Your question
Contact us
Your name
Phone number
Message topic
Your question

Magazine Extension Tube for MP-153/MP-155 on 3 cartridges 12 gauge

Internal code: 6507
Are available
Only 2 left in stock
2,400 Р To order   items
Approx. 34 USD

The main purpose of the store extension for Mr-153/155 for 3 rounds (Delta-Tech)

Extension cable shop for Mr-153/155 for 3 rounds (Delta-Tech) allows you to increase the magazine capacity of the gun to 7 rounds (caliber 12х70мм). It is installed on the rifle shop pump action shotguns MP-153 various modifications (including export model Remington Spartan SPR-453), MP-133, LL-154, LL-155, MC 21-12. In addition, suitable for mounting on the U.S. carbines Remington 1100 and 1187, the Italian Benelli M4. Extension cable made of duralumin alloy, which is used in the aviation industry is a high strength material having a much lower weight than steel. For protection against thermal and chemical action of powder gases on the external surface coated with a polymeric coating.

The installation of the extension Mr-3 simple and does not require an additional tool (in addition to the installation charge – this requires a screwdriver) or services gunsmith. The extension cord is fastened with screws onto the cap threads of standard store. Optionally you can also install the sling swivel to the gun belt. For reliability, the extension store it is recommended to attach to the trunk with tie straps (not included in scope of delivery). For further questions about the purpose, characteristics, guarantee, purchase or delivery of the extension barrel, a shop Mr-3 (Delta-Tech) – call the specialists of our online store by phone (495) 989-10-56. All questions can be set online on the website, and to read or write reviews about the product.


Before starting work make sure that the weapon is completely unloaded and the safety is on! When installing and removing the extension tube barrel store (PBSO) to ensure no ammunition in the weapon. The amount of ammunition in the weapon according to the "Law on arms of the Russian Federation" shall not exceed 10 ammunition (except sporting events).

Package includes:

  • Tube extender Mr-3 – 1 PCs.
  • Spring – 1 PC.
  • Washer – 1 PC.
  • Sling swivel – 1 EA.
  • Screw for strap clips – 1 EA.
  • Cover – 1 piece
  • Packaging

Technical characteristics of extension store (3 rounds) for Mr-153/155 (Delta-Tech)

Technical data

Extention shop (3 rounds) for Mr-153/155

Fastening on the weapon

Removable: screw, nut instead of a regular store


3 rounds



Designed for weapons

Mr-153, Mr-133, LL-154, LL-155, MC 21-12, the Remington SPR-453"Spartan", Remington 1100/1187, Benelli M4

Physical and operational characteristics


Aluminum alloy В95Т, polymer coating


Matte black

Length, mm


Weight, kg



OOO "Delta-Tek", Tula, Russia

Case material
aluminum alloy
Country of origin
Manufacturer's warranty (years)
Dimensions (mm)
1 × 7 × 5
Package dimensions, place 1 (mm)
500 × 65 × 55
Net weight (kg)
Gross weight 1 (kg)