GHK G5 to MP5 HPA Adapter - AIRTACUK
GHK G5 to MP5 HPA Adapter - AIRTACUK
GHK G5 to MP5 HPA Adapter - AIRTACUK
GHK G5 to MP5 HPA Adapter - AIRTACUK
GHK G5 to MP5 HPA Adapter - AIRTACUK


GHK G5 to MP5 HPA Adapter

Sale price$131.00
Sold out
Pickup currently unavailable at Open Mon-Thu 4-6pm

GHK G5 to MP5 HPA Adapter

Open Mon-Thu 4-6pm

Pickup currently unavailable

Unit 27/28
Ballymena Business Centre
Galgorm BT42 1FL
United Kingdom


This adapter sits inside the GHK G5 mag-well, and protrudes only to reveal the CNC aluminium mag release paddle, and the US style HPA fitting. You must glue the feed lip pins in place

A donor mag is required for feed lips, exhaust valve and gas route. A CNC valve collar ensures lifelong air seal. Please see the product images for the correction feed lip version (note the position of the two side wings on the lips)

Designed and tested with the CYMA MP5 Mid-Caps listed on our website.

350fps@105psi. Due to sacrificing volume for a low profile design, this adapter will only cycle a few rounds on full auto (some regs will fair better than others!), and is best suited to semi only gameplay, where you will not experience a single issue, and will cycle and feed perfectly! You can absolutely spam semi as fast as you can, all day long.

You will need a GHK valve key for home installation. Diagram to follow, though you’ll almost certainly figure it out on your own, the intelligent person you are ;)

Apologies for not providing the gas magazines for this adapter, but as I’m sure you all know, GHK G5 mags are somewhat hard to come by!

MP5 HPA Adapter Info

  • Replaceable Feed Tube
  • Replaceable Feed Tube
  • Compatible with all CYMA MP5 Mid Caps (65 round metal, 120/130 round metal, Straight, Novritsch Straight, Bullet Window). Available Here
  • Straight Magazines will follow grip of pistol/SMG
  • Small rear tabs can be filed down to accomodate out-of-spec magazines (shown in blue on image below)
  • BB Retention drops only 2 BBs when changing magazine
  • Magazine Insertion will be tight for first few insertions, this is to provide perfect fit