Bracket B-81 "Joker-1" - Zenitco

Bracket B-81 "Joker-1" (hereinafter referred to as B-81) is installed in place of the lower standard forend of carbines based on AR-15 and has a guide Basis for mounting brackets B-2, B-2U, which allows attaching additional equipment to weapons .

B-81 is a solid-milled product made of alloy D16T with a black coating.

Benefits in operation:

• Strength
• Improves barrel cooling
• Creates the ability to attach additional equipment
• Minimum weight and dimensions

Weight: 119 + 3g

Dimensions: (228x41x51) + 5mm (length 22.8 cm (8.98 "))

Working range of ambient temperatures: from -50C to + 50C

Warranty period of storage and operation of the product: 60 months.


To install on a weapon, you must:

1. Dismantle the muzzle device, standard fore-end, gas block, fastening nut.
2. Tighten to fixing nut manufactured by OOO Zenit, after removing the fixing nut from it.
3. Install the B-81 lower bracket.
4. Put on the fixing nut.
5. Put on the adjustable gas block.
6. Through the holes on the lower part of the B-81 lower bracket (having previously shifted it so that the holes on the bracket coincide with the fixing screws on the gas block) or by tilting the bottom bracket so that you can access the fixing screws, tighten the screws on the gas block, thereby fixing the adjustable gas block.
7. Slide the bottom bracket tightly towards the upper receiver so that the Picatinny rails form a single line .
8. Using the wrench included in the kit, tighten the fixing nut, thereby firmly fixing the lower bracket on the carabiner.
9. Place the upper bracket on the lower one and slide it so that it sits in grooves.
10. Using four screws, fix the upper bracket B-71 to the lower bracket B-81.
11. Fix the additional equipment in any convenient place for the shooter.