![[Army Force] 6.01mm Inner Barrel for WA M4/M16 GBB [509mm]](http://www.sixmm.com/cdn/shop/products/3efb8334-a1b5-4e40-8dd8-6d23f8ca189b_0433a6de-093b-4b54-863c-b7ab92f2689d.jpg?v=1641362106&width=1200)
![[Army Force] 6.01mm Inner Barrel for WA M4/M16 GBB [509mm]](http://www.sixmm.com/cdn/shop/products/3efb8334-a1b5-4e40-8dd8-6d23f8ca189b_0433a6de-093b-4b54-863c-b7ab92f2689d.jpg?v=1641362106&width=450)
![[Army Force] 6.01mm Inner Barrel for WA M4/M16 GBB [509mm]](http://www.sixmm.com/cdn/shop/products/3efb8334-a1b5-4e40-8dd8-6d23f8ca189b_0433a6de-093b-4b54-863c-b7ab92f2689d.jpg?v=1641362106&width=4096)
All the correct items arrived (3x hi capa mags and 1x oversized 50rd mag), but the o-ring on one of the valves was damaged and it leaked gas. I asked for a replacement o-ring set or full valve assembly but never got a reply. Not completely happy with the service.
I have ordered from SIXmm a couple of times now and the service is excellent; shipping is fast and very reasonably priced. I got the Army Force Magwell for my KJ Works KP-07 and it was a drop in fit, no need for adjustments. I will definitely order again.
Nice and easy to install!
It works perfectly.
Stock works great, minimal wiggle when in the open position
I had to take apart as wasn’t working to find the slider had snapped along with plastic on wheel to had split , thankfully I had these from old gearbox and was able to get firing as gears are good,was going to complain but left too long before I tested