) and SRS Sport barrels (16’’ & 20’’). To use these extensions on any other barrels, you will have to use a DT muzzle brake (please check references SBA-FHD-06 silverback-airsoft.com/product/srs-30-muzzle-brake-model-a2 & SBA-FHD-07 silverback-airsoft.com/product/srs-338-muzzle-brake-model-a2-dtss-silencer-compatible/), and a set of timing shims (please check reference SBA-SIL-06 silverback-airsoft.com/product/fine-tuning-shim-set-for-muzzle-brake/). To properly time the muzzle brake, please refer this video : youtube.com/watch?v=829ujuwRL6Q&t .
You can skip the timing procedure if (and only if) you screw the muzzle brake all the way onto the outer barrel thread, ending in an unrealistic position.
2) Inner barrel length
Please refer to the chart (silverback-airsoft.com/pdf/CBX_user_manual.pdf) to know the maximum inner barrel length of your personal configuration. For concentricity reasons, we suggest you also to respect a minimum inner barrel length (100 mm shorter than the maximum length). Your carbon barrel extension is delivered with barrel spacer(s) (1 piece for the XS model, 2 pieces for S/M/L models, and 3 pieces for the XL model). Install a barrel spacer at the inner barrel muzzle extremity, and if necessary, distribute the others on the protruding inner barrel. Additional barrel spacers can be purchased separately (please check reference SBA-BBS-11).
3) Muzzle-Handguard offset
Please refer the chart to know the distance between the carbon barrel extension muzzle and the front face of the handguard. If the distance is negative, that means the carbon barrel extension muzzle will sit inside the handguard.
4) Integral silencer use
It is possible to use your carbon barrel extension as integrally suppressed barrel by using up to 100 mm (suggested) of foam filling on the muzzle side of your carbon barrel extension. Please check the reference SBA-SIL-18 for additional information.
Music credit: Fatal Bazooka - Fous Ta Cagoule [Instrumental]
