AAP-01 Hex Outer Barrel - Partner Product Colour:Black at bottom and in center

at bottom and in center of housing to ensure the hopup unit is exactly centered

Now you're ready to dominate the field

This and our picatinny rail are MUST HAVES if you run a MK23

And we'll be releasing further accessories for them in future

but if you pack the inner cavity with foam you may see some noise reduction (no foam included)

AAP-01 Hex Outer Barrel - Partner Product Colour:Black at bottom and in centerThe AAP 01 is a great sidearm, but the stock outer barrel isn't as stable as it could be (especially when firing on full auto). Enter the Project Airsoft AAP 01 Hex Outer Barrel. This upgrade outer barrel fits much more snugly into the upper receiver of the pistol meaning less movement and more accuracy. The inner barrel also fits more tightly than the original meaning more consistency in every shot. Compatible with the original front iron sight, this