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<img src="https://attachments.gorgias.help/z8QbV2PkJn6ogePy/hc/ldzOw7JzMM7oL59m/2026111021-9c005b75-d3ba-4ac0-a937-aa895b7979d9-fig08-mdb.webp" alt="Figure 11" style="width: 420px;" class="fr-fic fr-dib">Figure 11Follow steps 1-5 from <a href="https://extar.us/en-US/ep9-mdb-3-1-field-stripping-9282973">the Disassembly Instructions for Normal Cleaning and Maintenance</a>. The MDB assembly can be removed by tilting the lower receiver forward while simultaneously holding the hammer depressed past the cocked position. This will allow the MDB assembly to be easily removed from the receiver extension. (fig 11) Cleaning and lubrication is recommended every 2000 rounds. Please watch the instructional video detailing this procedure on our website. extarusa.com/mdbservice<img src="https://attachments.gorgias.help/z8QbV2PkJn6ogePy/hc/ldzOw7JzMM7oL59m/2026111021-df7b5af6-8478-4af6-8773-2933dea0d126-mdb-bolt-buffer.webp" alt="Figure 15" style="width: 420px;" class="fr-fic fr-dib">Figure 15<hr><a href="https://extar.us/en-US/ep9-mdb-3-3-reassembly-9282993">&#x2190; Previous: 3.3 Reassembly</a>&#xA0;&#xA0;&#xA0;|&#xA0;&#xA0;&#xA0;<a href="https://extar.us/en-US/ep9-mdb-complete-owners-manual-9283075">Complete Owner&#x2019;s Manual</a>&#xA0;&#xA0;&#xA0;|&#xA0;&#xA0;&#xA0;<a href="https://extar.us/en-US/ep9-mdb-3-5-muzzle-devices-and-handguard-9282995">Next: 3.5 Muzzle Devices &amp; Handguard &#x2192;</a>

Removing the MDB assembly. Clean and lube every 2,000 rounds, with the service video.

3.4 MDB Assembly Service (EP9 MDB)

EP9 MDB

Maintenance

EP Adjustable Receiver Extension Installation Instructions

EP9 Handguard Replacement

EP Pistol Protective Cover Installation

EP9 & EP45 Trigger Group Replacement

EP45 Charging Handle Installation

EP9 Pistol Charging Handle Installation

EP Extended Charging Handle Installation Instructions

Installation Instructions

How to Operate the Safety

How to Field Strip the EP9

How to Operate the Bolt Catch

How to Clean the EP9 Video

Getting to Know Your Extar Firearm

Common Troubleshooting for Extar Firearm Malfunctions

Extar EP45 Owner's Manual

Extar EP9 Owner's Manual

Extar EP9 Carbine Owner's Manual

Extar EP9 MDB Owner's Manual

Owner's Manuals

Bolt Not Going In All of The Way

Common Troubleshooting

Complete Owner's Manual (EP9)

1.1 Read This First (EP9)

1.2 General Firearm Safety Rules (EP9)

1.3 Lead Exposure Warning (EP9)

Safety

2.1 Unloading & Clearing (EP9)

2.2 Loading & Firing (EP9)

2.3 Malfunctions & Failure to Fire (EP9)

How to Operate the Safety (EP9)

How to Operate the Bolt Catch (EP9)

Operation

3.1 Field Stripping (EP9)

3.2 Cleaning & Lubrication (EP9)

3.3 Reassembly (EP9)

3.4 Muzzle Devices & Handguard (EP9)

How to Field Strip the EP9 (EP9)

How to Clean the EP9 Video (EP9)

EP9 & EP45 Trigger Group Replacement (EP9)

EP9 Pistol Charging Handle Installation (EP9)

EP Extended Charging Handle Installation (EP9)

EP9 Handguard Replacement (EP9)

EP Pistol Protective Cover Installation (EP9)

EP Adjustable Receiver Extension Installation (EP9)

Installation & Upgrades

Bolt Not Going In All of The Way (EP9)

Troubleshooting

4.1 Parts Identification (EP9)

4.2 Limited Warranty & Service (EP9)

Reference

Complete Owner's Manual (EP9 MDB)

1.1 Read This First (EP9 MDB)

1.2 General Firearm Safety Rules (EP9 MDB)

1.3 Lead Exposure Warning (EP9 MDB)

2.1 Unloading & Clearing (EP9 MDB)

2.3 Malfunctions & Failure to Fire (EP9 MDB)

2.2 Loading & Firing (EP9 MDB)

How to Operate the Safety (EP9 MDB)

How to Operate the Bolt Catch (EP9 MDB)

3.1 Field Stripping (EP9 MDB)

3.2 Cleaning & Lubrication (EP9 MDB)

3.3 Reassembly (EP9 MDB)

3.5 Muzzle Devices & Handguard (EP9 MDB)

How to Field Strip the EP9 (EP9 MDB)

How to Clean the EP9 Video (EP9 MDB)

EP9 & EP45 Trigger Group Replacement (EP9 MDB)

EP9 Pistol Charging Handle Installation (EP9 MDB)

EP Extended Charging Handle Installation (EP9 MDB)

EP9 Handguard Replacement (EP9 MDB)

EP Pistol Protective Cover Installation (EP9 MDB)

EP Adjustable Receiver Extension Installation (EP9 MDB)

Bolt Not Going In All of The Way (EP9 MDB)

4.1 Parts Identification (EP9 MDB)

4.2 Limited Warranty & Service (EP9 MDB)

Complete Owner's Manual (EP45)

1.2 General Firearm Safety Rules (EP45)

1.1 Read This First (EP45)

1.3 Lead Exposure Warning (EP45)

2.1 Unloading & Clearing (EP45)

2.2 Loading & Firing (EP45)

2.3 Malfunctions & Failure to Fire (EP45)

How to Operate the Safety (EP45)

How to Operate the Bolt Catch (EP45)

3.1 Field Stripping (EP45)

3.2 Cleaning & Lubrication (EP45)

3.3 Reassembly (EP45)

3.4 Muzzle Devices & Handguard (EP45)

EP9 & EP45 Trigger Group Replacement (EP45)

EP45 Charging Handle Installation (EP45)

4.1 Parts Identification (EP45)

4.2 Limited Warranty & Service (EP45)

EP45

EP9 Carbine

3.4 MDB Assembly Service (EP9 MDB)Updated 6 minutes ago